92 aluminum upper intake gaskets
 

I pulled the upper intake on a 92 with the aluminum upper and didn't see a gasket. It looked as if were sealed with Indian head sealer???? I thought about getting a gasket but then what about the two o-rings in the front? the gasket will lift the intake and the o-rings may not seal. I looked through the posts and didn't see anything about it. The engine is about ready to go back into the car and want to do what I can with it on the ground.

You found an aluminunm 92 upper? Sweet. Know where to get another?

If it's like the 93 plastic (which I assume it would be), you're supposed to use a chemical to get the old sealer off, then apply a 1/16 inch bead of Loctite Instant Gasket Eliminator GM P/N 1052942 or equivalent to lower manifold mating surface. Make sure to circle all bolts. Tighten upper manifold bolts to 30 N*m (22 lb. ft.)

I'd bet the torque is different because of the material differences. And my book makes no mention of O-rings for the coolant passages.

Thanks that helps.
This was the first aluminum intake That I have see on the 3800s Was glad to see that it wasn't plastic myself.

Please note there are no EGR passages, therefore it won't work on any other 3800's other than the 1991/92 L27, without some modifications (or should I call it a complete elimination) to the egr system on the 1993-1995 L27's. Also, the TB opening is smaller. Might be some other difference's, but these are two things that Allmachtige and I came up with when we were considering swapping 1991/92 aliminum upper intakes onto our 1994 L27's.

Who needs EGR? You could always port match the upper to the TB.