Do-it-yourself overhaul of the VAZ 2109 engine, video

The power unit is the most durable part of a car when used correctly. But even it requires major repairs after a certain period of time. The timing of the overhaul depends on the timeliness of the technical inspection and ongoing repair work. With proper engine care, major repairs of the VAZ 2109 engine can be avoided until the odometer reaches 150,000 km. If you use the power unit irrationally, repairs may be required much earlier.

Overhaul of the VAZ 2109 (KR) engine involves disassembling the engine into parts, carrying out diagnostics, repairs, and, if necessary, replacing individual components and assemblies. Typically, engine components are repaired by metalworking the elements, then the crankshaft is ground, the cylinder head is milled, and the engine block is cleaned and processed. If you are the owner of an imported car, it is better to entrust this procedure to professionals - service station employees. And Lada Samara drivers can easily repair a VAZ 2109 engine with their own hands, knowing the technology and the sequence of work.

What are the signs that indicate the need for major repairs?

To draw conclusions about the need to repair the VAZ 2109 engine, diagnostics are carried out and on its basis a decision is made as to whether it is worth rebuilding the entire power plant or whether it is enough to repair several specific components so that the power plant gets used to them and operates as usual. A deeply erroneous opinion is that the higher the mileage of the car, the closer the engine is due for a major overhaul.

However, the timing of a major overhaul is delayed if the car has been well cared for, quality maintenance has been carried out, and air filters, technical oil and radiator coolant have been changed in a timely manner. In this case, even if a frightening figure with many zeros appears on the odometer, which shows the number of wheel revolutions, you should not immediately think about overhauling the engine. When the operation of adjacent power plant systems does not raise any complaints, there is no need to rush to thoroughly repair the power plant.

But if the owner of the car neglects the needs of his iron horse: he does not technically maintain it and forces the car to move in conditions for which it is not intended, for example, takes part in races. Very often, after such extreme driving conditions of the car, it will soon urgently need major repairs.

How, where and from whom can you order an engine overhaul?

Now even some auto repair shops have their own websites, where addresses, phone numbers and approximate prices are indicated. But you can always find them in search engines or online maps. At a minimum, so that the craftsmen can name the price tag and deadlines, they must see in front of them what needs to be repaired. Therefore, in any case, you need to bring the car to the service and take an interest in everything there.

Another question is that if there are problems with the engine, the services of a tow truck may be required, but they are not as expensive as it might seem at first glance. There are usually several services in any city, so finding one of them is not a problem.

The most typical problems caused by engine failure on the VAZ 2109 are the following:

rapid wear of seals and seals;
engine oil getting into the air filter housing;
increased engine oil consumption;
white smoke from the exhaust;
increased coolant consumption;
strong smoke from the breather.

To eliminate these problems, it is necessary to carry out troubleshooting and subsequent repair of the cylinder block.

Certain criteria are used to judge whether a VAZ 2109 engine needs to be overhauled:

the first and most important sign is an increase in engine oil consumption, which ambiguously indicates practical wear of the piston rings; it is necessary to reconsider the guide bushings and oil deflector caps that have not developed their technical capabilities;
The final life of the crank assembly, the most important of all engine parts, is checked by measuring compression in the cylinders. For this purpose, the pressure meter is dismantled and a pressure gauge is screwed into place - the power plant must be idling during the procedure. Readings are taken and the indicators are compared with control parameters - if the figure is much less than the control one, with a high degree of probability we can conclude that the bearings and hydraulic pump have exhausted their service life and require immediate replacement with new spare parts;
With characteristic tapping sounds and unstable operation of the power plant at idle, the consumption of an increased amount of gasoline than usual and the inability to achieve full power in the operation of the power plant is recognized as a disorder in the operation of the engine. These moments signal problems in the units around the power plant, but based on the complex of all the signs, it is clearly possible to conclude that a major overhaul is to be done in the near future. When trying to delay major repairs, you need to diagnose the power plant, replace one of the unit parts, or simply tune the engine for full operation. If a set of such measures does not work and the problems remain, it will be almost impossible to dismiss the overhaul of the power plant. Unless the owner completely gives up on his iron horse and puts it in the garage.

