Replacing the pump on a VAZ 21213 carburetor

Purpose of the pump

The power unit of any car and its components become very hot during operation. More than others, this concerns the combustion chamber, cylinder head and piston group. To maintain an operating temperature of about 90°C, the engine design provides a cooling system. As part of this system, a pump (water pump) circulates antifreeze through the cooling jacket of the engine, thereby reducing its temperature to operating levels.

The water pump has a simple device

If the water pump fails and forced circulation stops, the engine will overheat. Aluminum pistons will expand inside the steel liners and will initially severely scratch the ground walls. In the worst case scenario, the pistons will jam, causing the connecting rods to bend, and the engine will have to be overhauled.

The VAZ 2121 pump is a separate unit consisting of a housing on a flange with a shaft installed inside. On the shaft there is an impeller for pumping coolant (coolant) and a mounting mount for the pulley. The shaft rotates on two bearings, protected from the inside by a seal that prevents coolant leakage.

In a VAZ 2121 car, the water pump is located on the front of the engine above the crankshaft and generator pulleys. It is not attached to the cylinder block directly, but through an additional housing. Most often, the shaft with the impeller fails and must be replaced, but the housing remains in place.

The water pump shaft is rotated by the alternator belt

Troubleshooting

The main reason for water pump failure is severe wear of the bearings. Oil seal leakage is also a consequence of worn bearings. Cases when the oil seal began to leak coolant on its own are very rare.

The symptoms of these malfunctions are as follows.

A suspicious noise is heard in the belt drive area, the intensity of which depends on the degree of wear of the bearings. In the early stages it manifests itself in the form of a hum, and then turns into knocking and grinding. The generator shaft can also make similar sounds - therefore, in this case, additional checking is required.
There is play on the water pump shaft. You can determine it by shaking the shaft with your hand.

The shaft play is felt when the pulley is rocked by hand.

If the bearings are severely worn, the shaft may break into two parts.

If pump problems are not detected in time and the consequences described in paragraph 4 occur, the engine instantly overheats and the coolant quickly leaves the system. In such a case, immediately turn off the engine.

Diagnosing a faulty water pump is quite simple. It is necessary to open the hood and inspect the space around the pulley. If traces of liquid are found, you need to make sure that it is antifreeze and not oil. Then, in order to detect play, you should rock the pump pulley by hand. It should be taken into account that play can occur without coolant leakage through the oil seal. With a small (1–2 mm) play you can drive from 1 to 3 thousand km. After this, repair or replacement of the pump is necessary.

The impeller broke the housing wall and antifreeze leaked out

Video: fault diagnosis and pump repair

Replacing the water pump

The process of replacing the pump on a VAZ 2121 car of various modifications consists of the following steps.

Purchasing a new pump.
Preparation of tools and workplace.
Disassembling the unit and dismantling the old pump.
Installing a new pump and checking its functionality.

The specified sequence of work may change. If you are not completely sure that the pump will fail (perhaps the antifreeze is leaking due to wear on the gasket), you should buy a new pump only after dismantling and diagnosing the old one.

Pump selection

In addition to the standard product from AvtoVAZ, the following pumps are installed on the VAZ 2121 car:

The listed brands offer pumps with plastic and cast iron impellers. Despite the prejudice of car enthusiasts towards plastic products, it is better to choose plastic - the material is durable, lightweight and does not corrode. You should pay attention to the dimensions of the impeller so as not to buy a fake or an old-style product, the efficiency of which is much lower.

When purchasing, carefully study the packaging and trademarks made on the elements of the unit by casting, embossing or laser engraving. The paper seal sealing the lid of the package must contain a barcode and part number 2123–1307011–75.

The original pump can be identified by the manufacturer's marks on the body

On VAZ 21213-21214 cars you can install a pump with catalog number 2107-1307011-75 from classic VAZ models. However, the standard Niva pump has a reinforced design, so such a pump will last noticeably less, and it can only be installed in extreme cases.

If the impeller breaks or otherwise damages the housing, it will also have to be replaced. Pumps are available for sale as individual pumps or as a set with a housing. The pumps for carburetor and injection engine options are absolutely identical.

Video: choosing a water pump for VAZ 2121

Required Tools

If there is a metal engine protection installed under the bottom of the car that blocks access to the lower bolt of the generator, it will have to be removed. This will require an inspection hole or overpass. Otherwise, you can reach the bolt without a hole - thanks to the high ground clearance of the car.

To remove the alternator belt, you need to loosen the nut that secures it.

