View Single Post
      12-04-2012, 05:14 PM   #9
psmitty95
Brigadier General
 
psmitty95's Avatar
 
Drives: 2009 E90 335i xDrive
Join Date: Jan 2012
Location: Greenwich, CT/ Dallas, TX

Posts: 3,592
iTrader: (8)

Quote:
Originally Posted by michaeldch View Post
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.
So was your similar to the sound I posted above? Mine would increase in sound to about 1200 rpm then it would go away. No issues on WOT or any loss of power, just the noise slightly at idle and increasing to about 1200.
__________________
< Click picture for photoshoot
E90 335i xDrive 6spd, Nav, Prem, Cold Weather, & Sports package - Msport Conversion
Mods: FBO + Meth JB4 ISO, BB flash, VRSF DP/FMIC, ER CP, Stett, SteveAZ LPFP & more
More Pictures: Build Thread /// Shop I use: Aci Dynamix 408AWHP/ 483AWTQ Uncorrected Mustang Dyno
psmitty95 is offline   United_States
0
Reply With Quote