Is it worth lightening the pistons?

If you are interested in the idea of tuning in order to increase power, then the answer is clear: it is necessary to lighten the pistons! But if it is in your interests only to make repairs, then it is enough to install new ones. In any case, the increase in horsepower will be noticeable, as engine compression will increase. It is best to entrust the work of lightening to the same turner who is engaged in boring the cylinder block. As you can see, you cannot do a major engine overhaul with your own hands; you will have to resort to the services of specialists.

The essence of the process is to get rid of the “excess” metal in the internal part. To do this, the aluminum from the piston skirt is carefully ground off. Pay attention to whether there are scrapes - recesses for valves in the upper part. If they are present, then purchase repair ones with the same attributes. Otherwise, you will need to rebuild the engine every time the timing belt breaks. And don’t forget that each piston requires rings of the appropriate size - all values can be found in the car’s owner’s manual.

Stages of engine overhaul repair

On the eve of a major overhaul, it is necessary to draw up a detailed action plan:

It turns out which VAZ 2109 engine repairs you can do yourself, and which ones you must trust to a car repair mechanic. Necessary:

choose a place for major repairs - in the best case, it is carried out in the pit of your own garage;
choose a decent lifting mechanism with slings for securing loads - it helps to remove the power plant unit;
the engine parts that have been removed must be placed in special trays that are suitable in size for the engine;
You should not purchase spare parts for the engine in advance - having removed them, you can come to the conclusion that they have become unusable and only then go to the auto store for spare parts;
if the engine is in very poor condition, a second-generation power plant is immediately purchased complete with a cylinder block for a complete replacement;
it is necessary to calculate your financial potential and clearly calculate how much time it will take for major repairs, since this is a very long-term undertaking.

Lada 21099 VAZIKI VAZIKI › Logbook ›

It often happens that the internal combustion engine (ICE) of your car breaks down and requires serious intervention. In such cases, engine overhaul is an inevitable thing that should be resorted to as soon as possible. If you delay this matter, there is a possibility of serious damage to the engine and its complete failure.

Engine overhaul is primarily associated with its complete disassembly, diagnostics, repair and metalworking of some of its elements or replacement of parts. Whether it is a major overhaul of a VAZ 2109 engine or any other VAZ model, metalworking may involve grinding the crankshaft, milling the cylinder head, or honing the cylinder block. Even with simple disassembly and reassembly of the engine, it is always necessary to take into account that you will have to replace the piston rings, main and connecting rod bearings and valve seals. But this cannot be called a major engine overhaul. Rather, diagnostics and regular updates. In this case, such manipulations will not help the engine to provide a noticeable increase in service life, they will only give a temporary change in the quality of its operation.

Stages of assembling a power plant after a major overhaul

When repairing a VAZ 2109 engine with your own hands, you will notice in the video that:

all operating fluids are drained and attachments are removed;
the power unit is separated from the gearbox, the block is removed using lifting mechanisms and placed on a pallet of a suitable size;
the block head and the crank mechanism are twisted, and the places where the caps and bearing shells were located are marked, so that later they can be returned to their place;
parts are inspected - everything that can still work is cleaned, lubricated and returned to its place, and rejected parts are replaced with new spare parts;
when the power unit unit does not need to be replaced, it is cleaned, and special attention is paid to the grooves and supports for the crankshaft;
installing a block of liners on the stock in full accordance with the marks that were made earlier - the antennae of the liners should effortlessly fit into the grooves of the stock;
the crankshaft is cleaned, blown with compressed air and placed on supports;
the half rings for the stop are lubricated with machine oil and secured with grooves to the cheeks of the shaft;
a metal half-ring is attached to the top of the front part of the middle stock - another ring is mounted on the back side; you need to make sure that the half rings do not protrude beyond the ends of the bed;
installation of the shells in the main bearing caps is carried out exactly according to the marks that were made earlier - it is prohibited to swap them, but it is necessary to ensure that the antennae fit into the grooves on the caps;
The main bearing caps are mounted according to the preliminary marks - do not forget that there are two of them on the second and fifth caps;
assess the degree of wear of the fastening bolts and if there is severe deformation, they are replaced with new ones, the fastening bolts are inserted into all holes, but tightened in a strictly defined order at an angle of 120 degrees;
the condition of the pistons group is checked - it can be reanimated, but if it is severely worn, it is better to buy a new one; Before installing a group of pistons, you should make sure that they are correctly oriented in relation to each other;
The piston rings are crimped with a special mandrel, then a piston with a connecting rod without a bottom cover is installed - and here it is important, when installing a new piston group, to take into account the factory marks, and the old marks made earlier by the owner will no longer be noticeable;
the connecting rod is inserted into the crankshaft journal, the bearings are inserted into the mounting caps and lubricated with machine oil;
the connecting rod caps are inserted and secured strictly to the places where they stood before;
mount and reinstall the oil pressure sensor.

