A very simple replacement of the timing belt on a VAZ 2110 (2112) with an 8-valve engine

A slightly battered VAZ 2110 with an 8-valve engine, replacing the timing belt, tension pulley and pump. There are 150 thousand kilometers on the odometer, but judging by the condition, it has definitely been damaged a couple of times. The last replacement of the timing belt, according to the client, was almost 50 thousand km ago, immediately after the purchase. The frequency of replacing the timing belt on VAZ 2110 8-valve engines is 60 thousand kilometers or four years of operation. The replacement interval can be increased to 80 thousand kilometers, with periodic monitoring of the condition of the gas distribution mechanism elements.

If the timing belt on an eight-valve VAZ 2110 engine breaks, the valve does not bend.

Belt faults

Malfunctions of the timing belt can arise as a result of its long-term operation, and can also be the result of incorrect adjustment or malfunctions of the pump or tension roller. These include:

• violation of the integrity of the belt (cracks, delamination);
• deformation;
• belt break.

If any of the specified malfunctions are detected, the belt must be replaced.

Signs of wear

The timing belt drive synchronizes the operation of the power unit. This is a very important function. The gas distribution mechanism ensures that the camshaft rotates at a speed lower than the crankshaft. And the main purpose of the timing belt is to release gases through the valves. But when the belt definitely needs to be replaced:

• the belt teeth are worn out;
• the structure has delaminated;
• the ends are torn;
• We have already talked about the presence of oil on the surface.

Why change the belt?

In accordance with the list of routine maintenance for the VAZ 2110, the timing belt must be changed after every 60-75 thousand kilometers, however, here you also need to take into account the conditions of its operation, and this is:

• temperature changes;
• oil getting on the belt;
• problems with the tension roller;
• faulty pump.

All this will inevitably lead to damage.

It is necessary to inspect at least once a month:

• belt (determining its integrity);
• tension roller ;
• water pump gear.

And although on 8-valve VAZ engines, the valve does not bend when the belt breaks, this breakdown can damage the pump or generator.

Setting the piston of the first cylinder to the TDC position

When carrying out work related to removing the camshaft drive belt (timing), the valve timing may be disrupted; to prevent this from happening, the piston of the 1st cylinder is set to the TDC (top dead center) position of the compression stroke. If the valve timing is incorrect, the engine will not be stable or operate properly. Set TDC according to the mark on the camshaft pulley (when installing according to the marks on the flywheel or crankshaft pulley, the piston of either the 1st or 4th cylinder may be in this position). After this, be sure to make sure that the marks on the flywheel or on the crankshaft toothed pulley are aligned (if the generator drive pulley is removed). If the marks on the flywheel or crankshaft pulley do not match, then the valve timing is incorrect (the piston of the 1st cylinder is not installed at TDC). In this case, it is necessary to remove the camshaft drive belt and rotate the crankshaft until the marks align. Important! Rotate the crankshaft exclusively by the pulley mounting bolt (do not rotate the crankshaft by the camshaft pulley itself).

TIP Since it is inconvenient to turn the crankshaft using the bolt that attaches the pulley to it, you can do this in one of two ways

• Engage any gear (it is better if it is IV) and slowly move the car until the mark on the camshaft pulley aligns with the mark on the rear cover of the camshaft drive belt.
• Engage any gear and lift one front wheel. Next, turn the suspended wheel until the mark on the camshaft pulley aligns with the mark on the rear cover of the camshaft drive belt.

Timing belt price

The price of a VAZ 2110 timing belt, depending on the manufacturer, can vary from 400 to 1000 rubles. The tension roller costs about the same, which is recommended to be changed along with the belt. The cost of replacing these timing drive elements is 600-1000 rubles.

To save money, you can replace the belt and roller yourself. There is nothing complicated in this procedure, and no special tools are required. You just need to purchase spare parts.

The table below shows timing belt models for the 8-valve VAZ 2110 from different manufacturers, indicating their catalog numbers.

