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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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Old 07-15-2014, 05:04 PM
aleks001 aleks001 is offline
Aleks
Location: Brisbane, Australia
 
Join Date: Nov 2011
Posts: 484
Mein Auto: 2006 BMW 325i
Question e90 325i Alternator and power steering pump issue ?

Hi Guys,

Could you have a look at this video I made and let me know what you think. I don't know if this is normal or not. My alternator pulley definitely has a wobble in it, but I don't know when I spring it manually it makes a bit of a clunking sound if this is normal. I don't hear any rattles when the engine is running though. Also the power steering pump makes a loud rattling sound when moving it back and forward quickly. The pulley itself looks fine, sounds like something internal has broken.




Alternator: You need to turn your sound up to hear it when it spins:


For the alternator, do I need a new alternator or will a new pulley/bearing suffice, the alternator still charges fine and the power steering pump is still working.
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