intake gaskets for vortec

[Pittman]

hey guys,

Looks like im pulling the damn intake off this week to replace a lifter. Ive been using gaskets from McCoy looks like a late model vortec and a 93 L35 glued together. Is this pretty much what everyone uses. This is the third time I will have the intake off. Every time I put it together it seems I get a small leak somewhere. I test in by plugging everything up and hooking up an air compressor. Never fails, there is always a small one in the intake. Im using 20lbs tq on the bolts and have checked the manifold and heads they are strait and clean. Is everyone using some sort of gasket dressing arount the intake ports or what???

 

[jwaller]

yes other ppl are using other things but the question is that the way mccoy drills the heads, he takes in to accout for the new height of that gasket stack. SO you cant use anything else... did he machine down the dist boss on the intake? if so then I believe your stuck....if not then we can take some measurements on bolt spacing and I can reccommend a gasket for you to try...

 

[Pittman]

No I didnt need to machine the dist boss. Instead I turned the dist on a lathe and bought an adjustable ring that slides up and down the shaft.

what measurements do I need on the bolts, (what height the intake has to be for the bolts to center? )

 

[jwaller]

I would be most concerned with the distance of the bolts from the bottom of the head. that is how far up on the face of the head are they. the more gasket material/adaptors you have the higher the bolts need to be.