Honda GC 135 engine analysis

We directly disconnect the engine from the unit (remove the pulleys, starter flywheel, frame, etc.), we get the following:

We unscrew the cover bolts, pry the cover evenly around the perimeter (it sits on the sealant) and remove it, we get the following:

We remove the magneto and flywheel (lock the shaft, unscrew the nut and knock it off the cone by tapping). Don't forget about the keys, don't lose them.

Next is the crankcase. The plane of connection between the crankcase and the head is at an angle. We unscrew it around the perimeter of the crankcase (there are many of them), pry it along the seam with a strong screwdriver (it sits on the sealant). The direction of removing the crankcase is along the crankshaft, and not along the plane; the guide tubes are visible there in the photo.

We gained access to the crankshaft, later we will unscrew the two bolts with the numbers 12.

In order to avoid problems later when assembling and installing the timing belt in the correct position, we will make notes on the pulley and crankshaft gear relative to the marks on the belt. We remove the belt, unscrew the bolts on the crankshaft, remove the piston (here you will have to play around, since it comes out at a certain position. Remove the crankshaft. We received the following picture from the cylinder side

And then we are engaged in examining the problems. In my case, it was a ring on the piston (there were no scuffs on the cylinder). I bought the rings in a Honda brand store (on Google) for 1000 rubles, since the search for a cheap equivalent did not yield anything. Well, since the oil spilled through the air filter, then I carefully cut out the paper of the old filter, bought a regular filter for Lada cars (I don’t remember exactly which model for 100 rubles, the width and thickness were the same), removed the parallon, cut it to the required length and secured it with sealant. By the way, a native filter for GC135 costs approximately 500-600 rubles.

We received a new filter. When assembling, we clean anything, remove old silicone, degrease, apply sealants where necessary, check for unnecessary parts. After assembly, the engine does not start on the first try, so do not be alarmed

Replacement

• keys for 10, 13, 17;
• key for rotating the roller;
• flat screwdriver;
• wheel wrench;
• jack;
• a little engine oil to lubricate the tension roller.

1. Place the car on level ground and put it in gear.

2.Using a 10mm wrench, unscrew the bolts securing the timing case.

3. Loosen the generator belt tensioner using a 13mm wrench. Remove the belt.

4. We check the marks on the camshaft gear and the protrusion on the rear cover of the belt housing.

5.If they do not match, you need to turn the crankshaft until they match. This can be done by rotating the front wheel, jacking it up first, or turning the crankshaft with a 17mm wrench using the crankshaft pulley bolt (the gear must be engaged).

6.Behind the 4th cylinder on the clutch housing there is a rubber plug. We open it by prying it off with a screwdriver. Below it you can see the flywheel crown, which also has a mark. It should coincide with the triangular cut located on the crankcase to the left of the flywheel.

7.If they do not match, you need to loosen the tension roller, turn it to the left, thus loosening the belt, and remove it from the camshaft gear.

8.Using a 17mm wrench, turn the crankshaft as described above until all the marks match.

9.We immobilize the flywheel by locking it with a screwdriver in the hole where the plug was located.

10.Using a 17mm wrench, unscrew the bolt securing the generator pulley.

11.Behind it there is a crankshaft pulley onto which the belt to be replaced is placed.

12.Remove the old one and put on the new timing belt, starting with the crankshaft gear.

13. We fasten the generator pulley by putting a belt on it. Let's pull it on.

14. We dismantle the old tension roller, install a new one, lubricating it with oil on both sides.

15. We tension the timing belt by turning the tensioner roller to the right (if there is no special key, you can insert two suitable pins into the holes and secure with a screwdriver or other similar object). The tension should be 1.5-2 kgf. If you don’t have a tool to measure the tension, we do it the old proven way. The optimal tension is when one plane of the belt can be rotated horizontally by 90 degrees by holding your fingers in the middle between the crankshaft and camshaft gears.

Procedure for removing a worn belt

• We park the car on a level and flat place.
• Open the hood.
• Remove the timing cover (unscrew the two side bolts with a 10mm wrench + unscrew the central bolt with a 17mm wrench).

• Set the piston of the first cylinder to the TDC (top dead center) position. To do this, you need to turn the crankshaft pulley clockwise with a 19-mm head until the wheel mark coincides with the mark on the timing drive housing.

