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WERK I WERK I is offline
Forced Induction Junkie
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Join Date: Jan 2003
Location: Wisconsin
Posts: 3,302
Originally Posted by Alan L View Post
If the guide itself is loose, that would be different.
My SC had worn guides, and valve stems (200k+ km) - I replaced both. One guide was cracked and ready to drop into engine. But the engine still had no noises.
Weird it would fail like that - old valve stem in new guide?
A few things could have caused the valve guide to prematurely fail. Bad materials, faulty guide insertion technique, bent valve(slightly), piston/valve contact during cam timing, misalignment of valve guide to valve seat, or valve/guide oiling failure (spray bar clog).
I know Don used the best materials and builders in his engine after seeing his build posts. That engine is a work of art!
'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 11-03-2008, 06:41 AM
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