To replace the VAZ 2121 pump you will need:

flat and Phillips screwdrivers;
mount with a spade-shaped end;
standard sets of spanner wrenches and sockets with a wrench equipped with a ratchet;
a short hose and a container for draining antifreeze (a basin or a plastic canister with a cut off side);
rags, gloves;
high temperature sealant;
liter container with antifreeze antifreeze.

To replace the pump you will need a standard set of tools, protective gloves and a liter canister of antifreeze

When draining antifreeze from the system, some of the liquid will spill. Therefore, you should purchase a liter coolant container in advance for topping up.

Work order

If access to the lower bolt of the generator is blocked by the engine protection, it must be removed on an overpass or inspection pit. Then you should loosen the nut on the generator mounting bolt without unscrewing it completely. In addition, on the VAZ 21214 injection model, you need to dismantle the air duct connecting the receiver to the plastic air filter box.

On the VAZ 21214 injection model, the air duct connecting the receiver to the plastic air filter box is dismantled

Antifreeze drain

The coolant is drained in the following order.

Place a container under the vehicle opposite the drain plug in the form of a bolt located on the left side of the cylinder block next to the oil pressure sensor.

To drain the antifreeze from the cylinder block, unscrew the bolt plug.

The cap on the upper left side of the radiator opens, and antifreeze flows faster

To remove the pump, you should not empty the entire system - drain the antifreeze from the block, expansion tank and radiator, unless you plan to replace the fluid with a new one. It is important to lower its level in the water jacket of the motor below the height where the pump is located.

Dismantling the pump

The procedure for dismantling the pump is the same for all modifications of the Niva.

With the belt tense, use a 13mm wrench to loosen the three bolts securing the pump pulley.
Using a 17mm wrench, loosen the nut on the tension bracket and move the generator housing to the right, towards the crankshaft. A loose generator drive belt can be easily removed from the pulleys.

Replacing the pump of a VAZ 2121 Niva car with your own hands: tips and instructions

The water pump circulates antifreeze in the engine cooling system. Its failure can lead to serious problems, including major engine repairs. Timely detection of a pump malfunction and knowledge of the algorithm for replacing it will help you avoid problems.

Purpose of the pump

The water pump has a simple device

If the water pump fails and forced circulation stops, the engine will overheat. Aluminum pistons will expand inside the steel liners and will initially severely scratch the ground walls. In the worst case scenario, the pistons will jam, causing the connecting rods to bend, and the engine will have to be overhauled.

The water pump shaft is rotated by the alternator belt

Troubleshooting

The symptoms of these malfunctions are as follows.

A suspicious noise is heard in the belt drive area, the intensity of which depends on the degree of wear of the bearings. In the early stages it manifests itself in the form of a hum, and then turns into knocking and grinding. The generator shaft can also make similar sounds - therefore, in this case, additional checking is required.
There is play on the water pump shaft.
You can determine it by shaking the shaft with your hand. The shaft play is felt when the pulley is rocked by hand.
The belt and the area around the pulley are splashed with antifreeze. This also needs to be further checked - a similar effect is observed when the crankshaft front main oil seal loses its tightness. In the latter case, the front of the engine becomes covered with a layer of oil and dirt.
With a high degree of wear, the pump shaft moves to the side along with the pulley. As a result, the impeller breaks the housing, the shaft jams and breaks into two parts, and the generator belt jumps off.

If the bearings are severely worn, the shaft may break into two parts.

If pump problems are not detected in time and the consequences described in paragraph 4 occur, the engine instantly overheats and the coolant quickly leaves the system. In such a case, immediately turn off the engine.

The impeller broke the housing wall and antifreeze leaked out

Replacing the water pump

The process of replacing the pump on a VAZ 2121 car of various modifications consists of the following steps.

Purchasing a new pump.
Preparation of tools and workplace.
Disassembling the unit and dismantling the old pump.
Installing a new pump and checking its functionality.

Pump selection

In addition to the standard product from AvtoVAZ, the following pumps are installed on the VAZ 2121 car:

To cool the engine of an all-wheel drive vehicle, the new impeller is more efficient

When purchasing, carefully study the packaging and trademarks made on the elements of the unit by casting, embossing or laser engraving. The paper seal sealing the lid of the package must contain a barcode and part number 2123–1307011–75.

The original pump can be identified by the manufacturer's marks on the body

Required Tools

To remove the alternator belt, you need to loosen the nut that secures it.

To replace the VAZ 2121 pump you will need:

flat and Phillips screwdrivers;
mount with a spade-shaped end;
standard sets of spanner wrenches and sockets with a wrench equipped with a ratchet;
a short hose and a container for draining antifreeze (a basin or a plastic canister with a cut off side);
rags, gloves;
high temperature sealant;
liter container with antifreeze antifreeze.

