oil leak through filler cap
I bought a 95 740 with 83000 miles on it. the vehicle runs great but i noticed that i am loosing oil from my filler cap. i thought the gasket was bad so i bought another cap. the oil is still leaking can anyone help:wtf
U need to check pressure in engine.
Take next steps: 1. remove cap and hold hand so it simulates cap.
2. If u feel that under the hand is pressure then it's bad. If so, then u need to clean all ventilation tubing on engine. Then maybe it helps to create vacuum in engine. It suppose to help. If not, then u need to check cylinder pressure. There is slight chance that piston rings are causing the problem.
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