Do-it-yourself replacement of the timing chain damper VAZ 2107

Sometimes strong blows begin to be heard from under the hood of the VAZ 2107. Usually this is a consequence of the failure of the timing chain damper. Continuing to drive in this case can result in engine damage and costly overhaul. However, self-replacement of the damper is not very difficult.

Purpose and arrangement of the timing chain damper VAZ 2107

The damper dampens the jerks and oscillations of the timing chain, which usually occur at the time of starting the engine. An increase in the amplitude of chain oscillations can lead to its failure from the guide gears of the crankshaft and timing shaft. Moreover, the chain can break at the most inopportune moment.

The failure of the damper can lead to an open timing chain at the time of starting the engine

Usually, a timing chain break occurs at the moment when the crankshaft starts to rotate at maximum speed. It happens instantly. Therefore, the driver is physically unable to quickly respond to the situation and turn off the engine. An open timing chain causes serious engine damage. First of all, valves fail - both inlet and outlet.

Valves VAZ 2107 bent after an open circuit cannot be restored

Learn how to adjust valves on a VAZ 2107: https://bumper.guru/klassicheskie-modeli-vaz/grm/grm-2107/regulirovka-klapanov-vaz-2107.html

Then the cylinders fail. After all this, it is almost impossible to restore the engine. Car owners in such situations usually sell the car for parts. Therefore, the timing chain damper is the most important part, the performance of which must be constantly monitored.

Timing chain damper device VAZ 2107

The timing chain guide VAZ 2107 is a regular high-quality carbon steel plate with two mounting holes.

The timing chain guide VAZ 2107 is made of high quality carbon steel

The second element of the timing chain resting system is the hydraulic chain tensioner shoe. It is located under the timing cover next to the damper. The surface of the shoe in contact with the chain is covered with a durable polymer material.

The tensioner shoe is the second element of the chain damping system, without which the damper operation is impossible

To gain access to the chain guide, you must:

• unscrew the timing cover;
• Slightly loosen the chain tensioner.

Without this, it will not be possible to remove the damper.

The principle of operation of the timing chain damper VAZ 2107

When starting the VAZ 2107 engine, the timing shaft and crankshaft begin to rotate. It doesn't always happen at the same time. The fact is that these shafts have toothed sprockets that are connected by a timing chain. This chain can wear out and sag over time. In addition, sometimes the teeth on the guide sprockets break, and the chain slack increases. As a result, when starting the engine, the timing shaft begins to rotate only after the crankshaft has already turned a third of a turn. Due to this desynchronization, the timing chain begins to sag even more and can fly off its sprockets. To prevent this from happening, the chain resting system begins to work, consisting of the tensioner shoe and the damper itself.

The main elements of the chain damping system are the damper and the tensioner shoe, which work in pairs.

The tensioner shoe is connected to an oil line, on the fitting of which an oil pressure sensor is installed. When the timing chain begins to sag too much, this sensor detects a sharp drop in lubricant pressure. An additional portion of oil is pumped into the oil pipeline, under the pressure of which the tension shoe extends from its fitting and sharply presses on the sagging timing chain, preventing it from flying off the sprockets. Since the shoe presses very sharply and strongly, the chain under its influence begins to oscillate strongly, and the vibrations do not occur under the shoe, but on the opposite side of the chain. To dampen these vibrations, the chain damper is designed.

The damper is just a solid metal plate, on which the timing chain beats at the moment the tension shoe is activated. It has no moving parts. However, without a dampener, the sprocket teeth and timing chain links will wear out much faster, which, in turn, can lead to serious engine damage.

Symptoms of a malfunction of the VAZ 2107 chain damper

Typical signs of a failure of the VAZ 2107 timing chain damper include:

1. A characteristic loud rattle and blows are heard from under the timing cover. These sounds are as loud as possible immediately after starting the engine, especially if it is cold. The loudness of the rattle is determined by the amount of slack in the chain - the more slack in the chain, the louder the sound will be.
2. Power failures during engine operation. They are most noticeable when starting a cold engine. A worn damper cannot dampen chain vibrations in a timely manner, which leads to a mismatch in the rotation phases of the crankshaft and timing shaft. As a result, the synchronous operation of the cylinders is disrupted. The engine begins to respond inadequately to pressing the accelerator pedal, failures appear in its operation.

Causes of failure of the VAZ 2107 chain damper

Like any other part, the VAZ 2107 chain damper may fail. This can happen for the following reasons:

1. Loosening of fixing bolts. The mechanical load on the damper is constantly changing. Under the action of continuous blows of the chain, the fastening bolts gradually weaken. As a result, the damper loosens even more, and as a result, the bolts break.
   

   Chain guide bolts loosen and break over time
2. metal fatigue. The loads acting on the damper are of an impact nature. With any impact of the timing chain, a microcrack may appear on the surface of the damper, which cannot be seen with the naked eye. For a while, nothing happens to the crack. But at a certain moment, with the next strike of the chain, it begins to grow rapidly, and the damper instantly breaks.
   

   Timing chain guide can fail due to metal fatigue failure

More about replacing the timing chain: https://bumper.guru/klassicheskie-modeli-vaz/grm/grm-2107/zamena-cepi-grm-vaz-2107-svoimi-rukami.html

Replacing the timing chain damper VAZ 2107

To replace the damper you will need:

• a new timing chain damper for the VAZ 2107 (today it costs about 500 rubles);
• a piece of steel wire with a diameter of 1.5 mm and a length of 20 cm;
• set of open-end wrenches;
• a set of socket wrenches with a collar;
• flat blade screwdriver.

Sequence of work

Work on replacing the VAZ 2107 chain damper is carried out in the following order.

1. The air filter is removed. To do this, with a 12-mm open-end wrench, five bolts securing the filter are unscrewed. It is impossible to get to the damper without dismantling the filter.
2. With a socket head for 13 with a ratchet, the fastenings of the cylinder block cover are unscrewed. The cover is removed.
3. With a spanner wrench of 13, the special cap nut securing the chain tensioner to the timing is slightly loosened.
   

   The cap nut for fastening the chain tensioner is unscrewed with a spanner wrench 13
4. With a long flat screwdriver, gently push the tensioner shoe to the side.
   

   The screwdriver used to pry off the chain tensioner shoe must be thin and long
5. The shoe is held with a screwdriver in the depressed state, and the previously loosened cap nut is tightened.
6. A hook is made from a piece of wire, which is threaded into the eye of the chain guide.
   

   The hook for extracting the dampener is made of durable steel wire.
7. The damper mounting bolts are loosened. In this case, the damper is held by a hook - otherwise it will fall into the engine.
   

   When unscrewing the fixing bolts, the damper must be held with a steel hook
8. After removing the damper mounting bolts, the timing shaft is rotated a third of a turn clockwise using a spanner wrench.
9. After loosening the timing chain tension, the damper is carefully removed with a hook.
   

   You can remove the chain guide only after turning the timing shaft
10. A new damper is installed in place of the failed damper.
11. Reassemble in the reverse order.

Read also about the VAZ 2107 belt drive device: https://bumper.guru/klassicheskie-modeli-vaz/grm/grm-2107/metki-grm-vaz-2107-inzhektor.html

Video: replacing the timing chain damper VAZ 2107

Replacing the chain damper in the engine on a VAZ 2107.

Thus, replacing a failed VAZ 2107 timing chain damper is quite simple even for a novice motorist. This will save about 800 rubles - this is the amount that the work of replacing the damper in service centers is estimated at.