Checking the condition and replacing the timing belt of the F16D3 Daewoo Nexia N150 engine

Which timing belt, tensioner and idler pulley to install on Daewoo Nexia, when to change

There is no original number. Most often, analogue kits are used for replacement:

• Contitech CT887K1 — 2618 rub.
• Gates K015419XS — 3154 rub.
• INA 530 0332 10 — 2696 rub.

Replacement frequency: every 60 thousand km.

1

To simplify access to the timing belt, remove the air pipe and air filter housing.

2

Next, loosen the three bolts securing the power steering pump pulley to 12.

Unscrew the top bolt securing the generator, remove the generator belt, loosening its tension. To remove the power steering pump pulley, the engine is tilted slightly to the side from the mountings.

3

Unscrew the 3 10mm bolts and remove the upper part of the belt cover.

4

To get to the elements of the lower part of the engine, put the car on a jack and remove the right front wheel. Don't forget about additional insurance; you can put the removed wheel on it.

5

We remove the air resonator and unscrew the plastic mud protection of the engine.

6

If the car has an air conditioner, loosen the tension roller and remove the air conditioner belt.

The crankshaft pulley mounting bolt has a tightening torque of 155 Nm and can be unscrewed using an impact wrench or an assistant. The assistant needs to engage fourth gear and hold the brake pedal firmly. This will lock the crankshaft and the bolt can be unscrewed using a good wrench with an extension and a socket head.

7

Before removing the belt, the piston of the first cylinder is set to top dead center so that the mark on the crankshaft pulley faces the cutout in the metal casing. At this stage you should be more careful so that there are no problems during installation. If you make a mistake with the marks even by 1 tooth, this is fraught with an increase in fuel consumption, and in some modes the car will stall.

After unscrewing the bolts by 10, remove the lower part of the timing belt cover.

8

The marks on the camshaft pulleys should point strictly at each other.

9

Unscrew the two 12mm power steering pump bolts.

10

Unscrew the three bolts of the tension roller and remove it. The parasitic roller is secured with one 14mm bolt.

11

Remove the old belt. The hardest part is to drag it around the power steering pump.

12

A new set consisting of a belt and rollers is installed. The belt is installed in the reverse order.

13

As additional information, before installing a new belt, it is worth checking the cooling system pump for play, bearing noise or antifreeze leaks.

If you suspect any of this, as long as there is good access to the pump, it is better to change it. Be very careful with labels. In the photo there is a special key for adjusting the belt tension by turning the pump.

14

If the pump is not changed and there is no special key for tensioning the belt, the new belt will be difficult to install according to the marks. But in order to get around this, use a 17 wrench to loosen the exhaust camshaft bolt without unscrewing it. Then the new belt is installed according to the marks, the tension roller tongue is pulled up with a suitable tool and the camshaft pulley is seated in place.

15

We wrap the crankshaft twice and check that the marks on the pulleys match. The tongue of the tension roller should align with the protrusion on the platform.

If this is not the case, the tension will still have to be adjusted by turning the pump.

Tools and accessories

There is one peculiarity: the belt is tensioned by a pump and for this we need a special key for 41.

Actually, the key itself and the pump.

The price of the issue is 500 rubles, but if the replacement is a single one, then you can make it yourself by cutting it out of a sheet of metal 1 - 2 mm thick and bending the handle at an angle of 45 degrees. It won’t be very convenient, but you can tighten the belt with such a key, check it yourself.

I apologize for the quality of the photo; my partner’s hands were shaking with excitement.

Why do you need a timing belt?

