Posted by jdbrad1 on September 25, 2009 at 05:57:47 from (216.116.87.110):
I have a 58 340 that I have rebuilt and had head work done on it twice, but it still smokes. First round I found that the shop that did the head work did not put on the umbrella seals on the valve, just o-rings. So I pulled the head and took it to a different shop (one that knew about tractors) The guy there told me he could tell that the engine was burning oil but that it was not caused by the head. So while I have the head off I dropped the pan and pulled the pistons to check the rings. All of the rings looked good and where on correctly, I also made sure that the rings were 180% out for the top and second compression rings. Another thing that I discovered during the time that the head was off the second time was that the thermostat was not seating correctly in the housing. The retaining clip had come loose and was letting the coolant past. So the tractor never got to full running temp. My question is what type roll does the temp play in allowing the rings to seat? Also what should the running temp of a 340 be? I have been told 160 to 170
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