Reply to "351C factory heads, can valve guide cracks be repaired by complete removal of the iron guides and pressing in thick-wall bronze guides?"

George PAdmin.

On the intake side the answer is definitely yes. I've seen guys do it intentionally. There's very little risk.

On the exhaust side I'm a little hesitant about complete removal of the iron guide inside the exhaust port, exposing the bronze guide to the exhaust gases which can run up to 1000 degrees F. I have no experience however.

6/6/158:29 PM

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