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Power Strokes
7.3 Aftermarket
Mahle piston tolerances ?
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[QUOTE="Zeb, post: 1533543, member: 30304"] As far as what I do with the lip, I put them in a lathe and push the lip back, then change tools and under cut it (the lip) to blend it into the current bowl wall. I want the lip to look like it did originally, just closer to the bowl wall so that the opening into the bowl is larger. If you don’t under cut it, you end up with a tall vertical wall on the lip and that pretty much defeats the purpose of trying to keep some of the lip there. On the ceramic coat on the top of the piston, it comes off very quickly. I can’t see how it prevents heat sink thru the crown when it’s not there. A friend tore down a 6.4 after 3,000 street miles that had ceramic coated pistons put in it, and you couldn’t tell they had ever been coated. Yes, I saw them before the pistons were put in and they were coated. I have heard that over and over again from guys that have put in coated pistons and then tore down the motor soon afterwards. That is why I consider it a waste of money. [/QUOTE]
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