Blown head - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 02-22-2008, 07:01 PM   #21
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Ouch.
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Old 02-22-2008, 07:03 PM   #22
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any ideas on how or why this happened
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Old 02-22-2008, 07:18 PM   #23
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I would guess you have a broken valve and/or valve spring

Is your valve cover cracked? (Like maybe from a piece of the valve train hitting it on the inside)

Were there any metal bits in your oil? (Piston pieces from piston contact on broken valve)

As a start, you should pull your valve cover, to see if one of your valves has come apart and/or a valve spring is broken.
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Old 02-22-2008, 11:49 PM   #24
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Oh, my gosh!
Probably no bearing on this one, but the last time I experienced a plug like that was in my Yamahammer after it burnt a hole in the top of the piston. (Was running lean)
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Old 02-23-2008, 11:30 AM   #25
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I've done that a few times. Any chance that particular plug is platinum? If so, get it out of there. Never use plats on a supercharged engine. Copper or irridium only.

That plug could have done that for a dozen different reasons. So how about giving us more specifics on how old it is and what brand, model, and type it is?
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Old 03-18-2008, 05:26 PM   #26
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hey i finally got the car fixed, i had a huge hole in my piston the one that had the bad plug. when it was all said and done the cost was a bit over $600 for parts and my dad did all the labor. runs great now. thanks for all the input and help offered.
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