Factors for the need for CR

To identify the need for a major overhaul of the Nine, you need to monitor the “symptoms” of your specific car. There are cases when, to eliminate a malfunction, it is enough to make do with scheduled repairs or spot replacement of components. But in some situations, such “refreshing” is not enough, and a faulty unit requires a radical restoration.

It is a mistake to believe that the most important criterion by which the overhaul period of the Lada 2109 is determined is mileage. This is not entirely true. If the driver carefully operates the engine, carries out timely maintenance, replaces the oil filter, oil, and coolant, then even when the indicator reaches 100–150 thousand km on the instrument panel, the car is not in danger of major repairs. And it happens the other way around. With a relatively low mileage, but irrational use of the engine, diagnostics show the need to completely repair the power unit.

The mileage goes on, and the need for major repairs is indicated by specific signs:

oil consumption increases;
compression (compression) in the cylinders decreases;
fuel costs increase;
There is a knocking sound in the VAZ 2109 engine.

An increase in oil consumption in the absence of leaks indicates wear of the piston rings and the inevitability of major repairs. If the engine is breathing, that is, oil leaks occur, you can get by with scheduled repairs. The frequency of replacement is also affected by the condition of the guide bushings and oil seals.

The second factor is the deterioration of the crank mechanism (crank mechanism). The quality of performance of the functions of the crankshaft is indicated by the compression value (maximum pressure in the combustion chamber at the greatest compression of the piston). This indicator can be measured using a pressure gauge, which is fixed in place of the pressure sensor. In this case, the engine must be running. We compare the obtained values with the passport compression indicators (for the VAZ 2109 it should be in the range of 9.5–13 atmospheres). If the measured value does not reach the norm, there is severe wear of the bearings or hydraulic pump.

You cannot ignore such signs as a decrease in the stability of the internal combustion engine, the appearance of characteristic sounds (tapping, tinkling) at idle speed, an increase in gasoline consumption and a decrease in traction. There are times when the engine smokes. If one of these symptoms appears, you can do without major repairs, but if the problems appear in a complex and the engine does not pull, then, most likely, diagnostics will show the need for extensive engine repairs.

If the unit is running to the point of emergency, the VAZ 2109 engine may need to be replaced.

Cylinder head repair

Continuing the repair of the VAZ 2109 engine with their own hands, they begin to repair the engine head. If the diagnostics revealed traces of poor-quality milling, and antifreeze leaked into the oil channel through scratches on the surface of the head. In order to restore the cylinder head, it should be removed and ground - a smooth surface will prevent oil from leaking and losing its professional properties.

Continuing disassembly of the cylinder head, remove the rocker with the spring base and examine the place where the rocker comes into contact with the spring. As the rocker wears out, its upper part becomes noticeably rounded - when installing the rocker obliquely, better regulation of the gap between it and the GDV shaft is necessary. And if the rocker itself is installed at an angle relative to the shaft, then it is no longer suitable and must be replaced with a new spare part. Then the valves and other parts are removed, the shaft and pushers with washers for adjustment are removed.

