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1999 BMW 3 Series
Problem for BMW 1999 3 Series

Engine noise at idle




By john_baugher on May 22, 2009

" "
I have a 1999 BMW 323i. It started making a sound at idle like maybe a clutch fan going bad, so I replaced the clutch fan, the belt and the water pump. Needless to say I still have the noise. It is just at idle. It gets worse when the A/C is on but idk if that has something to do with the RPMs ???

Solution #1

posted on May 23, 2009
Not Rated)

ENSANE1970

Rank: Guru 
Rating: 92%, 29 votes
It sounds like one of your idler pulleys for your drive belts is going bad. I'd take the belts off and spin these pulleys, If either one of them feels "funny" thats your bad guy.
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