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Old 12-17-2012, 06:15 PM   #41
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Join Date: Nov 2011
Location: Melbourne, Australia
Posts: 331
My Ride: E46 330i
I'm not sure whether you can completely rule out water pump. Granted the M water pump is much better than non-M, but it can also fail. There are reports on non-M pumps that the impeller is loose so it may fail intermittently. Best bet is to take it out and inspect it.

Last edited by TonyJ; 12-17-2012 at 06:16 PM.
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