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      12-04-2012, 03:35 PM   #8
Enlisted Member

Drives: 2007 335Xi
Join Date: Apr 2011
Location: Kenmore, WA

iTrader: (0)

Originally Posted by BV335 View Post
ps. just looked at your vid. my chirping is at a much faster pace. hmmm...
In my case, the pace of chirping was determined by engine speed, so increasing engine speed caused the pace to increase. I think its also possible that if one of the smaller pulleys (such as the alternator) is the one causing the squeak, the pace will sound faster, even given the same engine speed (because the pulley is turning faster).
In the video, my car is running at warm-idle speeds - ~600rpms IIRC.

Lastly, it seems silly that the dealer is replacing components of the accessory belt drive system apparently one at a time. My thinking is that wear in one component indicates the likelihood that a related part is faulty - this is why I chose to replace all the routine maintenance parts at the same time.
2007 E90 335xi
Cobb AccessPort, BMW Performance Exhaust