What Causes Oil Leakage from the Engine Valve Cover Gasket?

1 Answers
StEva
07/30/25 6:43am
Oil leakage from the engine valve cover gasket is caused by aging of the valve cover gasket or a clogged PCV valve in the crankcase ventilation system. Below are the solutions for valve cover oil leakage: Aging Valve Cover Gasket: If the valve cover gasket becomes aged and brittle, it loses its sealing ability, leading to oil leakage. In this case, the valve cover needs to be opened, and the sealing gasket should be replaced. Clogged PCV Valve in the Crankcase Ventilation System: A clogged PCV valve in the crankcase ventilation system can cause excessive internal pressure, forcing oil to seep out under pressure. In such a situation, it is essential to promptly visit an auto repair shop for maintenance and timely repairs.
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