what would cause valvetrain to be i diffrent condition - 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 04-06-2006, 10:53 PM   #1
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Default what would cause valvetrain to be i diffrent condition

the drivers side valvetrain is in very good condition but the passenger side is all black and crusted. is it probably a clog somewhere, is the pump bad, is this normal for the l67? what would be the proper steps to find and fix the problem?
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Old 04-06-2006, 10:59 PM   #2
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They should be clean front and rear, left to right. I've got pics of my 93 at 110k, and it looks like 10k.

Pour oil in the heads with the valve covers off. Watch the flow. Consider an engine flush product.
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Old 04-06-2006, 11:06 PM   #3
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i already have the heads off and the engine on the stand. i am in the prosess of rebuilding it.
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Old 04-07-2006, 12:50 AM   #4
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Then use a rifle cleaning rod and bronze brush to rod out the oil passages. You may have to pop out some passage plugs. Any auto parts store will have these.
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