94 bonneville, 92 engine swap? - 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 06-24-2005, 04:05 AM   #1
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Default 94 bonneville, 92 engine swap?

I have a 94 bonneville and plan on swaping in a 92 engine. I know I need to change the intake manifold, and exhaust manifold. Will I be able to put the 94 (L) heads onn to keep the EGR valve?
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Old 06-24-2005, 04:52 AM   #2
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The 92 is an L, the head will fit. I'd use the short block only.
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Old 06-24-2005, 10:39 AM   #3
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You don't need the heads to keep the EGR, but the 92 heads have a lesser valvetrain design than 93-94.
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Old 06-25-2005, 05:01 AM   #4
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Should I change heads then? I bought this on ebay, and am debating if I want to do the extra work, whould it be worth it?
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Old 06-25-2005, 05:02 AM   #5
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Old 06-29-2005, 03:59 AM   #6
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I got the heads off, and there is a little buildup of carbon as well some grainy substance in the combustion chamber. What is the best way to clean this up? I dont want to damage anything, but would feel better putting everything back together shiney. Also which push rods should I use, the ones that match the heads, or the ones that match the block (I am using the heads off the 94.)
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Old 07-01-2005, 06:20 AM   #7
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The pushrods should be the same...

Use simple green and a nylon brush, maybe brass.
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