Forced engine cooling

Some car owners believe that constant forced cooling of the VAZ 21214 engine with a mechanical fan copes better with cooling than an electronic system with a temperature sensor. To do this, an impeller with six blades is installed on the pump, as on old VAZ models.

Forced cooling is provided by a mechanical fan attached to the pump

Installation of a mechanical fan is carried out as follows.

Disconnect the power connector for the electric fan. Using a 10 mm wrench, unscrew the bolts and remove the fan from the radiator along with the diffuser.
Remove the generator drive belt and pump pulley.
Replace the three short pulley mounting bolts with long ones by screwing in the spacer nuts. Using these bolts, secure the impeller along with the pulley to the pump shaft.

The impeller is secured with long bolts through spacers in the form of nuts or plates

The nuts are installed to ensure that the blades of the new fan do not touch the power steering pulley on the crankshaft. If the nuts are not thick enough, you can place a metal plate or file each blade.

If the blades touch the pulley, they must be trimmed

A fan on the pump is not the best solution, although it may be useful in certain operating conditions. The reason is the load on the pump bearings, leading to accelerated wear. In normal mode, the unit lasts 40-60 thousand km, but with an impeller this mileage can be significantly reduced.

Replacing the pump on a VAZ 2121 Niva SUV yourself is not very difficult. Since it is unacceptable to drive with a faulty cooling system, the pump should be replaced at an early stage of wear. This is especially true for an all-wheel drive vehicle - even a minor problem can cause a rapid increase in engine temperature.

A pump is used to circulate fluid in the cooling system. Despite the high reliability of the unit, the part may fail. The water pump cannot be repaired and must be replaced as an assembly. To do this, you don’t have to be a car mechanic or have a large set of tools.

Replacing the pump of a Niva Chevrolet car

Replacing the water pump on a Chevrolet Niva is done quite rarely - either after installing a defective product, or when the pump’s life has completely expired.

The most typical pump malfunctions:

jamming;
flow;
severe wear of the pump blades;
production of bearings on the shaft.

The main signs of pump failure are the appearance of a whistle or even a crunching sound in the engine compartment while driving.

If the arrow is in the red zone, it indicates a malfunction in the cooling system.

Pump selection

The choice of pump depends on the presence of an air conditioning system in the car. Using an air conditioner requires increased power of the water pump. Otherwise, the pump simply will not cope with increased loads.

For Chevrolet Niva without air conditioning, it is recommended to purchase domestic pumps produced by Fenox or TZA. Their price, depending on the region, is 300–600 rubles.

TZA water pumps are the most popular

For a Chevrolet Niva without air conditioning, a water pump from a VAZ “kopek” is also perfect - it’s not at all expensive.

For cars equipped with air conditioning, it is recommended to install German pumps, for example, those manufactured by HEPU. The increased performance of such pumps is due to enlarged impeller blades. You can buy a pump for no less than 900 rubles.

German pumps have high performance

Pump location

Since the pump impeller is rotated by the timing belt, the pump itself is located in the gas distribution system. To gain access to the pump, you will have to jack up the car, remove the right front wheel and timing case.

The pump is part of the gas distribution system

Required Tools

To replace the pump you will need a standard set of tools:

open-end wrenches;
flat blade screwdriver;
silicone sealant.

To replace the pump, you will need a standard set of tools.
In addition, you will need a container for draining the coolant.

Procedure for replacing the pump

Before starting work, it is recommended to drain the antifreeze. This is necessary for two reasons:

the hose will not burst in your hands from strong pressure;
Coolant will not leak out of the holes and pipes of the cooling system.

After this, with the car jacked up and securely fixed, the right front wheel is removed. Next, perform the following steps:

The generator mount is loosened. The generator is moved as close to the engine as possible, the drive belt is loosened and removed from the pulley.
The three bolts securing the pump pulley to the engine compartment are unscrewed.
The pulley is removed from the pump shaft.
The four nuts securing the pump are unscrewed.
The pump is pulled out of the mounting socket. In this case, you can pry it off with a screwdriver.
The landing site is cleared of remnants of old sealant and other contaminants.
A layer of sealant is applied to the seat.
A new rubber seal is installed.
A new pump is installed on the seal.
Without excessive effort, the pump is secured with four nuts.
The generator pulley and belt return to their place.
New antifreeze is added.
The engine starts and warms up to operating temperature. If there is no coolant leakage and the car does not overheat, then the pump was replaced correctly.

Video: replacing the water pump

This scheme is suitable for Niva Chevrolet cars both with and without air conditioning. The only caveat concerns the removal of the alternator belt. On a car equipped with air conditioning, you can remove the pump pulley directly with the belt - this will not in any way affect the quality of the work performed.

