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Re: problem with 1990 750il European Model (archive)

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Posted by Richard L. Power on March 12, 2001 at 13:08:31:

In Reply to: problem with 1990 750il European Model posted by Richard L. Power on March 11, 2001 at 20:56:16:

I took car in this morning to have it checked out. It seems as if one cylinder is not working, but is getting fire. They did a compression test and it did not come back good. Seems as if we are getting oil blow by which could be caused by a number of things from a whole in the piston, valve guides bad, valve not closing, and probably several other things. Will change the PCV valves anyway and valve cover gaskets. Thanks for your help. $$$$$$$$$$$$$
revious to this episode, I have been losing some oil that I could not find the source of the leak. My battery went down, and after having jumped the car the first time the car ran for just a short while, then retried with other car engine on for extra power - which the car finally started after about10-12 seconds of cranking. The car ran rough and the OEM light on dash came on. Felt as if car was running on 6 or less cylinders. No power at all. Took forever to get to highway speed. Installed new battery, the OEM light goes off - I have power now but heavy smoke comes out the tail pipes. Anyone with idea what went wrong and what needs to be done to fix it. Tune up - new spark plugs and wires? I think oil is leaking from a valve cover, but does not look like a lot - nothing shows from the bottom of the engine.????? Will gladly accept any advice on what might be wrong.
Thanks Richard





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