What's the oil leakage from the check valve of Volkswagen Bora 1.5 valve cover?

It means that the pressure or temperature in the body is a little high, and the paint is coming out of the one-way valve.

Most of the oil leakage at the valve cover appears in the form of covering sludge. For car owners who don't know much about automobile engine technology, this kind of fault doesn't seem to be serious. They think that such oil leakage is nothing and don't have to worry about the amount of oil stored in the engine.

However, we must solemnly remind car owners that when you find oil leaking from the valve cover of your car engine, you must pay close attention to the oil stock. As mentioned earlier, the greater possibility of oil leakage from the valve cover is caused by the failure of the crankcase ventilation system. Under the action of pressure, engine oil will not only leak into the engine, but also into the combustion chamber. The oil leakage of multiple oil leakage points is superimposed, and the oil level will drop rapidly, resulting in insufficient lubrication of engine parts.