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View Full Version : Low RPM rumble/rattle


828gary
11-19-2009, 10:50 AM
Under load at (1200-1400RPM) going 30-40MPH I hear an occasional rumble/rattle. It sounds like either the transmission (a loose mount?) or exhaust vibration. Any insight into this problem. Thanks.
IcemanBHE
11-19-2009, 11:08 AM
Center shaft bearing or...more likely the rubber guibo joint. Or both.

Id certainly replace them as a combo, if one is bad.
Showtime22
11-19-2009, 12:54 PM
A loose exhaust would make noise over bumps and curbs. If you feel like getting dirty you could drive a side onto a curb for more room - get under the car and wiggle the exhaust. Bearings do a lot of grumbling when failing.
Aindriu
11-19-2009, 04:59 PM
I think this is the first BMW I have ever owned where I didn't have to change the exhaust O brackets. They are usually knackered at this age.
joes95740
11-19-2009, 05:11 PM
Center shaft bearing or...more likely the rubber guibo joint. Or both.

Id certainly replace them as a combo, if one is bad.
I think I may be in need of a CSB and a Guibo joint!!! Arggggghhhhhhhhhh