Thread: Kissed pistons
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WERK I WERK I is offline
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Join Date: Jan 2003
Location: Wisconsin
Posts: 3,291
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Quote:
Originally posted by john walker's workshop
i see that a lot on turbos. even ones that still ran well and didn't bend any valves. generally from an over-rev.
Yep,me too. My engine had the tell-tale signs of an over rev on the piston tops. The pistons had been machined to remove the protrusions resulting from the collision done by someone on a previous rebuild.
Even though a valve interface check isn't really necessary with a 964 or SC grind on these flattop pistons, you should always check your deck height on all cylinders prior to mounting the top end. You might have been on the shallow end of the tolerance.
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'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, Fikse FM-5's 8&10x17, 8:41 R&P
Old 03-26-2005, 11:17 AM
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