Here's the good, and the bad (or ugly)
This is a coolant passage on my 690 heads. Looks like they were epoxy sealed or something. It's pretty hard stuff, it won't easily flake off, but now I'm worried. Buying another set of heads isn't in the cards unless I know these are bad. I don't know the prior history either.
Any suggestions? Did someone do the hardened seats and have a leak? Should I just go for it and hope for the best? I had my machine shop and builder go thru the heads including machine work and we only just noticed it now in final assembly. It's really only this one port where it is separated slightly from the casting
This is a coolant passage on my 690 heads. Looks like they were epoxy sealed or something. It's pretty hard stuff, it won't easily flake off, but now I'm worried. Buying another set of heads isn't in the cards unless I know these are bad. I don't know the prior history either.
Any suggestions? Did someone do the hardened seats and have a leak? Should I just go for it and hope for the best? I had my machine shop and builder go thru the heads including machine work and we only just noticed it now in final assembly. It's really only this one port where it is separated slightly from the casting
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