Exhaust manifold sealant

[jack350]

Would you use a sealant on the manifold gaskets and if so what is recommended?
Phil

[simonwedge]

I've never used any and not had any problems with sealing. Just make sure sure all surfaces are rubbed down and clean.

[whitewolf]

If you want to then you'll want RTV silicone.

I'm using it on my manifold faces and joints. Its high temp and also has the TVR letters in its name!

[jack350]

Thanks guys
Phil

[adam quantrill]

Rev uses silicone too but I worry if it is durable enough - I expect 20k out of my manifold gaskets as a minimum.

I use "exhaust assembly paste" which is a white sticky goo (Stu - down boy!) that solidifies slowly in air and expands a little on heating to seal any uneven gaps.

[pwd95]

On my 450SE the heads were ported very wide so the walls that the gasket sealed against were very thin. The only way I could seal them properly was to double up with big bore gaskets. I also had to re-tighten the bolts after every heat cycle for a few weeks.