Material on the topic: Coolant sensor VAZ 2110 - malfunctions and replacement

• We open the rubber plug (where the clutch housing is, behind the 4th cylinder) and make sure that the flywheel mark coincides with the mark that is located under the plug (on the body).

• If the flywheel mark does not coincide with the mark, then you need to loosen the tension roller, remove the timing belt and turn the flywheel until the marks match.

• Now you need to lock the flywheel. To do this, take a screwdriver and insert it into the hole under the plug.

• Use a 17 key to loosen the tension of the roller.

• Remove the worn timing belt.
• Unscrew the tension roller nut and remove it.

Please note that it is advisable to change the timing belt in conjunction with a tension roller. If there is noticeable wear on the working surface of the roller, then the tension roller must be changed without fail.

Procedure for tensioning a new belt

• We replace the worn roller with a new one.
• We put a new belt on the toothed pulleys of the crankshaft, oil pump and camshaft.
• We stretch the roller. We use several pins (you can take self-tapping screws about 30 mm long), they are inserted into the holes of the roller, a screwdriver is inserted between them and the roller tension clamp nut is screwed counterclockwise.

The clamping force of the tension nut should be about 2 (kgf). It is best to tighten the roller with a wrench with a force meter.

• We remove the screwdriver from the clutch housing and put the plug in place.
• We check the coincidence of the marks on the crankshaft and camshaft.
• We do not close the timing cover until we test run the engine.

There should be no extraneous noise when the engine is running. There are cases when the belt gets too tight and the tension roller hums when the engine is running. In this case, you need to slightly release the pressure on the tension roller.

• If the engine starts perfectly, close the timing cover, tighten it with bolts and carry out a test drive.

Timing belt replacement process

Timing kit for VAZ

Replacing the timing belt on a VAZ-2112 is carried out once every 50,000 km or if there is a suspicion that it will soon fail. So, replacing this unit must be carried out on a pit or a lift, but if there are none, then it can be done using a jack, since the wheel must be removed.

So, consider the step-by-step process of replacing the timing belt and pulley:

Removing the generator belt

Unscrew and remove the timing case

View of a removed wheel from a car

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Setting the flywheel marks

Fixing the camshafts from turning so as not to disturb the valve timing

Unscrew the generator pulley

Unscrew the fastening nut, remove the roller and unscrew the stud

Removing the timing belt

For complete clarity of the picture, we will describe the drive diagram of the distribution mechanism.

Gas distribution mechanism diagram

1 – crankshaft toothed pulley 2 – coolant pump toothed pulley 3 – tension roller 4 – rear protective cover 5 – camshaft toothed pulley 6 – toothed belt A – mounting lug on the rear protective cover B – mark on the camshaft pulley C – mark on the oil pump cover D – mark on the crankshaft pulley

Belt selection

The choice of belt and roller should be approached carefully. The reliable and uninterrupted operation of the entire gas distribution mechanism depends on the quality of these parts. It is worth noting that in addition to original spare parts, there are also a number of analogues that can be installed on a car.

Of course, do not forget that the belt and roller can be purchased either as a set or separately. The kits can be found on the car market, but with AvtoVAZ’s vision of some changes in the policy of production and sale of spare parts, from October 1, 2015, the manufacturer no longer produces timing kits, and all parts are supplied separately. Therefore, when choosing, you should be very careful so as not to buy a fake.

Let's first consider the choice of belt.

Original

2112-1006040 is the original catalog number of the timing belt for the 8-valve VAZ-2112 engine manufactured by AvtoVAZ. The cost of this product averages 2300-2500 rubles .

Analogs

Also, along with the original, there are a number of analogues that can, and as experience shows, be used by car enthusiasts. Let's consider the main ones.

Analogue timing belt produced by LYNXauto

As can be seen from the table, all analogues are much cheaper than the original, but this does not mean that their quality is lower. As practice and experience show, most products have the same service life.

Video selection

Now, let's look at the original and analog option for purchasing a timing pulley.