Why do you need a pump in a car?

The cooling system of any car consists of a number of elements and coolant. One of the main parts is the water pump, called a water pump. The element is designed to circulate fluid through the system, resulting in heat being removed from the cylinder head and the cylinder block itself. The pump is not assigned any more functions, but the performance of the motor directly depends on it. If the water pump fails, the power unit will quickly overheat.

The most common pumps are centrifugal type, due to their design features. The part is driven from the engine crankshaft via a belt. The liquid circulates through the cooling system due to the impeller, which is located in the pump cover.

The main part of the pump is located on the outside of the engine, and the impeller is located inside the system. The operation of the pump is quite simple: with the help of a belt, the part from the crankshaft rotates, driving a gear or pulley rigidly fixed to the axis. An impeller is installed on the opposite side of the axis, which also begins to rotate. It is in constant contact with the coolant. When the engine is running, centrifugal force is created, which causes fluid to move through the system.

A pump for a car is necessary to circulate coolant through the engine cooling system and prevent it from quickly overheating

When and how to change the pump on a VAZ 2121 Niva

Why do you need a pump in a car?

When is a pump replacement necessary?

Despite the simplicity of the design of the water pump and its high reliability, the unit is constantly in operation and malfunctions may occur with it, which are better known in advance. The weak points in the element under consideration are the oil seal and bearing. When the bearing wears out, play and noise appear, which damages the seal.

There are a number of signs that indicate the pump is worn out and needs to be replaced:

coolant is leaking in the water pump area;
when the power unit operates, extraneous noise appears;
When the engine is running, play is visually observed.

The listed signs indicate wear of the bearing and oil seal. There are other less common causes of water pump failure. These include: damage to the impeller, the appearance of cracks on the body of the part, wear of the pulley or gear.

It is worth noting that the pump cannot be repaired, but replaced as an assembly, since the design is non-separable: all its elements are pressed into the body. When replacing a water pump, the gasket must also be changed.

The main reasons for replacing a pump are leakage, bearing noise and play.

Replacing a pump on a Niva

On a VAZ 2121 car, the coolant pump is located in the front of the cylinder block on the right side and its dismantling does not cause any difficulties even for beginners.

The pump on the Niva is located in front of the engine on the right side

Replacement Tools

To replace the pump, you will need the following list of tools:

head and ratchet wrench or socket wrench 13;
head at 17;
liquid drain tube of suitable diameter.

During the dismantling process, another tool may be required, for example, a hammer, a screwdriver, depending on the current situation.

To dismantle the pump, you will need a list of tools, which will depend on whether only the pump or the pump is being removed along with the housing

Draining the coolant and replacing the pump

Before you begin, you will need to drain the liquid (water, antifreeze) from the engine cooling system. To do this, you need to place a suitable container on the left side of the engine and, using a key, unscrew the bolt to 13, attach the tube to the drain hole and remove the plug from the radiator neck. Then you can proceed directly to dismantling the pump.

Using a 13 mm wrench or socket, unscrew the three fan bolts. They are also the mount for the pump pulley.

To remove the fan, you will need to use a 13mm socket to unscrew the three bolts securing the impeller and coolant pump pulley

To access the pump, you need to remove the tension bar of the generator using a 17 mm socket.

Using a 13 socket, you need to unscrew the four nuts securing the pump

After unscrewing the nuts, remove the pump from the housing, not forgetting to remove the gasket

There are situations when the pump has to be replaced along with the housing. In this case, you will need to unscrew the two 10mm nuts securing the fluid supply tube to the pump using a spanner wrench or ratchet.

In some cases, it is necessary to replace the pump along with the housing, which is due to the impossibility of repairing it

After which the tube is carefully pulled back. Next, unscrew three 13mm bolts: one on top and two on bottom. Use a Phillips screwdriver to loosen the clamp of the pipe going from the thermostat to the pump, after which it pulls off. Next, the pump along with the housing is removed from the engine.

After replacing the part, do not forget to fill the cooling system with liquid to the required level. 10.7 liters are poured into the cooling system of the Niva car together with the interior heating system. coolant.

Video: replacing the pump on a Niva

Replacing the pump on Niva 21213 with your own hands

There are no fundamental differences in replacing the coolant pump on a VAZ 21213 compared to a VAZ 2121. The difference is that on more modern cars the fan is covered with a special protective cover. To dismantle it, you will need a spanner wrench and a 10mm socket. Use the wrench to unscrew the two nuts that connect the parts of the casing, after which the lower casing is removed. The upper part of the casing is secured with a 10mm head bolt.

