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Old 08-22-2014, 11:13 AM   #28
bobH
Senior Member
 
Join Date: May 2010
Location: so cal, placerville, vegas
Posts: 1,394
Default Re: Tell me this noise isn't what I'm afraid it is.

I'll offer a WAG... based on events as they happened on my own 47...
burned piston(s). I had problems with pre-ignition/pinging, and eventually found three pistons with holes on top, at edge, down into the ring-lands.
With heads off, easy to see on top of pistons.
Oh, the fun
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