Question about 2001 BMW 5 Series

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1999 bmw 538i

Good morning: My bmw have 70000 miles, and is in good shape, but this mornig I start the engine, and a noise came from the botton rigth side of the car, like a "track!track!track, several times. 15 seconds later the noise disapear....and later on the road when I stop at a red ligth the noise return for few seconds.
Do you have any idea? The A.C. is working, and everything look normal!!

Oh , I am concern, and I need help .



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  • SANCHEZ J. Sep 02, 2008

    I will talk to a BMW mecaninc ,tomorrow.




2 Answers

I visited the mechanic, and he had to replace the belts, and the noise is gone!!!!!!!!!!!


Posted on Oct 19, 2008

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One of two things I think, if you are using low octane "Regular" gas in this can and it says it requires premium, the car could be retarding the timing which could cause a knock on idle.
you could also check the compression for a loose valve that could be causing the knock, otherwise you might have a bent rod, which it sounds like you might. The kock will get progressively worse until you fry your engine and have to buy a new one. Good Luck. Talk to a mechanic.

Posted on Sep 02, 2008


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