Replacing the pump Lada 2131 (VAZ 2131)

One bad January morning, I started the car and started shaking off the snow, letting the Niva warm up a little.
About two minutes later, steam began to pour out from under the hood, and a small stream flowed in the area of the fan. I turned it off and went on foot to the subway. The next day was a day off, off to the garage. They started the Niva in front of the garage again, it was difficult to drive inside up the hill, it was difficult to push. And we watched as, in addition to antifreeze, small metal balls from the bearing also flew from under the hood to the ground. This is how the replacement of the pump in the field began. Nothing special, everything is like a classic Lada. True, there are many author’s photos and small nuances of modern times. Welcome to the cat for details

Replacing a pump in a field, video of how it turned out

Niva Niva Niva! (Man is a wolf to man, and zombies are zombies.) I pulled the field away and went to the store to buy a pump.

The pump was purchased, 700 rubles of money. The pump has a new type of impeller, the same goes for 2107, Lada 4x4, Chevy Niva.

Water pump Lada Niva 21230-1307011-82, with a code as if from a Chevy Niva. Pumps for Niva, Chevy Niva and classics 2101-2107 are interchangeable. But there are two varieties - a pump and a pump housing from a penny, and from 2107. 2107 is exactly our case - a wider impeller and a recess in the housing for it. The main thing is not to use a different housing and the pump itself, it won’t work out very well, of course it will get up. If the body costs a penny, then you need to look for a pump with an impeller that costs a penny. Well, or just buy the kit and don’t bother.

Removing the fan is extremely inconvenient. It is difficult to get your hand or ratchet between the radiator and the fan flange. Three 13 bolts are unscrewed, nothing difficult, just inconvenient.

After removing the pipes, this beauty was revealed. As it turned out, the pump wasn't actually cracked—it was the body that was cracked.

Replacing the pump in the field was still inevitable. Through this picturesque hole, the crumbling bearing threw out its balls, and half of the antifreeze leaked out. The main mistake was that I had to disassemble it first and then go to the store. The pump body is extremely difficult to find, I ran around all the shops and found this body in one of my grandfather’s stalls at the market.

Be sure to remove the generator, it is filled with antifreeze. It is located, as everyone knows, very correctly. Not only is it from below, but also under the cooling pump. When something happens, everything flows into him.

Another tip - the gasket between the block and the pump body is not included with the body. I screwed it onto the old gasket, I had to. The pump comes with a gasket between the pump body and the pump. But we need to take care of the block.

We assemble in the reverse order. Another tip is to install the generator last. After connecting the coolant pipes and filling the radiator with antifreeze. Before pouring coolant into the radiator, you must remove the small pipe from the carburetor through which coolant flows. Otherwise, the antifreeze will not fill up!

Bottom view, when everything is assembled, you can see the new generator, which I changed before the competition on January 11, but that was not the problem.

Before driving, start it and let it warm up. Let's look at the leaks. I first wiped the entire cooling system under the hood with a dry cloth. To see where it's pouring.

This is how the pump replacement in the field ended. As a souvenir, I enclose the most telling photo from this story. Old and new water pump.

Blizzard is on the move again!

To begin with, it’s worth giving a list of the necessary tools that may be needed to perform this repair of our Niva.

Heads for 10 and 13
Collars large and small
Extension
Ratchets
Screwdriver

The order of work is as follows:

First you need to drain the coolant from the system of the VAZ 2121 car
Then we unscrew the pipes that go to the pump, using the necessary screwdriver
After this, use a 10mm wrench, in this case it is more convenient to use a socket to unscrew the tube from the left side, as is clearly shown in the photo below, by unscrewing the two nuts at the top and bottom:

And now we move the tube to the side, applying the necessary force:

Now you can start unscrewing the fastening bolts; first, it is advisable to unscrew them using a wrench, since they can be screwed in quite tightly. And after that, you can throw on a ratchet to do everything much faster and more conveniently. First unscrew the top bolt:

And then the two lower ones, also using an extension cord and a ratchet handle:

And now you can safely remove the Niva’s pump without any obstacles or difficulties, pulling it slightly towards you and swaying it from side to side if it sits tightly on the sealant, as was the case in my case:

We replace the pump on the Niva in the reverse order. The price of a water pump in stores across the country is approximately 700 rubles.

What pumps are installed on carburetor and injection Nivas?

Although the good old Nivas are in many ways similar to the new fuel-injected cars, there are differences, including in the water pumps. The part is produced for different modifications of the car in question. For example, pump 21230–1307011–82 can be installed on all Nivas, but in some cases a spare part for 2107, which has a wider impeller, can be used.