Daewoo Nexia.
Electrical diagrams Before you make the replacement yourself, you need to figure out what the timing belt is for Nexia Daewoo 8 cl and 16 cl. Its purpose is to synchronize the operation of two shafts: the crankshaft and the camshaft. It also helps operate the water pump. It is a rubber product in the form of a closed inner rim. On the type side there are teeth, which serve for better traction and prevent slipping.

consumable New replacement material

A broken timing belt can have serious consequences for your Daewoo Nexia. When it breaks, the camshaft stops, but the crankshaft continues to move. As a result, the piston knocks on the valves and renders them unusable. This may lead to a major overhaul of the power unit or replacement. It should be noted that where the engine has an 8-valve system, the consequences of a break may be less serious than for a power unit with 16 valves. It may be necessary to replace the valves.

The cause of engine rupture on both 8 cl and 16 cl is most often due to natural wear and tear of the product. Over time, the elasticity of the strap is lost, tissue delamination begins, and parts appear. cracks can break if the tension roller or pump jams, less often when one or several camshafts jam.

Photo gallery

Photo 1. New consumables for Daewoo Nexia

Photo 2. Camshaft marks

Photo 3. Installed new timing belt

We change the belt ourselves on 8 and 16 valve cars

Van046 Blog Refinement of the cylinder head of the VAZ classic

The belt must be replaced according to the regulations or as it wears out. The recommended frequency is every 30-40 thousand kilometers. But it’s better to focus not on the mileage, but on the condition. Necessary.

component tools

In order to replace the strap, you need to prepare a kit which should include the following tools:

• end set;
• spanner wrenches;
• screwdrivers with different special wrenches;
• diameter at “41”;
• hexagon;
• new consumables.

consumables It is better to buy materials from trusted manufacturers, as this guarantees the quality of the product and long-term operation accordingly.

Stages of work

Having prepared the tools and materials, you can begin to work. You can watch the video to understand better.

1. First, the housing of the air filter and everything attached to it is removed.
2. To access the generator pulley, you need to remove the front right wheel and mudguard.
3. Loosen the nut of the air conditioner tensioner roller clamp and remove the roller along with the belt.
4. After unscrewing the bolts on the protective timing case, remove it.
5. Immediately loosen the mounting bolts on the power steering pulley.
6. Having unscrewed the generator bolt a little, you need to move it to the motor and remove the strap.
7. Now unscrew the crankshaft pulley bolt.
8. Next you need to remove the power steering pulley.
9. Before removing the timing belt on the Nexia Daewoo, you need to set the marks. To do this, you need to rotate the entire gas distribution mechanism until the marks on the casing and the camshaft pulley match. The mark on the crankshaft should also coincide with the casing on the mark on the bottom. The camshaft pulley marks should be opposite each other.
10. The next step is to loosen the bolt on the tension roller, and then remove it and the strap. If you have a water pump, check its condition and replace it if worn.
11. Having installed the new tension roller with your own hands, we tighten the new strap. installation You should start with the crankshaft, pump and tension roller. Next, turning the camshaft in a clockwise direction, put the second branch on it with help.
12. We put marks on the pump cranking belt until they match the roller.
    Then we tighten the bolts on the water After.
13. When installing the components, the marks should be checked again; they must match. Next, we return the protective casing and crankshaft pulley to its place.
14. screw it on, then do everything in reverse order.

When the replacement is completed, you should start the engine and check its operation. If there are no interruptions, then that's all. The procedure for replacing the timing belt with your own hands on a Daewoo Nexia with 8 cl and 16 cl ends.

Additional Information

Setting the timing belt to the TDC position may be required in many cases:

Any Daewoo Nexia driver with at least 3 years of driving experience should be able to set the timing belt to the top dead center position.

Although this work is not the easiest, an experienced craftsman installs the piston of the 4th cylinder in just 1 hour.

It is worth paying attention that when replacing the coolant pump, before installing the timing belt according to the marks, you need to drain the used coolant . This work is best done at the very beginning, before removing the accessory belt.

The coolant is drained using a valve on the main radiator of the Daewoo Nexia .

From the list of tools, the master will need:

Source

Why are timing marks needed?

The timing marks are marks along which the timing belt is adjusted, as well as the drive belt is replaced. This element is quite important because it directly affects the operation of the power unit.

