The red high temp RTV silicone will last a very long time on exhaust
gaskets, especially on your block which will limit the max temp pretty well.

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Regards,
Carl Ijames

"Karl Townsend" wrote in message
anews.com...
My 8N ford tractor has a loud clatter...

I found the cause, the exhaust gasket has blown out in a small spot. The
metal in the block is slightly burned away. ( a couple years ago, I put a
new manifold on so its in good shape here) Its a flat head engine so the
ports are in the block not on the heads. And to make matters even worse
the block on a tractor is the frame support also. No way can I take the
thing apart enough to re-machine this surface.

So, do they make some sort of gasket goo to add to the manifold gaskets
that will correct this problem?

Karl