20 13 A6L2.5 displacement timing rear cover leaks oil.

Causes of oil leakage in timing cover.

1, the valve cover gasket is really aging and fragile, losing its sealing ability, resulting in oil leakage. You can open the bonnet and replace the gasket to deal with it.

2. Because the PCV valve is blocked, the pressure in the crankcase ventilation system is too high. When idling, test the vacuum degree of crankcase air inlet with your finger, and you can immediately judge the working state of PCV valve.