Sealing Manifold Gaskets???

Posted by Packard Newbie On 2019/1/12 13:49:23

As I reassemble my 245 CID block and go to reattach the manifolds, I am curious if there is a need to seal the gaskets, especially the intake, with any high-heat sealant???
I have put a straight edge across the machined surfaces of both castings and they seem very true. I presume the correct procedure is to reattach them with the manifold-to-manifold bolts loose, snug up the head attachment surfaces and then tighten the casting attachment bolts. When I disassembled the motor, I did notice what looked like black silicone on the intake gaskets. I realize that a perfect seal is crucial, particularly with the intake, and am wondering what convention dictates here??? Maybe just the new gaskets properly torqued are sufficient?? Thanks to any willing to share.