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      09-24-2012, 01:00 AM   #1
swamp2
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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.
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Last edited by swamp2; 09-26-2012 at 01:33 AM.
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      10-07-2012, 04:53 PM   #2
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What gears is it occuring in, I had a high pitched whine only in first gear under load high rpms, it turned out my engine mounts were broken. Once they were replaced the whining sound went away.
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      10-08-2012, 04:05 PM   #3
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I was getting this in 2nd and 3rd (M-DCT). Any idea if the engine mounts are easy to check visually without any disasembly? Thanks.
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E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK |
| Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors |
| Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels |
| XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit |
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      10-08-2012, 04:12 PM   #4
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Do you have an aftermarket pulley?
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      10-13-2012, 02:49 AM   #5
swamp2
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^ OEM pulleys. Thanks.
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E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK |
| Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors |
| Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels |
| XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit |
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      10-28-2012, 03:45 AM   #6
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Bump. No one?
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E92 M3 | Space Gray on Fox Red | M-DCT | CF Roof | RAC RG63 Wheels | Brembo 380mm BBK |
| Vorsteiner Ti Exhaust | Matte Black Grilles/Side Gills/Rear Emblem/Mirrors |
| Alekshop Back up Camera | GP Thunders | BMW Aluminum Pedals | Elite Angels |
| XPEL Full Front Wrap | Hardwired V1 | Interior Xenon Light Kit |
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