The condition of newly opened wells with pushers that operate inside them is checked. If the valve guide is severely worn during further operation of the machine, the pusher deviates from the specified trajectory, and the wells cease to be round and take on an unusual oval shape. In this case, it is no longer enough to change only the guides - it is better not to save money and buy a new cylinder head - in extreme cases, the head is processed on a boring machine and the bronze bushing is pressed.

Next, you need to start inspecting the studs and the integrity of the threads on them - if the threads are broken, it is better to replace the stud with a new one. Then the head will easily take its place, because a pin with a poor-quality thread is screwed in with considerable effort, and is even more difficult to unscrew. After restoration, restored or new spare parts are returned to their places along with a new cylinder head gasket.

dismantling the engine of VAZ 2108, VAZ 2109, VAZ 21099 – engine repair

1. Remove the engine from the VAZ 2108, VAZ 2109, VAZ 21099 (see “Removing the engine”). 2. Place the engine on strong supports. 3. Carefully remove the gearbox. Make sure that the splined end of the input shaft does not rest on the diaphragm spring petals. 4. Remove the clutch from the engine (see “Clutch repair” in section 5 “Transmission”). 5. Remove the camshaft drive belt, the tension roller and the spacer washer installed under it (see “Replacing the camshaft drive belt on VAZ 2108, VAZ 2109, VAZ 21099 cars and adjusting the belt tension”) (see “Replacing the tension roller”) . 6. Remove the camshaft gear (see “Replacing the cylinder head gasket”).

Auto repair

Any of the listed malfunctions requires VAZ 2109 repairs - periodic or major.

Periodic car repairs

Regular car maintenance involves maintaining the normal operation of all components and parts of the car. In this case, the VAZ 2109 may not need major repairs for a long time, which will significantly reduce the costs of operating the car. The frequency of maintenance and repair of a VAZ 2109 car must be performed:

Before winter and spring, the technical condition of the car is checked.
After 15,000 kilometers, the oil and filter must be changed to clean it.
After a run of 30,000 kilometers, the fuel filter is changed.
Brake pads must be replaced as they wear out physically.
Every 10,000 kilometers it is necessary to carry out diagnostics of the chassis.
After 60,000 kilometers, the timing belt needs to be replaced.
Spark plugs are changed every 30,000 kilometers.

This work is necessary to prevent possible malfunctions. For more serious interference with the operation of the car, you need to use the VAZ 2109 repair manual. If you follow all its basic recommendations, the car enthusiast will be able to repair the car with his own hands without much effort.

Engine overhaul

The need for major engine repairs may be indicated by:

Instability in the operation of the unit.
Extraneous noise.
Tapping at the knot.
Increased fuel consumption.
Reduced engine power.

When performing work, the technical characteristics of the unit are restored to values that correspond to the original indicators. To do this, the engine is pulled out of the VAZ 2109, disassembled, and a defect list is drawn up. All parts and assemblies are carefully examined, measured, the necessary gaps are measured, and the sequence and cost of repairs are determined. Parts that need to be restored are repaired, those that have become unusable are replaced with new ones. According to the rules, a major overhaul of the VAZ 2109 engine must be done after the car has traveled 150,000 kilometers:

Engine repair begins with replacing rings and pistons.
The cylinder block is bored.
The crankshaft journal is ground.
The starter is visually inspected.
The serviceability of the generator and ignition distributor is determined.
The thermostat, pump, hoses, and drive belts are replaced in the cooling system.
The radiator is cleaned of dirt and washed.

Advice: During repairs, it is imperative to change all rubber elements.

All units are assembled in the reverse order of their disassembly.

Tip: When replacing the cylinder block, the bearing housing assemblies also need to be replaced. This is due to their joint processing.

Repair of the VAZ 2109 cylinder head requires special attention:

The carburetor is removed from the intake pipe (see Repairing a VAZ 2109 carburetor at home).
Its gaskets are removed.
The carburetor heat insulating shield is removed.
The cylinder head is removed from the car.
The warm air intake pipe, exhaust manifold, and intake pipe are removed. The gaskets are removed.