When buying a pump, you need to be careful and make sure that the housing fits the impeller. Otherwise, installation difficulties will arise. To avoid mistakes, you can purchase a complete pump, i.e. cover and housing.

Although the classic pump is suitable for the injection Niva, the part may simply not cope with the high temperature and will need to be replaced sooner. The following types of parts exist:

a standard pump with a plastic impeller, the blades of which are located lower and have an elongated shape;
a new type pump, also equipped with a plastic impeller with longer blades;
HEPU water pump, which has a cast iron impeller.

The last option is considered the most reliable, since the impeller, made of plastic, simply melts and deforms at high temperatures, as a result of which the element can break off the axis and the pump jams. The advantage of spare parts with a plastic impeller is their reasonable price and availability.

The HEPU pump is considered the most reliable option for Niva cars, since the impeller is made of cast iron

Selecting a water pump (pump)

Post by jurgis8 » Dec 28, 2016, 11:10 pm

Re: Selecting a water pump (pump)

Post by vodila384 » Dec 29, 2016, 00:51

Re: Selecting a water pump (pump)

Post by Yurets 2121 » Dec 29, 2016, 9:47 pm

Re: Selecting a water pump (pump)

Post by Constructor » May 03, 2022, 07:25

I’ll continue here about the pump. Should I change gasket 14 or just tighten the M8 nuts (item 9)?

And maybe something will happen to the gaps between the impeller and the pump body? I read about this bullshit.

Re: Selecting a water pump (pump)

Post by Permyak » 03 May 2022, 11:56

Re: Selecting a water pump (pump)

Post by Constructor » 03 May 2022, 13:12

Re: Selecting a water pump (pump)

Post by Constructor » 02 Oct 2022, 07:50

My beauty has splatter all over the front of her engine. At first I thought that the KV oil seal was breaking through. Replaced it with Corteco. Although, when I already removed the old oil seal, I did not notice that it was the oil seal that was to blame. But if I removed it, I replaced it. Now I'm sinning on the pump seal. I want to replace it. But in the workshop they said that no one deals with such a perversion (replacing the pump seal). Replace the entire cover assembly, along with the impeller. This is true? If so, please send me a link: which one is better to take, what to look/check when buying, how to install (features and subtleties), how to tighten so as not to warp, etc.

Added after 6 hours 44 minutes 51 seconds: By the way, tell me, according to the original Lada-Image spare parts catalog for 2015, the pump number is 21230-1307011-82, and according to the catalog for Urban (also for 2015), the pump number is 21073- 1307011-00. So which one to look for and take? Maybe it’s written on the pump itself (which is on the typewriter)? Is the number stamped/cast on it? And if so, can you see this number without removing the pump, or do you need to bend over again with the letter Z?

Re: Selecting a water pump (pump)

Post by Niver » 02 Oct 2022, 14:45

How to install a fan on a VAZ 21214 pump

Some VAZ 21214 owners are faced with a situation where the standard electric fans of the radiator cooling system do not cope with their task. Usually the problem manifests itself in summer in city traffic jams. In this case, you have to think about installing a fan on the pump, like on the VAZ 2121, but you won’t be able to just pick it up and install it. The fact is that the propeller touches the power steering pulley. The problem is solved by installing a spacer in the form of washers between the fan and the pump pulley.

To prevent the fan blades from clinging to the hydraulic booster, you can grind them down a little or install spacers in the form of washers

Some motorists resort to more drastic measures, grinding down the edge of the propeller blade by 2-3 mm using a file.

To install the fan on the VAZ 21214 pump, you need to sharpen the blades a little so that they do not cling to the hydraulic booster

As a result of the described modifications, the engine warms up in almost the same way as with electric fans, but when the temperature reaches +80˚С, then it rises very slowly.

After some modifications, the radiator forced cooling fan takes its place and its operation is not satisfactory.

Even a novice car enthusiast can replace the water pump. The main thing is to take your time and carry out the process in the described sequence, not forgetting to replace the gasket and fill in coolant to the required level at the end of the work.

1 Why do you need a pump in a car?
2 When is it necessary to replace the pump?
3 Replacing the pump on the Niva

4 What pumps are installed on carburetor and injection Nivas?
5 How to install a fan on a VAZ 21214 pump

Why do you need a pump in a car?

The most common pumps are centrifugal type, due to their design features. The part is driven from the engine crankshaft via a belt. The liquid circulates through the cooling system due to the impeller, which is located in the pump cover.

A pump for a car is necessary to circulate coolant through the engine cooling system and prevent it from quickly overheating

When is a pump replacement necessary?

