Exhaust manifold sealant?

[72LC]

I had my intake/exhause shaved and there are still some pits on the exhause side... can't be shaved any further, so I was going to put some type of sealant with the gasket. Looking for suggestions.

What brand/type?

What temp does the exhaust manifold get up to typically? 1972 F engine.

I found stome stuff that is around 700 deg F intermittent rated. would that work?

Thanks for looking.

 

[apeterson]

do some searching and read about remflex gaskets, they might be able to solve your problems.

 

[I Tried]

Use the Orange high temp silicone. I have used that on manifolds for years with no gaskets and never had a problem. I have used it on turbo charged diesel pulling trucks seeing high back pressure and 1500 degree EGT temps and all was good.

 

[71-CRUISER]

Ultra Copper

 

[Pighead]

Ultra Copper

Yup, the copper stuff that comes in a can with a brush in the lid.

 

[craptabulous]

i have used the copper silicone with good results on my dirt bike , if i don't ride fast enough the header glows on it so i would think you would be alright using it on a landcruiser .

 

[spotcruiser]

Remflex.

 

[FJforty]

My $.02. I would use the Orange high temp silicone RTV. Easy to apply and remove when needed. Apply a thin even coat and fill the pits. You don't need a thick coat, the surfaces should be within a few thousands.

 

[3DAMAN!]

I have always used the RTV ultra copper in the 3 oz. tube. Takes about half a tube. The next set of headers will be sealed with a Remaflex heavy thick gasket.

 

[Splangy]

I would skip any sealant and go with the remflex.

 

[72LC]

Wish i'd have known about the remflex gaskets before I bought this other. I think I am gonna go with the orange or copper and if that doesn't work I will try the remflex next time.

Thanks all for the replies.

 

[FJforty]

The Remflex looks good. I had an aftermarket gasket from a kit so I put a ring of RTV around the intake ports only.

 

[bigezvol]

Remflex not sealing around one front exhaust port at the header for me. Gonna give the ultra copper a try and hope this does the trick.