Tip: The sealing gaskets must be removed carefully. If they are not damaged, they are reused.

The spark plugs and coolant temperature sensor are unscrewed.
The camshaft is pulled out.
The tension roller and the thrust washer located under it are removed.
The valves and stops for them are removed.
All parts of the assembly are washed in gasoline, wiped, and dried.
They are visually inspected and their serviceability is determined. If necessary, they are repaired or replaced with new ones.
Assembly of the unit is performed in reverse order.

Chassis repair

Although the engine is the “heart” of a car, the work of all components is interconnected, and timely repair of chassis components is no less important. So:

So, if the front suspension malfunctions, this can disrupt the relationship between the chassis and the body of the VAZ 2109. If such problems occur, urgent suspension repairs are needed. A general view of the front suspension is shown in the photo.

Front suspension of the VAZ 2109 car

Operating a car with a faulty steering rack is extremely dangerous. In this case, it is better to carry out diagnostics in a specialized workshop on a special stand. During diagnostics, the assembly is completely disassembled, a visual inspection is carried out, and the runout of parts is checked.

Tip: When disassembling the unit, gaskets and seals are thrown away, which are considered disposable and must be replaced.

Steering rack VAZ 2109

Replacement of rear brake cylinders.
Replacement of shock absorber struts.
Valve adjustment.
Ignition adjustment.
Fuel pump repair and replacement.
Speedometer repair.
Body repair and painting.
Re-upholstery in the interior ceiling.
And other repair work.

How the VAZ 21099 is repaired can be seen in the video. Do-it-yourself repair of the VAZ 2109 will increase the reliability of your car in good condition.

VAZ 2109: we carry out major repairs correctly

Repair of VAZ 2109 car

The main component of the VAZ 2109 car, which requires periodic or major repairs, is the engine - the heart of the car. The reliability of transport operation depends on the condition of the unit. Therefore, do-it-yourself engine repair and maintenance for the VAZ 21099 will always be a pressing issue. To determine the type of repair, you need to identify the cause of the breakdown.

Engine Condition Assessment

Let’s make a reservation right away that everything said below about how to make repairs applies equally to both carburetor and injection engines of the VAZ 21099 - apart from the power supply and spark generation systems, they have no fundamental differences.

Simply but effectively, the condition of the engine can be assessed by measuring the compression in the cylinders. A normal indicator would be a pressure of at least 10 kg/cm2. Lower values indicate wear of the piston group parts.

If there is a “failure” of pressure in one of the cylinders, while the rest are good, then pour 30-50 g of engine oil into the spark plug hole. If after this the compression increases sharply, then the piston rings are either broken or sunk. The absence of changes indicates burnout of the valves or breakage of their springs.

Skipping the engine removal procedure, let's move straight to how you can assess the condition of its parts and what measures should be taken to eliminate possible defects.

How to determine a motor malfunction

The engine of a VAZ 2109 car, together with the gearbox and clutch, constitute a power unit, which makes up a single unit located on three rubber-metal elastic supports fixed in the engine compartment. Some faults can be diagnosed independently:

Increased clearances in the assembly, very early ignition or insufficient oil pressure are indicated by a metallic, dull sound of the crankshaft main bearings.
A large gap in the bearings or insufficient oil pressure can be indicated by a sharp knock in the connecting rod bearings.
Replacement of pistons or piston rings will be necessary when the piston knocks, which is caused by its beating in the cylinder.
A broken valve spring or mismatched clearances can be characterized by a uniform, constant knocking sound in the valves. To identify worn elements, you need to perform a visual inspection of the unit.
The ingress of foreign particles under the oil pressure valve and failure of the oil pump can be determined by insufficient oil pressure at idle when the engine is warm. When using low-quality motor oil, such problems may also arise.
Excessive pressure in the oil lubrication system indicates that the pressure relief valve is stuck or its spring is too stiff. After replacing the appropriate elements, this problem is eliminated.
An increase in oil consumption can be caused by increased wear of piston rings, engine seals, valve stems, guide bushings, and oil seals.