Despite the simplicity of the design of the water pump and its high reliability, the unit is constantly in operation and malfunctions may occur with it, which are better known in advance. The weak points in the element under consideration are the oil seal and bearing. When the bearing wears out, play and noise appear, which damages the seal.

There are a number of signs that indicate the pump is worn out and needs to be replaced:

coolant is leaking in the water pump area;
when the power unit operates, extraneous noise appears;
When the engine is running, play is visually observed.

It is worth noting that the pump cannot be repaired, but replaced as an assembly, since the design is non-separable: all its elements are pressed into the body. When replacing a water pump, the gasket must also be changed.

The main reasons for replacing a pump are leakage, bearing noise and play.

Replacing a pump on a Niva

On a VAZ 2121 car, the coolant pump is located in the front of the cylinder block on the right side and its dismantling does not cause any difficulties even for beginners.

The pump on the Niva is located in front of the engine on the right side

Replacement Tools

To replace the pump, you will need the following list of tools:

head and ratchet wrench or socket wrench 13;
head at 17;
liquid drain tube of suitable diameter.

During the dismantling process, another tool may be required, for example, a hammer, a screwdriver, depending on the current situation.

To dismantle the pump, you will need a list of tools, which will depend on whether only the pump or the pump is being removed along with the housing

Draining the coolant and replacing the pump

Using a 13 mm wrench or socket, unscrew the three fan bolts. They are also the mount for the pump pulley.

After unscrewing the nuts, remove the pump from the housing, not forgetting to remove the gasket. Install the new part in the reverse order, not forgetting to seal the joint between the housing and the pump using a gasket.

Replacing a Chevrolet Niva pump, step-by-step instructions (photos and videos).

Good afternoon, dear readers. The topic of today's article is replacing the Niva Chevrolet pump. Traditionally for our site, the article consists of detailed step-by-step photo and video instructions.

A nice bonus will be a review of pumps from various manufacturers.

To complete the work of replacing the pump we will need:

- antifreeze or antifreeze similar to the one poured in (full capacity is 10 liters, see how much you need)

— sealant (where without it?)

— key for 13 (favorite number on AvtoVAZ?)

— straight hands (we’ll work with them!)

- screwdriver (for removing clamps)

The work can be done anywhere, i.e. no garage or pit required.

As a rule, if the pump malfunctions, the antifreeze runs out, so I don’t describe how to drain it; if it hasn’t drained, drain the remainder (to buy less).

Sequence of actions for replacing a Chevrolet Niva pump:

— Remove the corrugation from the throttle to the mass air flow sensor

— Unscrew all pipes suitable for the thermostat and remove it

— For convenience, unscrew the 3 nuts securing the cooling fan and push it towards the radiator.

— Remove the generator belt — Remove the pump pulley by unscrewing the 3 nuts by 13 (no need to touch the belt tensioners) — Unscrew the 4 nuts securing the pump and one stud (this makes it easier to remove) — Pull the pump out towards the removed stud

— Using a screwdriver or knife, remove all remnants of the old gasket.

— We coat the block with sealant and install the gasket.

— We coat the pump with sealant and install it in place.

Reassemble in the reverse order: Reinstall the pump pulley
Tension the generator belt
We install the thermostat, coating the pipes with sealant
Screw on the electric fan
Filling with antifreeze
We install an air corrugation

We are happy with the money we just saved...

Here is a video instruction on how to replace the pump, you don’t need to disassemble anything unnecessary, and everything is very convenient:

Review of pumps from different manufacturers.

It so happened that cars made in Tolyatti became the main cars in the Russian Federation. And because of their popularity, we have the opportunity to choose spare parts from different manufacturers.

Practice has shown that these pumps last the longest (TZA - original VAZ):

Reasonable compromise (SOATE or fenox):

You definitely shouldn’t buy pumps (Pekar), but, unfortunately, these are the ones that are mainly sold in stores, and they look like this:

Pekarovsk pumps have not been running for over a year! Buy them only as a last resort!

That's all for today, I hope this article was helpful! If you have any questions about replacing the pump on a Chevrolet Niva, ask them in the comments.

What pumps are installed on carburetor and injection Nivas?

When buying a pump, you need to be careful and make sure that the housing fits the impeller. Otherwise, installation difficulties will arise. To avoid mistakes, you can purchase a complete pump, i.e. cover and housing.

Although the classic pump is suitable for the injection Niva, the part may simply not cope with the high temperature and will need to be replaced sooner. The following types of parts exist:

a standard pump with a plastic impeller, the blades of which are located lower and have an elongated shape;
a new type pump, also equipped with a plastic impeller with longer blades;
HEPU water pump, which has a cast iron impeller.