Original

2112-1006120 – original catalog number of the timing pulley for installation on VAZ-2112 engines with 8 valves, manufactured by AvtoVAZ. The average market price of the product is 1000-1200 rubles .

Analogue

In addition to the original spare parts, you also have the opportunity to choose from analog manufacturers that have successfully proven themselves in the price-quality category. So, in the table below, there are analogues that can be installed on a car:

Articles

2108-1006120 – roller

Attention: parts 2108-1006120 and 2112-1006120 are not interchangeable!

2108-1006129 – pin for the roller;

2108-1006040-10 – belt;

2108-1006149 – seal under the casing;

2108-1006146 – plastic casing.

Analogs of belts

• GATES 5521 or 5521XS (heavy duty), recommended
• FINWHALE BD-111
• BOSCH 1 987 949 559
• LEMFORDER 58-111-19 or 14458 01
• CONTITECH ST-527
• GOOD YEAR G1474 (semicircular tooth) or G1485 (trapezoid tooth)
• DAYCO 111x190/1

Show all articles

• HANSE HZ 011 008
• BRTI 21080-1006040-10
• TOYOTA 13568-19035
• RENAULT 7701462019
• OPEL 636359
• ROVER GTB1124
• AYWIPARTS AW2110560
• PROCODIS FRANCE 05CD27
• FAI 40305
• GK 791170
• MAGNETI MARELLI 340018181434
• MAPCO 43080
• HEPU 29-0165
• OPTIMAL R-1113
• SCT G124
• WILMINK WG1151273
• VEYANCE G1474
• OPTIBELT ZRK 1123 (3 pcs.)
• TRISCAN 8645 5521 (2 pcs.) or 8645 5124 (2 pcs.)
• FLENNOR 4410 (2 pcs.) or F904410 (belt + roller)
• LYNXauto 111CL19 (1 piece) or PK-1236 (belt + roller)

Analogues of the video

• GATES T42042 or T42042A (2 pcs.)
• MAPCO 23081
• FLENNOR FS99018
• LUK 531 0671 20
• OPTIMAL 0N1917

Show all articles

• BREDA LORETT TDI3009
• TORQUE 830900AE2
• ESPRA 2108-1006120/ES0108
• INA 531075010
• CORAM C747
• VPZ-23 830900AE1

conclusions

Replacing the gas distribution mechanism kit on a VAZ-2112 with an 8-valve engine is quite easy. Another problem remains the correct and timely identification of the problem, as well as the selection of spare parts. If you make the wrong choice, this can cause even more serious consequences for the engine. The same applies to the quality of products.

The question of how to replace the 8 valve belt on a VAZ 2110 with your own hands constantly arises, since such a procedure at stations is expensive. You should know that the part is a product whose main task is to transmit rotation from the crankshaft to the camshaft. In addition, the system also involves a water pump, which is also included in the system. The inner surface of the timing belt is equipped with teeth, the pitch between which varies depending on the type of car model. In order to provide the necessary voltage, the device is equipped with a tension system in the form of a roller.

Purpose of the crankshaft pulley

The crankshaft pulley on the VAZ 2110 serves the following purposes:

• Reducing the amplitude of crankshaft vibrations during resonance. In particular, for this purpose, some craftsmen install a lightweight version of the crankshaft.
• Reducing noise from the operation of the power unit.
• Rotation of mechanisms that are directly involved in the operation of the motor. This happens with the help of gears and a belt.
• The damper, in turn, addresses pulses corresponding to the number of crankshaft revolutions to the ECU.

Crankshaft damper pulley VAZ 2110

The VAZ 2110 car has a crankshaft damper pulley. The pulley itself transmits torque to additional units. The part is a flat ribbed wheel with a special hole for installing a belt. To improve performance, automakers equipped the pulley with a damper. Damper - a rubber layer to dampen vibrations that occur in cars. However, with this innovation, the life of the pulley has been reduced because the damper loses elasticity due to excessive loads. Sometimes the pulley breaks completely, which is why the VAZ 2110 stops moving.

