L26 LIM on L36 ? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-29-2009, 04:04 AM   #1
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Question L26 LIM on L36 ?

Will a L26 Series III lower intake manifold bolt right in place of an L36 Series II ? (Is it identical?) I'm looking to replace the pitted LIM on my car with a used one in very good shape if anybody has one (if its ported even better!)
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Old 10-29-2009, 07:34 AM   #2
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I don't think so, the L26 is */C right? so the heads are different, and the LIM is different

but don't quote me on it, its a little early still
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Old 10-29-2009, 08:27 AM   #3
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The L36 and L26 are both NA motors. The L26 is aluminum whereas the L36 is plastic/nylon.

The L26 is not a direct bolt on in two respects. The PCV and throttle body bolting. There are many write ups on how to make the minor modifications that I've read and overall it'* not a tough swap.

Another consideration is to plug the coolant port holes for the TB in the LIM. Much easier and doesn't require any additional purchases beyond the plugs.
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Old 10-29-2009, 09:58 AM   #4
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oops my bad, I can't think when I get on in the morning
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Old 10-29-2009, 03:20 PM   #5
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Sorry for any confusion, I meant the LOWER intake manifold. I found a L26 lower in excellent shape and was hoping it would just be a direct replacement for my L36. It looks the same and the part # for the LIM gaskets were the same, but I wanted to be sure.

I already have a APN upper intake to install, so I dont have any need to swap over to the L26 UPPER intake.

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Old 10-30-2009, 08:44 AM   #6
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The lower is a driect bolt in....buttttt unless you are cleaning up the passages or porting it. You shouldn't usually need a new one.
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Old 10-30-2009, 12:28 PM   #7
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my LIM was too pitted around where the cooling passages seal and I didnt want to take any chances.
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