On my 460 I have a set of aluminum exhaust manifolds that have the snails mounted above the middle of the manifold and not at the end like some I have seen. These have both been welded at one time or another and I believe that I have one side leaking still cause I am getting water in the exhaust ports and some water leaking past an exhaust gasket.
I was told that these were made by Harmon Marine but I haven't found any name on them yet. I suspect that I am going to have to replace at least one and maybe both. the Snail is bolted to the top of the manifold. so, first question.
1. How do you leak test these things? I put pressure to the engine with the manifolds off the engine and I am 90% sure that the water is not getting into the exhaust ports due to any engine cracks or gaskets. Also no indication of significant water in the oil.
2. where would you find a single or pair of manifolds like these for sale?
3. How come I wasn't smart enough to take pictures before I started asking questions? :hammerhea