1992 SSEi Lower Intake Manifold Replacement - Options?

[93celicaconv]

I came across this information in a previous thread. But here is my situation. I have a 1992 Pontiac Bonneville SSEi. I am the original owner. I had a LIM leak (between the LIM & Heads). When working on it today, I discovered a previous repair (likely by a dealer) when they put in a replacement thermostat a long time ago - had lots of sealant around everything. When taking it apart, there was a lot of corrosion in that thermostat seat, and pitting all over. I can see why someone tried to make it work now. There was also a problem many years ago getting that heater pipe that goes into the front of the LIM (pipe has an o-ring and is held in by a bracket), and that also had a lot of sealant from a previous repair.

Anyway, there is enough corrosion there that I don't want to put this LIM back in. Of course, there is no dealer option to put a new one in. I went out to the salvage yard and found 2 possible LIM's, but both were from 1995 vehicles (one an SSEi, the other a Buick Riviara) The one in the 1995 Riviara has a black coating on it, while the one on the 1995 SSEi is silver, just like my 1992 is. I know the 1995 SC'd vehicles had a somewhat different Eaton blower on them, but the LIM looked a lot alike. I don't want to go to the trouble to remove one of them to find out it won't work. Any inputs if a 1995 LIM will work in a 1992 application?

My LIM GM part no. is 24501562. I don't know what the 1995 LIM's GM part no's are, but I think they are 24502302, from what I could barely make out with them installed. I don't want or need the 1995 SC's, as I know they won't work properly in my 1992. Just want to know if the LIM from a 1995 is identical to my 1992 LIM.

Interesting find here. I have four lower intake manifolds here:

1992 SSEi, salvaged by BillBoost and Pat
1993 SSEi, stock LIM on the Zilla, heavily modified
1995 SLE, stock LIM on the SLEeper
1995 ???, salvaged by LakevilleSSEi

The 92 looks just like my 93. The 95 Nate sent me has a crack running down the 'hump' on the inside of the LIM. This is very likely why the LIM was horrible inside. Coolant leak. Probably also why the ignorant former owner removed one of the ECT sensors and installed a plug. They never knew they were overheating.

Aside from that, there are some REMARKABLE differences between the 92/93 and the 95. However, all the older part numbers have been obsoleted, so it wasn't a MODEL change, but rather a part improvement that obsoleted previous units.

LIMs are marked as such:
1992 SSEi, 24501562
1993 SSEi, 24502104
1995 SLE, 24502302
1995 ???, 24502302

24502302 is the only valid current part number.

[J Wikoff]

There are two versions of the 92-95 L67 LIM. In 94 they added some interior baffle walls that seem to smooth out intake noise. I've had both on my car and that's the only difference I noticed. They are swappable.