Aluminum Frame LIM gaskets for Series II pix (56k warning) - Page 2 - 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 03-06-2006, 10:56 PM   #11
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Yea those are the ones i got when i did my UIM/LIM. I just assumed that'* what everyone used... they did seem like a very solid design however.
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Old 03-07-2006, 01:39 AM   #12
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Quote:
Originally Posted by Logan
So where exactly was it that the old ones failed? (Never seen pics so clear)
Here is a typical example - this pic swiped from Jr's3800 recent UIM/LIM fix:
http://www.bonnevilleclub.com/forum/...lim+gasket+pic

The plastic frame around the coolant passage distorts and the seal eventually is lost.

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Old 03-07-2006, 02:25 AM   #13
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Default Re: Aluminum Frame LIM gaskets for Series II pix (56k warnin

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Originally Posted by bill buttermore
Can't remember these pins. Do all Series IIs have locating pins on the cylinder heads?
In December my UIM went in my 97SE. From this thread:
http://www.bonnevilleclub.com/forum/...ic.php?t=44637
I got that same part number and gave it to my dealership. They ordered that gasket, and determined that whatever the deal is with the pins, they weren't compatible with my engine. I'm not sure exactly what the pins are or where they're supposed to go, but they didn't work with the rest of my engine, so they had to use whatever gaskets people used before these came out.

So no, apparently not all Series IIs have locating pins on the cylinder heads.
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Old 03-07-2006, 02:32 AM   #14
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Bill Buttermore and BigNews1

Thanks for the excellent pictures.
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Old 03-07-2006, 10:57 AM   #15
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Default Re: Aluminum Frame LIM gaskets for Series II pix (56k warnin

Quote:
Originally Posted by Bugsi
Quote:
Originally Posted by bill buttermore
Can't remember these pins. Do all Series IIs have locating pins on the cylinder heads?
In December my UIM went in my 97SE. From this thread:
http://www.bonnevilleclub.com/forum/...ic.php?t=44637
I got that same part number and gave it to my dealership. They ordered that gasket, and determined that whatever the deal is with the pins, they weren't compatible with my engine. I'm not sure exactly what the pins are or where they're supposed to go, but they didn't work with the rest of my engine, so they had to use whatever gaskets people used before these came out.

So no, apparently not all Series IIs have locating pins on the cylinder heads.
Hmmmm. Ben was sold the aluminum ones for his '97 SE, but you were told they would not work on yours. This may be a little tricky to figure out.
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Old 03-07-2006, 11:04 AM   #16
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I think they are all the same design.. the locating pins merely hold the gaskets in place on the heads better.
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Old 03-07-2006, 11:10 AM   #17
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We finally have visual P/N confirmation on these. Thanks, youse guys!
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Old 03-07-2006, 02:18 PM   #18
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Default Re: Aluminum Frame LIM gaskets for Series II pix (56k warnin

Quote:
Originally Posted by bill buttermore
Hmmmm. Ben was sold the aluminum ones for his '97 SE, but you were told they would not work on yours. This may be a little tricky to figure out.
Exactly. It looks the the deciding factor is the cylinder heads. At some point in production they must have changed. I wonder if the compatible cylinder heads are the "Pre 1997.5" or "Post 1997.5". I'd guess "Post" but we need to nail this down if we can.

I'll leave open the possibility that my dealership lied to me, although it looks like they were pretty specific about their reason why the gaskets would not work on my car. If it'* just a matter of holes for locator pins, I wonder why GM doesn't make two versions of the aluminum gasket, one with pins and one without?
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Old 03-07-2006, 02:40 PM   #19
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Default Re: Aluminum Frame LIM gaskets for Series II pix (56k warnin

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Originally Posted by Bugsi
If it'* just a matter of holes for locator pins, I wonder why GM doesn't make two versions of the aluminum gasket, one with pins and one without?
THAT, I think is a very valid question. I would tend to believe that these gaskets will fit them all, since it'* well known that the LIM gasket issue is more widespread than pre-'97.5

The thing we will have to try and verify is the differences between the earlier and later S2 3800 head-to-LIM mating surfaces. As other members do their gaskets, we'll have to remember to ask for specific pics.
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Old 03-07-2006, 02:45 PM   #20
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Corvettecrazy used 2nd design (w/pins) on his 96
I used them on my 97

I think that dealer that didn't give them up was smoking something...
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