Tips on filling Exhaust Crossover

[Rich Biebel]

Originally Posted by ss3011

Thanks for the information . That early post has lots of good info. It looks like depending on how the exhaust flows, and how much heat transfer you get in the port, will determine what material you can fill the crossover with. Zinc alloy melts at around 750 degsF, and aluminum melts at around 1220 degsF. I think I will try melting down some old pistons, and see how that pours into the crossover. Thanks again !

That is how we did it in the shop I worked at. Melted old pistons down.... Used a big plumbers ladel for melting lead with a torch. It had a long handle....Melt pistons.....remove slag while it's liquid as it will form on the top.....

Pour in with intake flange facing down and a plate bolted on it to keep the aluminum flush. Aluminum will get solid very quickly. You can warm the head up some before pouring the molten aluminum in.

It's tricky.....and there is zero working time there....

If you pour too much in you will have to use a die grinder to grind it back....

I have seen some furnace type cement used that held up very well but never knew what product that was or where to get it....