Possible faults

The crankshaft pulley is removed in the following cases:

• In the case of a VAZ 2110 hub turning. In most cases, this occurs due to careless repairs. The VAZ 2110 car is equipped with a special fixing sleeve, which is pressed into the gear. If installed incorrectly, it may fall out, which will cause the hub to rotate.
• In case of lubricant leakage from under the crankshaft oil seal. It needs to be removed and replaced with a new one.

  New oil seal

• In case of strong resonance.
• Incorrect pulley type installations.
• Incorrect damper installation.
• A split in the place where the damper is installed. In this case, replacement is necessary, and better yet, together with the crankshaft gear.
• When removing the crankshaft - for repair work, changing bearings, etc.

Reason for replacing the timing belt

Do-it-yourself replacement of the VAZ 2110 8-valve injector timing belt is carried out after the car has run from 65 to 75 thousand km. Sometimes the number changes. It depends on the operating conditions.

Reasons leading to the need for replacement:

• work in conditions of sudden temperature changes;
• the presence of machine oil on the product, which has a corrosive effect;
• problems in the tension roller;
• the pump has failed.
• natural wear and tear of the product has occurred;
• accelerated failure of the element due to increased loads;
• mechanical damage during repairs;
• manufacturing defect.

In a VAZ car, the links should not be allowed to jump. This causes poor performance of the gas distribution system. There is a danger of the strap breaking.

The question often arises: how to replace the timing belt on a VAZ 2110 8 valve. The main thing is that this procedure must be done in a timely manner, because when it rushes, the valves will bend. On this model, the manufacturer did not include special grooves on the surface of the pistons that would eliminate this problem. It is possible to make them yourself. However, experience is required in such work, otherwise compression may be damaged.

Consequences of incorrectly setting timing marks

If the ignition is set incorrectly, the following negative aspects are possible:

• If the engine has 16 valves, then they become deformed or bent during operation, accumulating damage.
• The previous problem causes damage to the cylinder head.
• The guide bushings may also become unusable.
• Cracks may appear in other engine components.

Crack in the cylinder block

• The motor overheats.
• The engine piston mechanism can burn out.
• Oil residue may appear on the spark plugs.

Oil deposits on spark plugs

The fuel mixture loses its ignition moment.

After repairs, the following factors most often indicate an incorrectly set ignition:

1. The car accelerates worse.
2. Frequent overheating of the motor.
3. The craving became much worse.

List of damage to the timing belt on the VAZ 2110

Replacing the timing belt of a VAZ 2110 8-valve injector with your own hands is carried out:

1. As a result of increased tension, the surface begins to become shaggy. Gaps appear.
2. If the product was loosely tensioned, this leads to cutting off the tooth. In such a situation, replacing the 8-valve timing belt on a VAZ 2110 is required immediately.
3. The teeth are largely worn. This is also a consequence of poor tension adjustment.
4. The surface of the product is covered with small cracks. This happens due to prolonged overheating or hypothermia.
5. Sometimes the wear area is between the teeth. This is also the result of poor belt tension.
6. If oil constantly leaks from the engine and gets on the belt, then the product is removed. Then you need to find and fix the leak. The timing belt is replaced with a new one.
7. On a VAZ 2110 with 8 valves, the timing belt is changed if there was a misalignment during its installation. Its end wear is observed.

When driving the car, you must constantly listen to noises. When it is clearly audible in the engine area, it means you need to stop and tighten the belt.

Choosing a timing belt manufacturer

Knowing how to replace the 8-valve timing belt on a VAZ 2110, you also need to select it correctly. The size of the timing belt VAZ 2110 8 valves is selected based on the number of teeth. Their sum must correspond to the number 136. The width of the drive is 25.4 mm.

The most representative companies include: Gates, Bosch,

Before choosing a product, it is visually inspected for defects. At the same time, the tension rollers are inspected for defects. If necessary, they should also be replaced. There are also companies here that produce quality products: Gates, Power

Visual belt check

Before replacing the timing belt on a VAZ 2110 8 valve, it is necessary to inspect it. It is carried out after a run of 15 thousand km.

