I recently bought a ported and polished L36 LIM, and I'm just going over it once, mostly cleaning off some dirt and grime. (Not much else to do. Justin did a great job on this.)

One thing I noticed was a worn gasket. Rectangular thing, just behind and below the thermostat port. (See attachment.) What'* that called, and is there a premade gasket or do I have to squeeze my own?

I don't see anywhere you could buy the gasket itself. But I noticed on rockauto that the intake plenum gasket kit comes with the gasket you need. $33 for your year.

It'* called the coolant manifold gasket. I'm not sure of the part number and can't find it alone anywhere. If you're swapping LIM'* you'll need the gasket kit anyway

Stop in to a dealer. They usually have them. Cheap too.

They sell that gasket at ZZP, if your planning to order other stuff, just order it. If that'* all you need, go to a dealer and save the shipping.

Thanks! I don't have immediate plans to swap in that new LIM, but I'll definitely keep RockAuto and ZZP in mind when it'* time. (ZZP calls it the intake manifold end cap gasket.)

That kit, metal LIM gaskets, and a set of coolant elbows are all I need for a LIM swap, correct?

And RTV silicone to do the LIM gaskets

IMO, I wouldn't get LIM gaskets from ZZP again. They didn't fit properly. Not sure how that'* possible, they didn't and I had two engines in pieces at the time.

GM'* fit great on both. ZZP'* didn't sit right on the end seals, felt different......cheap.

I used ZZP ones on mine and they seemed to fit fine but then again there may have been a minor detail I didn't noticed since I do have a very limited experience with cars.

It was the end seals on the ones I experienced. They bowed up and wouldn't stay in the pin holes. Made it difficult to get the LIM situated properly while trying to use a third and fourth hand to hold them.