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carrera turbo carrera turbo is offline
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Join Date: Jul 2008
Location: ALASKA
Posts: 1,508
This isn't your nomal knock it's a single knock like a valve closing or opening? I think RSR hit it on the head. I'm crossing my fingers on this.

Before I got my 3.3L Turbo engine, my 911 was a "standard" 911, with a normal 3.0L

One day at the stop light I heard a thump-thump-thump...WTF? I didn't know it, but I spun a bearing at the crank.

I highly recommend not driving it anymore until someone in the know can actually hear what the problem could be something as "small" as the fan housing/alternator going south, or loose, or something much more major.

Good luck!
Old 09-16-2010, 10:47 PM
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