My valve cover bolts weren't sufficiently tight on my 89 M103 and there was some leaking occurring out of the front area. There was a head job done on the car years ago before I got the car (no jokes about head jobs please), and I guess the tech was trying to not tighten the valve cover bolts too tight but after a few years they weren't tight enough. I don't think this is a common cure but it reduced my leakage (no jokes please) by about 80%
Regards, Eric

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