My stock exhaust manifold's heat riser/flapper works fine. Had the manifolds blasted, cleaned up, and treated with a coating. And of course I put the manifolds back on and just now putting the bi-metal spring on. I can figure out which way to put the spring, if I just knew what direction opens or closes the valve. Does anyone know off hand which direction it should rotate when warmed up?
I can't believe I did this again. I'd hate to pull the exhaust pipe off to look up in there. Any help appreciated.
I can't believe I did this again. I'd hate to pull the exhaust pipe off to look up in there. Any help appreciated.