Nothing can work forever. Unfortunately, sooner or later, any vehicle has to take a hundred to diagnose a variety of breakdowns. Some malfunctions are so serious that it is impossible to correct them yourself. Others, on the contrary, are easily eliminated at home skillful hands. As for the knob's knock, then this is something average. Sometimes it is possible to eliminate the problem personally, but sometimes - without a specialist can not do. About this further in the article.

Stick valve or not that for extraneous sounds in the engine

At first, novice motorists will be quite difficult to understand, as a result of which malfunction from the engine, the other sound is coming. Foreign noises can appear in the event of a belt, crankshaft, bearings, and undoubtedly valves. That is why every car owner should know the features of extraneous sounds in the engine, and also be able to determine the valve it is knocking or something else.

What ringing and in what place it is heard when the valve knock

It is worth noting that the valves make a clear ringing noise with a certain metallic tapping near the gas distribution mechanism. Another feature is to preserve the knock and on large, and on small revolutions.

Naturally, on the ear diagnose the malfunction of the valves by the usual car owner is actually impossible. But, you can conduct an independent diagnosis.

Methods for diagnosing experienced drivers

There are two ways to diagnose:

1. Open the hood and plug holes for the oil bay. Leaving the machine headed, listen. If the noise level is only increasing, it means that the valves are knocked.
2. In addition, you can install near the item, which, in your opinion, has given a failure, a stethoscope. This will make it possible to determine the "nature" of extraneous noise.

Causes of the lock valve

All new cars are equipped with a camshaft, which is located on top. Rods called pushers lead valve into action. The reasons for the flacking of the valves there are several.

Consider them in more detail:

1. As is known, there is a small space provided for by the car manufacturer between valves and pushers. If it increases or decrease, a specific sound with a metallic tapping will occur.
   
2. If the knock is observed when accelerating either while driving at high speeds, it is possible that there is not enough oil pressure to increase the speed of the power unit.
3. If regularly refilled with low-quality fuel, engine detonation can occur.
4. Another reason is the stretching of the belt of the gas distribution mechanism or its incorrect installation.
5. Of course, you should not forget about the worn out, because over time, any element requires replacement.

Stacking valves only on a cold engine, reasons

Diagnostics pay special attention to the temperature of the motor. Depending on what engine (for hot or on cold) knocks the valve, some nuances may appear.

In case the sounds occur only on a cold power unit, there may be causes:

1. Worker of motor itself.
2. Narrowing valves. At high temperature, the metal is expanding, and at low, on the contrary, decreases. As a result, the space between the valves and pushers was small, but after warming up the motor recovered to the factory indicator.

So, the gap between valves and rods may not be responsible for the norm, but when the hot engine is not yet manifested.

Stunt valve on a hot engine, reasons

In this case, the knock may arise as a result:

1. Contaminated oil filter.
2. Insufficient oil level.
3. A poorly swirling bolt camshaft to bed.

In addition to the above moments, noise can produce hydraulic compensators.

Ways to solve the problem after a hundred

The easiest way to solve the problem of the valve knock is a visit to the nearest service station, where the wizards will quickly solve the problem that appears. But finances do not always allow it to do. In addition, sometimes it is much more interesting to mess around with the car, every time gaining more and more experience.

The way to solve the problem with your own hands

The situation with valves at first glance may seem like a simple task in the field of repair, but it is completely wrong. One wrong movement and knock will only increase. Therefore, it is not recommended to take for business to beginners. Before repair work, read the instructions for the repair of your vehicle. The general instruction is shown below.

preparation of the necessary tools and consumables

The correct adjustment of the gaps depends on the presence of consumables and special devices.

In addition, you should have a set of conventional car tools at hand to get to the timing.

Depending on the type of engine gas distribution mechanism, you need to have:

1. Two horn keys on "17" and "13", probe (or a plank with a micrometer) - for cars Gas, VAZ 2101-07 and the like).
2. The set of adjusting washers, the retainer, the device for protecting the valve, probe - for cars VAZ 2108-2109 and the like.

preparatory work

1. Remove the valve cover.
2. Raise one wheel with a jack.
3. We put the device for pressing valves.
4. Then we consider where the graduation and intake valves are located.
5. We turn the wheel until the knee of shaft is at the top, after which you need to measure the gap of the first valve.

adjustment of the distance between the pusher and valves

When the valve knocks, it is necessary to calculate what kind of washer needs. If this is available, it must be inserted. For this there is a special cam, which holds the saddle in the squeezed state.

1 - retainer;
2 - Adjusting washer

This will provide free access to the washer.

Get it clamp or tweezers. The same work is carried out with the rest of the valves.

checking on the knock valves after adjustment

After adjustment, do not forget to check the valve on the knock. Above, we have already described possible ways to diagnose.

Tips Profi: What to do if the knock valves did not disappear after adjusting with your own hands

If, after self-adjustment, the knock did not disappear, take the car to the service station, since it is unlikely to get repaired other problems that are not related to gaps. It is likely that the adjustment was made incorrectly.