Join Date: Dec 2011
Thanked 0 Times in 0 Posts
Rep Power: 0
Patching a Manifold is not a good bet, they are built with an inner exhaust manifold, a water jacket ans an outer housing.
In a pinch we used to (70s) use grey marine tex and fiberglass cloth. But if the exhaust is cracked you will get water in the exhaust and could lose the engine. I bought a riser a couple of months ago, I would bet the manifold is.