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RenoE92M3 · 11-21-2012, 12:16 AM

Without taking it apart its all just speculation but it sounds like piston slap. Its not heavy like rod knock sounds too slow and low pitch for valve train.

11-21-2012, 12:16 AM	#6
RenoE92M3 Private 8 Rep 85 Posts Drives: melbourne red e92 m3 Join Date: Apr 2012 Location: Reno/Tahoe iTrader: (0)	Without taking it apart its all just speculation but it sounds like piston slap. Its not heavy like rod knock sounds too slow and low pitch for valve train.
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