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Power Strokes
6.4 Aftermarket
Hardened valve seats.
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[QUOTE="GreenF350, post: 430971, member: 7731"] No idea in the 6.4's, but I do know that it is a semi-common problem on the early common rail 5.9 Cummins. I think it was 03-05. I know 2003-2004 had problems dropping seats (they were speculating high egt's were the cause) and to correct it people were putting 2006 and later heads on them. Anyway...I know there was a way they were staking them in on the earlier heads too, so maybe that is an option? I guess I am kind of out of my area of knowledge.....I'll shut up now. Lol. -Aaron [/QUOTE]
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