I finally got a call from the machine shop where I took the 560D's head after the head gasket popped and I need some advice. The head is completely crack free but 6 of the valves are recessed beyond spec, and the head must have been surfaced a few times already since it is under minimum thickness at 4.220 or 4.210(need to find the notepad I had when he called). Also, the head and at least the intake manifold were ported and polished at some point prior to my acquiring the tractor. According to the guy at the machine shop the head is still nice and flat with no warps/high/low spots. I'm not sure I want to sink at least $600 into a head that's below minimum thickness, especially if it's 4.210. That being said, aside from a high pitched hissing sound when the head gasket blew, the tractor still started and ran beautifully. Knowing what the tractor ran like, I don't know if I should rebuild my current head even though it's below minimums or look for another used head with more meat on it and hopefully no cracks. Any recommendations would be appreciated.
Thanks,
Dan
Thanks,
Dan