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Lead substitute beneficial for heads without hardened valve seats? 120-130

posted by  Deluxe on  Mon Jun 2 07:45 CST 2008
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last visit: Fri Sep 25 07:10 CST 2009
[RELATED]

A '74 F head run for approximately 60k miles undergoes a 3-angle valve job and is put back into service without hardened seats for approximately another 10k miles. The head is now off the block and the valves (just by looking at them from their top since they are still installed) seem to be sitting pretty high and not sunken down into the head material. I'm thinking of just cleaning up the head, replacing the stem seals, and putting it back into service. Would lead substitute help to 'self harden' the recently ground valve seats once this thing is running again?

Deluxe






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