Does the oil leakage of engine valve cover have a great influence?

Oil leakage from the engine valve cover is not a big problem. It's best to check the cause of oil leakage and repair it. Valve chamber gasket is mainly used for sealing and preventing oil leakage. The gasket is mainly made of rubber. Because of the long service life of vehicles, rubber materials will age and harden, leading to oil leakage. The valve consists of a valve head and a stem. The valve head temperature is very high (intake valve 570670K, exhaust valve 1050 1200K), and it also bears the pressure of gas, the force of valve spring and the inertia force of transmission assembly. Its lubrication and cooling conditions are poor, which requires the valve to have certain strength, stiffness, heat resistance and wear resistance. Generally, the intake valve adopts alloy steel (chrome steel, nickel-chrome steel), and the exhaust valve adopts heat-resistant alloy (silicon-chrome steel). Sometimes in order to save heat-resistant alloy, the exhaust valve head is made of heat-resistant alloy and the valve stem is made of chromium steel, and then the two are welded.

Causes of oil leakage from engine valve cover;

1, the screw is unevenly stressed during assembly;

If the screw is stressed unevenly, it will produce different pressure. Excessive pressure will cause deformation of the engine valve chamber, leading to oil leakage. In this case, the valve chamber should be repaired.

2. The valve cover pad is aging;

It is normal for the valve cover pad to age when the car is purchased for too long or the mileage is too long. In this case, it is only necessary to replace the valve cover gasket and sealing ring.