Posted by rustyfarmall on March 13, 2020 at 13:25:43 from (67.55.174.159):
In Reply to: Valve job posted by Gary Mitchell on March 13, 2020 at 08:27:19:
I own a Black and Decker valve grinding machine, and a couple of valve seat refacing machines. I know how to use them, but the valves from a 60 to 70 year old tractor are usually too far gone to be ground, however they CAN be turned in to razor sharp cutting tools. Valve seats are the same way. By the time you get a good, clean mating surface for the valve, the valve will set so far down into the head that it just won't work. Only solution is for a good machine shop to cut out the old seat and install a new one.
So new seats, new valves, new valve guides, and the labor all adds up quickly.
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