The HEPU pump is considered the most reliable option for Niva cars, since the impeller is made of cast iron

How to install a fan on a VAZ 21214 pump

To prevent the fan blades from clinging to the hydraulic booster, you can grind them down a little or install spacers in the form of washers

Some motorists resort to more drastic measures, grinding down the edge of the propeller blade by 2-3 mm using a file.

To install the fan on the VAZ 21214 pump, you need to sharpen the blades a little so that they do not cling to the hydraulic booster

As a result of the described modifications, the engine warms up in almost the same way as with electric fans, but when the temperature reaches +80? C, then it rises very slowly.

After some modifications, the radiator forced cooling fan takes its place and its operation is not satisfactory.

VAZ 2121 is a rather interesting car that can give you a surprise right on the road. Quite recently, I encountered such a breakdown as a pump malfunction, which caused me to overheat the engine. It is worth noting that if the pump does not circulate antifreeze or antifreeze through the system, the engine overheats greatly and can lead to the most serious consequences, and this is an expensive engine repair. I don’t recommend delaying the replacement of the pump on the Niva, so today I am publishing detailed instructions on this topic.

If you have the time and desire, you can replace the pump on a VAZ 2121 with your own hands in a short time.

Video. Faulty pump on Niva

(we need an urgent replacement of the pump for the VAZ 2121)

For this we need the following tools:

1. Phillips screwdriver. 2. Ratchet handle. 3. Extension cord. 4. Collar. 5. Key head for 10 and 13.

Let us remind you that in the previous article we told you how to install an alarm system on a Priora with your own hands. Now the times have come that you simply cannot save on a car security system, so we looked at a possible way to install an alarm on a car.

Do-it-yourself pump replacement on Niva

To replace the pump, we need to drain the antifreeze or antifreeze from the car's cooling system. We unscrew the cooling radiator cap, then the plug in the cylinder block and drain the coolant into a suitable container. To remove the water pump, you will need to loosen the alternator belt a little in order to carefully remove the part.

We unscrew the nuts that secure the coolant supply tube to the water pump, there are only 2 of them, see the image for more details.

To avoid breaking the tube, carefully move it back. Just add a little effort and you will have to replace this tube too.

Then you need to unscrew the bolt that holds the pump mount on top.

And two more bolts from the bottom, see photo.

Now you need to take a Phillips screwdriver and loosen the clamps of the pipe that runs from the thermostat to the water pump. We pull out the hose, then remove the entire pump body, since there are no more fasteners.

It is worth noting that it is not always necessary to remove the pump on a VAZ 2121 along with the body, but rather just remove the required part. But it’s even easier, you need to take a 13mm wrench and unscrew a couple of nuts with a slight movement of your hand. The cost of a new water pump was about 1,500 rubles, but with the coming crisis you no longer know what the price will be tomorrow.

Installing a new pump on a Niva occurs in the reverse order; do not forget to pour enough antifreeze or antifreeze into the car’s cooling system.

Lada 4x4 (VAZ-21214): Removing the engine coolant pump

Drain the coolant from the engine (see “Replacing the coolant,” page 20).

Remove the auxiliary drive belt (see “Checking the condition and replacing the auxiliary drive belt,” p. 30). Use a 13mm socket to loosen the three bolts securing the coolant pump pulley.

We hold the pulley from turning with a slotted screwdriver, alternately inserting it between the head of each fastening bolt and the shoulder of the pulley hub.

Unscrew the fastening bolts.

Unscrew the adjusting nut completely and remove the bolt.

Remove the pump cover complete with impeller and bearing.

The joint between the cover and the coolant pump housing is sealed with a gasket.

We install the coolant pump cover in the reverse order.

To remove the coolant pump assembly.

Using a 13" socket with an extension, unscrew the two bolts of the lower

attaching the pump housing to the cylinder block.

The joint between the coolant pump housing and the cylinder block is sealed with a gasket.

We install the coolant pump in the reverse order.

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How to check the pump for serviceability

To understand whether the breakdown really relates to the water pump, we will carry out the following steps:

checking the pulley for play. It is enough to rock it from side to side: a strong deviation indicates problems with the pump;
inspection of the drainage hole. If we look at the cut, if the pump breaks down we will see drops of antifreeze around the edges or a strong leak. This symptom often indicates damage to the pump housing;
checking the condition of the tension rollers in the timing system. If there is difficulty in the movement of the bearings, we can talk about a pump malfunction;
if the Niva's additional pump is damaged, a malfunction signal may be problems with the electric drive of the element.