Join Date: Jan 2004
Location: Santa Cruz Mountains, CA
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Hi - I am new here. This is a great forum. I have a great new car.
I bought a 2000 540i A/T now w/ 49k mi. and have encountered a sound on startup (happens cold or hot) - a rapid tat-tat-tat-tat that quickly goes away. Sound comes and goes, very irregular. Very annoying. One of those sounds that makes me think maybe there is a larger problem.
First time to dealer he said a sticky lifter and new synthetic oil change seemed to get rid of it. Second visit he only heard it once and said that it was a "normal" sound, maybe Vanos pressurizing with oil (?). Last time at the dealer we couldn't make it happen at all, cold or hot. I still have BMW warranty till 100k or 4/01/06.
Oil pressure coming up doesn't make much sense to me. A theory I have is that the lifter, being cylindrical, may be just slightly worn out of round and that this makes noise when it periodically rotates around to the greatest worn gap.
Any other thoughts?
Any ideas on how to read/print service bulletins on line? Specifically TSB #'s 110101 (June '01) and 110697 (Dec '99). Both deal with similar sounding engine noises . . .
Other than this the car is an exhilirating pleasure to drive.