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Power Strokes
6.0 Tech
Camshaft Piston to Valve clearances
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[QUOTE="TooManyToys, post: 1529179, member: 30841"] I probably should have added this graph earlier. It's a comparison of measurements of an OE piston protrusion and my Motorcraft reman block. The crank is going to be replaced with a stock crank, so it should be in the correct consistency. It's just amazing that someone could screw up crank grinding like this. I'm a detail guy, so this is what's driving me nuts, and by proxy why I can drive you nuts. First, I'm really trying to not do anything with these 70k mile heads if I don't have to, an expense I don't need to have. So doing the P-V checks with Colt saying it would be an outlier for the cam to not work - and my highest protrusions being in spec and my valve recession in the middle of the range has me going nuts with the numbers I'm seeing. And that's what I'm hung up on. If I thought this cam was going to need rework, I would have gone to a milder cam or stock. This just doesn't make sense to me, especially in context when you've been able to run this cam with: Piston protrusion must not exceed 0.034” measured directly above the wrist pin. Valve recession must not be less than 0.020”. Was that with Motorcraft gaskets? Because with the 0.010" thicker Felpro this should be a breeze. Unless this crank grind is so screwed up that they move the indexing not only with the last two journals but the timing as well. Sorry for the headache. [/QUOTE]
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