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      09-24-2012, 01:00 AM   #1
swamp2
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Drives: E92 M3
Join Date: Sep 2006
Location: San Diego, CA USA

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High load, high rpm whine - tips identifying this noise?

During a great weekend mountainside flogging I noticed a noise I have not heard before. Warm temps about mid 80s, four adult passengers, full tank of fuel, AC on, 8% grade. Thus at high load and then at high rpm, perhaps in the 6-8k range I noticed a clearly audible, but not loud, dullish squeaking sound. Loosely sounded like it was coming from the dash. My best guess was a belt. I certainly should have experimented with AC off but had to focus on the road! I am hoping someone else has had a similar occurrence and found the cause and fix for it.

Last edited by swamp2; 09-26-2012 at 01:33 AM.
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