okay what's the best gasket sealer to use so there's no issues of oil leaks and such after an intake manifold swap . i've heard of using the stuff called gasgacinch to help the intake gaskets seal to the cylinder heads .now what's the best permatex RTV sealant for the end rails ..... is it ?? ultra blue , ultra black ,hi-temp or the blue sealer

Actually I like the ultra grey, doesn't really stand out against an aluminum intake and seems to set up quicker than the ultra blue we used to use. (but the last batch of blue may have had issues with it)

Actually I like the ultra grey, doesn't really stand out against an aluminum intake and seems to set up quicker than the ultra blue we used to use. (but the last batch of blue may have had issues with it)

Ultra grey is my favorite, then the ultra black. There are two blues (at least) the old stuff which stunk and was a pain cause it didn't really adhere that well, and there is an ultra blue now too.

Go down to your local dodge dealer, get a tube of the black tranny RTV, stuff works great, good luck pulling the intake off again though.

I use copper cote on the intake side gaskets.

Then for the end seals. I norm buy Napa intake gaskets and it comes with a pack of gray/alum RTV and I use it for the ends.

If I'm not useing the napa gaskets then I will use ultra gray for the end seals

IMO the best silicone on the planet (aside from the silicone Miss January is sporting around that is ;) ) for intake end seals is "The Right Stuff". I've never had intake end seal leak when I've used it. It's heavier than normal RTV and makes a perfect end seal.
Even CSK and AutoZone are carrying little 1/2 size tubes now.

The blue is recommended for oil which is what it will be seein on the inside..
Hulk

Always had good luck with the blue, not so good with the black. Looked around for the gray stuff as it matches the GM factory sealant but I haven't seen it in these parts.

I've used the black and never had problems.
I've used the orange and never had problems.

DO NOT use the brown, at least the stuff I had never cured....stayed tacky forever....

I'd just use the stuff in the CHEEZE WIZ styled container. If that's what Marv is talking about, then it IS the shiznit....

I think the Right Stuff does come in an aerosol, but I get it in a tube that fits the calking gun. (the 1/2 size) you just have to be REAL carefull and get the tip sealed up GOOD between uses. And you might want to keep it off of anything you don't want STUCK together ;) It's some pretty amazing stuff.

Ya,
The Right stuff I believe is the same as the GM-S sealant. Both good stuff.

The specified colors are on the back of the Felpro gasket boxes. I bought a set of gaskets and it specifies yellow on one side and red on the other.

The Right Stuff is excellent for any sealing application, especially a hard to solve one. It's too expensive though to use in the shop day to day and can't be cost justified. We simply don't have any issues with plain ol 100% silicone for this particular application. We glue the intake gaskets to the head with weatherstrip adhesive and run a bead of silicone, plop the intake on. put sealer on the bolts and wrench them down.

I can't think of the last time we had an issue with a leak.

This may seem really low tech, but many years ago I was curious about which silicone to use, so I did some research, and found that the characteristic that make any of these products perform the way they do are inherent properties in silicone, so to save money I started using clear G. E. 100% silicone caulk. I have used this on many things on many vehicles for allot of years, and never had any problems with it. The key to getting a good seal with any silicone product is cleanliness I clean all surfaces with lacquer thinner. Another tip I have learned so you don't have to clean the tip of the caulk tube just squeeze out about an inch and let it hang to dry. Next time you use it just pull out the dried piece hanging out of the tube and your good to go.

+3 on The Right Stuff. Its the only one I look for.

I use the Ultra Grey on the end rails and the Edelbrock Gasgacinch between the gasket and head around the intake and water ports to help the seal and also to keep he gasket from moving when installing the intake.