What is the best gasket sealer u can buy for the front and back of my instake manifold I want no oil leaks and also if u know a good procedure how to do it the best way please chime in

 

RTV with the fel pro kit is good, apply the bead an inch up on each side on the intake manifold gaskets, let it dry for atleast 12 hours and your good.

 

Yup, what he said. I used the copper RTV. I was doing a major re-working of my car so the RTV had a long time to set up before use. I've got no leaks now.

 

Well, this has been discussed about a million times on this, and other, forums.

The correct material to use is the GREY RTV. It's got the correct heat capabilities and, in my opinion, works better than the other options. The real secret is to apply the sealer to the cleaned block, set the manifold down on to it without moving it around, torque the bolts to spec and DO NOT START THE ENGINE FOR 24 HOURS. This allows the RTV to cure and get rid of the cure product, acetic acid. Clean the block and manifold mounting surface with acetone last...use whatever you need to remove the old silicone and gunk that's there.

I believe most guys have problems when they start the engine before the cure is complete.

You can continue to assemble the engine after you torque the manifold down...that won't interfere with anything.....

Good luck!

 

Awesome thank you guys

 

According to Permatex Grey RTV is good to 500 degrees, Copper RTV is good to 700 degrees.

 

If the manifold gets to either of thise temps, the engine is toast anyway. There are other reasons to use the grey and not the copper. It doesn't matter either way to me..use what you like. You might note with interest that GM specifies Grey RTV for this application......

 

Maybe because the copper is overkill. Either way, it won't hurt.