Tools are prepared for this:

• keys: overhead and open-end.
• different types of screwdrivers;
• a mount is required;
• pliers with special jaws for proper installation of the roller;
• jack.

The check consists of the following points:

1. There is a special plug on the front protective timing cover that can be removed.
2. The belt is removed from the generator pulley. This is important for ease of use.
3. The timing cover is held in place by 6 bolts that need to be unscrewed.
4. The belt opens. He is visually inspected.

Do-it-yourself replacement of the VAZ 2110 8-valve injector timing belt is carried out in the case when all defects are clearly visible.

When to tension the timing belt

The timing belt of the VAZ-2112 and other VAZ models is tensioned in the following cases:

1. Installing a new belt;
2. Loose belt;
3. “Slipping” of the belt with a violation of the timing adjustment;
4. Replacement of the tension roller and other timing drive mechanisms.

If the cause of the intervention is a broken or “slipping” belt, you must first ensure the integrity of the valves. A broken gas distribution mechanism (drive) leads to engine damage on 16-valve 1.5-liter power units. However, in cases of drive failure at high speeds, valves and CPGs are also destroyed on other engines.

They check the operation of the timing belt on the VAZ-2114 and other models equipped with 8-valve units by turning the camshaft manually. A working mechanism should turn with some effort. A faulty one, as a rule, cannot be affected.

During the procedure, it is necessary to check the compression in each of the cylinders. The easiest way to do this is to tightly cover the spark plug hole with paper. If there is pressure in the cylinder, the plug is knocked out of its seat at a certain stage of camshaft rotation. » alt=»»> A similar check on 16-valve engines is not recommended. The risk of damage to an initially good valve mechanism is too great. There are no grooves in the pistons of one and a half liter engines of this type. Therefore, valves that move down bend when they contact the piston surface.

The process of removing the old belt

To understand how to change the timing belt on a VAZ 2110, you need to study the instructions.

Stages of the soft product replacement process:

1. The wire leading to ground is disconnected from the battery.
2. The alternator belt is removed.
3. The piston of number 1 cylinder rises. The front right wheel must be removed. Setting the VAZ 2110 8 valve timing marks is done by turning the crankshaft in the direction of movement clockwise. The marks of the camshaft gear are aligned with a special antenna located on the rear cover of the timing drive.
4. The bolt on the generator drive pulley is unscrewed and removed. A prerequisite is to lock the crankshaft. This will require at least two people. One is engaged in keeping the crankshaft from possible rotation. The other one, from the clutch housing, removes the plug and unscrews the bolt securing the pulley, which is removed. Immediately there is a check of the coincidence of the marks on the flywheel and the slot in the crankcase.
5. To loosen the nut securing the tension roller, take a size 17 wrench. With its help, the roller is slightly rotated in order to reduce the belt tension.
6. The timing drive is being removed.

We assemble the car in reverse order.

1. Install the timing belt tension roller.
2. We put the timing belt on the toothed pulleys according to the diagram.

Controlling the marks, use a special wrench to turn the timing belt tension roller counterclockwise to the required tension of the belt itself and fix it in this position, tightening the nut of its fastening with a 17 wrench.

We check the timing marks.

Installing a new belt

Then the question arises: how to install a timing belt on a VAZ 2110 8 valves. The work is carried out in the opposite order.

Installing the timing belt VAZ 2110 8 valves consists of the following steps:

1. The tension roller is being fixed. Attention is immediately drawn to the location of the key holes. They are heading outside.
2. To install the VAZ 2110 8-valve timing belt, you need to put it on the crankshaft pulley. The same system includes a coolant pump and a tension roller. It is important to understand: how to tighten the timing belt on a VAZ 2110. A screwdriver is used to carry out this work. It must be installed between the pins that are screwed into the roller. The lever rotates the roller counterclockwise. The belt is then tensioned onto the pulley.
3. Then the tension roller nut and the generator pulley bolt are returned to their place.
4. Now the crankshaft rotates 2 turns clockwise. The crankshaft and camshaft marks are aligned. If the labels do not match, the entire operation is repeated.

