What are the causes of engine oil cap leakage?
1 Answers
The causes of engine oil cap leakage are as follows: Oil cap seal failure: The oil cap has aged, losing its sealing ability and causing oil leakage. The oil cap needs to be replaced. Valve cover gasket aging: The valve cover gasket has aged and become brittle, losing its sealing ability and causing oil leakage. Simply opening the valve cover and replacing the gasket can resolve this issue. PCV valve blockage: A blocked PCV valve in the crankcase ventilation system causes excessive internal pressure, leading to oil seepage under pressure. Determining whether the PCV valve is functioning properly is very simple: at idle, use your finger to check the vacuum at the crankcase air intake to instantly assess the PCV valve's working condition.