What happens if, when replacing a belt, you set the marks incorrectly or don’t set them at all? In this case, you can knock down the gas distribution mechanism, which will lead to many problems. Namely:

• Since the gas distribution has been disrupted, the injection and release of exhaust gases will be carried out incorrectly. Subsequently, the engine may start to stall, stall, fail to start, or consumption may increase. In turn, this can lead to consequences, such as increased wear, burnout of the valve mechanism and piston group, and others.
• Everyone remembers what happens when the timing belt breaks - valve bending. This happens because the gas distribution process is disrupted and the pistons hit the valves, which are subsequently deformed. The exact same principle works in this case. A broken timing mechanism will cause the piston group to fight against the valves, which will simply deform them.
• Shifting the timing mark when changing a belt or adjusting will result in fuel being injected too early or too late. The consequence of this may be flooding of the spark plugs or suction of exhaust gases into the combustion chamber.

In addition to the induced consequences, others may also arise, which can also lead to increased wear and tear of power unit parts or other problems.

About the engine

This car model has won the hearts of many car enthusiasts not only in the regions of the Russian Federation, but also in many other CIS countries. In 2002, a power unit with a displacement of 1500 cm 3 began to be installed on the car, which replaced an engine with 8 valves in the cylinder head. The new engine already has 16 valves, which are driven by two camshafts. The Nexia engine with 16 valves is capable of developing a power of 85 horsepower.

An increase in the number of valves was required to improve the filling of the cylinders with the combustible mixture and the effective removal of exhaust gases from the working area. The use of an electronic engine control system and an injector in the power system made it possible to reduce fuel consumption and improve the dynamic performance of the car. The cylinder block, crankshaft, and pistons are used from the previous model. The cylinder head has received significant changes. The use of 16 valves required the installation of two camshafts.

Since 2008, Daewoo Nexia has been working with a more advanced engine, which has a displacement of 1600 cm 3, the power has increased to 109 horsepower. The cylinder head also has 16 valves, and the engine received an EGR valve. The poor quality of the fuel used often causes it to fail, so drivers get rid of this valve. This significantly reduces the environmental performance of the engine.

Do valves bend when broken?

Four valves per cylinder require consistency in the operation of the entire engine timing mechanism. When the valve train drive mechanism is working properly, there are no problems in the power unit. A broken timing belt damages almost all valves in the cylinder head. In addition, connecting rods, cylinder head guide bushings, and engine pistons may be damaged. Repairing the engine after this will require large material costs.

The designers tried to get rid of this problem; the pistons received recesses in the heads. After this, we did not get the desired effect; the valves are still damaged when the timing belt fails. To avoid such “troubles”. You should be careful when performing engine maintenance and use high-quality consumables.

Necessary tool

We definitely change the pump because the belt is tensioned by it and as soon as we touch it the o-ring will definitely leak. To replace it, we will need a special key for 41. Its price is a little more than a thousand rubles, but if the procedure is one-time, it can be made from metal 1 mm thick and bent as in the photo. One time is enough.

As well as a universal pulley holder, the tool is not required, but it is more convenient with it.

First of all, we buy everything you need: pump, belt, tension and idler pulley.

In Nexia, the engine under the hood occupies almost all the space and this promises us some difficulties. It is very inconvenient to unscrew the front engine mount, but putting it back in place is even more fun. I always remember several times the mother of the Uzbeks who installed this engine like that.

Replacement timing

Manufacturers recommend replacing worn parts of the timing mechanism drive with a mileage of no more than 50 thousand kilometers. Most owners follow this recommendation, but there are exceptions.

The service life of the belt depends not only on the manufacturer of the spare part, but also on the operating conditions of the vehicle and the technical condition of the engine. The condition of the belt is adversely affected by technical fluids that can get into its operating area. If even the slightest leaks of engine oil are noticed, they are immediately eliminated and the belt is replaced with a new product.

Source