Next you need to adjust the strap tension. The rotational movements of the crankshaft are carried out against the direction of movement clockwise. Normal tension is 1.5-2 kg. If there is no special device, then a manual method of checking is carried out. The free section of the belt is grasped with two fingers: the thumb and forefinger. The force should be enough to turn the belt at an angle of 90 degrees.

Knowing how to install a timing belt on a VAZ 2110 8 valve with your own hands, you still need to check the quality of the work done. To do this, start the engine and listen. There should be no extraneous noise. Their presence indicates a strong belt tension. To do this, the fastening of the roller is loosened, and the roller itself is rotated to the left by 10-15 degrees. The field of this system is fixed.

How to change it yourself?

Before changing the timing belt yourself, you need to study the diagram of the gas distribution mechanism, stock up on the necessary tools, and also imagine the order of work in the form of a sequence of actions.

Before replacing, study the timing diagram

There are differences between modifications of the VAZ 2112, but the basic algorithm is approximately the same for all modifications. This algorithm can also be used on VAZ cars of other modifications, for example, 2110. It is necessary to have a good manual that explains the progress of work step by step. And if you have at least a little experience in car maintenance and minor repairs, we can calmly carry out timing belt maintenance ourselves and change the necessary parts.

Tools and materials

The set of basic tools is small:

• socket heads for 10, 15 and 17;
• spanner or open-end wrench 17;
• large flat screwdriver;
• key for the tensioner pulley (if power steering is installed on the car).

The materials required are a new timing belt.

Step-by-step instruction

1. The work begins by removing the negative terminal of the battery.
2. Using a 10mm socket, unscrew the six bolts and remove the gas distribution mechanism cover.
3. The crankshaft sensor chip is disconnected.
4. The crankshaft sensor mount is unscrewed. Then you need to remove the sensor.
5. The sensor hole must be aligned with the part of the pulley where there are no teeth. This is done so that the crankshaft sensor can detect TDC (top dead center). In addition, the area without teeth is used to block the pulley. After alignment, you need to put a 12mm hexagon in the hole of the sensor and fix the pulley.
6. When the pulley is blocked, the generator nut is unscrewed.
7. The belt tension roller bolt is loosened. After this, the belt is removed. Often during this operation the tension and support rollers and the pump are also changed.
8. Installing a new timing belt. There are two ways to correctly install this part. First: put on the belt with the tension roller removed. The tension is adjusted after installing the roller. Second: install the belt by turning the exhaust camshaft pulley using a 17mm wrench.
9. Next, you need to tighten the timing belt using the adjusting bolt. It rotates using a 10 key. Rotation clockwise increases the tension, counter-clockwise weakens it.

Replacing a belt on a car with power steering

If your car has power steering. then the procedure for replacing the timing belt has some differences. Before starting work, it is necessary to remove the power steering reservoir, since it blocks access to the timing belt.

In addition, cars with power steering do not have an adjusting bolt. The belt is tensioned using a tension roller and a special key. If such a key is not available, you can use a homemade device consisting of two nails and a screwdriver. During operation, it is necessary to check the degree of belt tension and, if necessary, tighten it. Finally, you need to tighten the tension roller nut.

Features of labeling

Before tensioning the belt and tightening the bolts, you need to check the position of the marks. If the marks are set incorrectly, this will, at best, manifest itself in a decrease in engine power and traction characteristics. In the worst case, in those engines where valve bending is possible, it can occur even with a fully functional timing belt.

In order to avoid these problems, it is necessary to follow the order of placing labels:

1. After installing the timing belt, but before tensioning it, the marks on the crankshaft pulley and the oil pump housing are aligned.
2. Marks are placed on the intake and exhaust camshaft pulleys.
3. The belt is tensioned, the tension roller nut is tightened.
4. The crankshaft rotates two revolutions. If after this check the position of the marks remains the same, you can replace the crankshaft sensor, connect the power connector and replace the timing cover. Replacement of the VAZ 2112 timing belt is completed.

The stages of replacing the timing belt can be seen in the photo below.

Blocking the crankshaft pulley

Placing marks on the crankshaft

Marking valve pulleys