Head Fitment - 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 05-17-2008, 11:33 AM   #1
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Default Head Fitment

Do L36 heads work on L67s? The heads are from either a 95, 96, or 98. They would be going on a 97.
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Old 05-17-2008, 11:46 AM   #2
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No, L36 heads don't have injector bosses in them. L67 injectors go into the heads, not the LIM. This is necessary due to the width of the M90.
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Old 05-17-2008, 12:01 PM   #3
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Default Re: Head Fitment

Quote:
Originally Posted by glorkar
Do L36 heads work on L67s? The heads are from either a 95, 96, or 98. They would be going on a 97.
The castings are the same, but as wilwren just stated, the pockets for the injectors are not drilled on an L36 head.

If you have the tools and the time, you can add the pockets for the injectors, since the material is in the casting. You need a drill press big enough to handle the head. The injector pockets are in there at an angle and you need three seperate steps for each injector pocket. (Main hole drilled through to the intake port, then counter-bored for the O-Ring seat, then chamfered at the top to aid in installing the injectors.)

If you are not equiped to do this yourself, then it would be cheaper to buy the L67 heads with the holes already present in the heads.

While a little shady and underhanded...you can buy remanufactured L67 heads from your local auto parts store and turn in the L36 heads as the cores.
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