Bimmerfest - BMW Forums - View Single Post - Z4 S54 Rattle... Idler Pulley/water pump?
View Single Post
Old 12-29-2012, 03:19 AM
brock5ga brock5ga is offline
Registered User
Location: Monroe, GA
Join Date: May 2012
Posts: 97
Mein Auto: Z4
If you can get it to make the noise again as in the first video, remove the belt and see if the noise goes away. You can also remove the belt and rotate all pulleys to check for roughness or binding, also checking side to side play. Also look at the belt tensioner, check it for alignment with the other pulleys. Look at it from the side and make sure it isn't cocked out from wear. If you align all the pulleys with your eye, it should not stick out further than the other pulleys. Also watch it with the engine running for excessive vibration and rattling resulting from a weak spring.
Reply With Quote