I was told by my mechanic that ya couldn't surface a 6.0 head but the guys on forum say other wise who is right . If so how much can ya take off and not be to much?
This is not right Bryan. For instance if you have to take .012 off to clean the heads up you could counter sink the valves say .006 and then take .006 off of the valve stem. This would maintain the valvetrain geometry and PTV clearance as though you had only decked the heads .006. Hope that makes sense to you. No need to go cutting the pistons.There is a reason that there are minimum tolerances for total head thickness. You not only need to cut the valves, seats and valve stems but to make sure that you don't have your valves tapping the pistons they would need cut too which would be much more costly than getting new heads if they are pitted or warped beyond the tolerance for minimum thickness.
Yeah I think once the heads have seen a few heat cycles you may as well not even check them....just send them away.I did the same thing a couple years ago. My weekends this month have been dedicated to replacing the head gaskets again and re-studding. Just sayin'......
There has been A LOT of discussion here already. I know when I was looking for a machine shop, I was told the same that the heads couldn't be machined. The fact of the matter though is that .005 of an inch is hardly enough to get all of the metal shaven on a head. The bottomline (as has been discussed and confirmed already) is that yes the heads can be machined. I recommend taking the heads to a reputable machine shop and having them checked and milled for flatness of course, pressure checked so you know everything is sealing properly, and magnafluxed for any cracks. Typically you'll have to add in a valve job with new stainless steel guides and I would also upgrade the valve springs at this point to for some extra insurance. I wish I would have done this when I did my heads back last year. I know I plan to drive my truck the way it is until either DieselSite or Stealth come out with their HPOP for the 05-07 trucks and then I'll pull the motor and built it to the hilt.So if they are flat, should I still have a couple thousandths taken off?