Sorry to be pestering about this same issue for about a month now i think, but it's almost gotten the better of me. the issue is this glowing exhaust manifold on a 6 cylinder 2.6 litre series 3 rover. just a quick recap, i have rebuilt the carby and distributor, and put a new exhaust on it this morning.
i took the exhaust manifold off this morning to replace the manifold-to-engine block gasket. while giving the manifold a bit of a clean, i found a small crack in it. i sprayed some oil into the manifold which seeped through and was visibile on the outside, so it is definitely letting air into the exhaust. first question:
is this likely to cause the excessive manifold temperature and the backfiring during decelleration?? (i am fairly certain the answer to both is yes, but just want to be sure)
secondly, how do i fix this? i had a crack at arc-welding it with a standard rod, but this just ate away at the manifold and didn't fuse with the electrode metal at all. i stopped before i did to much damage. will i need it professionally welded (mig or tig or something or other), or can i fill it with exhaust glue or some such.
I think i have just about cracked the problem that has been buggin me for over a month, and i can't thank you guys enough. hopefully this will be the last question you'll hear from me for a while.
Thanks in Advance.
Samuel.