E36 M3 Low Pitch Knock - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 01-05-2009, 06:43 PM
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Angry E36 M3 Low Pitch Knock

My M3 has developed a low pitch knock that follows engine rpm. It appears to be coming from left side/rear of the engine. Any ideas?
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#2 (permalink) Old 01-06-2009, 03:09 AM
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Knock sensor on its way out??

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#3 (permalink) Old 01-06-2009, 08:37 AM
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Knock

Shouldn't that throw a code?
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#4 (permalink) Old 01-06-2009, 08:39 AM
OMFG another one!?
 
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Can you tell the difference if it's an engine internal knock or something in the engine compartment that might be loose?

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#5 (permalink) Old 01-06-2009, 01:16 PM
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hmm...if its internal it could be piston slap. Thats usually a low pitch tone. Can you tell if its towards the top or the bottom of the engine.
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