Of course, lubrication is necessary for normalwork of the engine and its components. Interestingly, the ingress of oil into the combustion chamber itself can lead to a complete overhaul of the entire engine. But its presence on the walls of the camshaft just contributes to the smooth and uninterrupted operation of the entire car. Therefore, when the valves move, the oil removes special protective elements from the stem - the oil wiper caps. About them today.
What are they needed for?
The main function of this part is toclosing the valve, which eliminates the possibility of oil penetration inside. Oil wiper caps always fit snugly to the valve surface, but still a few milliliters of lubricant penetrates through them. This is normal since the part should not run dry. But an excessive amount of oil already adversely affects the operation of the valve.
What are the valve seals made of?
By design, this item representsa rubber bushing with a rigid steel base. That is, the main component of the oil wiper caps is rubber, since the serviceability and service life of the whole mechanism depends on the degree of its wear. The steel base can serve forever, so it does not matter as much as its second component. As for the rubber itself, there are also nuances here. If the cap was made of acrylate or recycled rubber, be sure: this item will last a very long time. If other components are part of rubber, their service life can be very short. Therefore, it is better not to purchase such parts.
When is the replacement valve stem seals made?
VAZ 2109, like all other domesticcars, has similar symptoms in the leakage of this part. The main sign of loss of rubber properties will be increased oil consumption. You can also observe blue or bluish smoke from the exhaust pipe (but this may also indicate a major overhaul of the engine). However, if you do not observe these symptoms, do not assume that the condition of the caps is perfect. As a rule, manufacturers recommend changing this part every 20 thousand kilometers. Therefore, even if you do not have increased fuel consumption, upon reaching this mileage, make sure to replace this mechanism. This work is not so difficult to seek help from a service center. Everything can be done with your own hands. In addition, the cost of replacing the valve seals on the service station is 5 thousand rubles.
Finally, a little advice. If you make a replacement with your own hands, be sure, in addition to new caps, get the valve crackers puller. It can be found absolutely in any auto shop.
