Engine Performance problem
2000 BMW 740 V8 Two Wheel Drive Automatic 200000 miles
Starting over with this problem and will be as specific as I know how to be
Car ran well but leaked oil so I decided to make it worse.
Recently I changed the valve cover and upper timing cover gaskets, water pump and serp and AC belts.
Upon restart, there is now a lot of dark smoke (oil) coming from exhaust for ten seconds at start-up. Seems to not smoke after that.
My 2 guesses and questions:
1 - Because of the oil leak, I had accidentally overfilled the crankcase after installing the gaskets by about a quart and a half, but drove the car only 10 miles before noticing that, and removed it. Probably only 40 MPH top speed and only a few minutes of driving. Thought I may have blown valve seals, but seems too little to do that.
Question 1: Is it likely I could I blow a valve seal that fast?
2 - Other issue - could I have damaged the OSV or tube while doing the gasket replacements? I checked the oil dip stick and there is NO VACUUM there on operation. That is the only test I know.
Question 2: Could it still be OSV related (I Hope) because I disturbed something there when working on it even though when I check the oil dip stick tube there is NO SUCTION there?
Could it be something I haven't thought of?
Monday, December 28th, 2009 AT 7:30 AM