I see the crowd was slow to respond. I guess you could check the pitch of the EGR with another known metric bolt. I'm assuming you still have the old EGR valve handy. If you're confidant enough with that fit then gently try a bolt of the right size.
Quote:
Originally Posted by Cris
I tried another forum and came up dry. I am hoping someone has this information. I am refreshing a head on a 292 and am going to plug the EGR ports. This is a later model head with the larger thread size. Does anyone know the thread size? It is definitely an oddball. I would like to run a tap through them as the threads look a little suspect.
My guess right now is a metric pipe thread M18-1.5 ????
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