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I just inherited a 1978 JD 312 with the Kohler K301 in it. It hasn't been ran for a long time. I got it running and it smokes badly. It is almost blowing oil out the muffler. I've done a couple compression tests that come up great, about 120-129psi. All I can guess is the valve guides are worn out letting oil into the cylinder that way? I took off the head last night and see that it has been rebuilt before .010 piston in it. There was lots of carbon around the exhaust valve, but the cylinder looks perfect. I will take some measurements tonight, but it looks brand new? One thing I noticed that I thought was strange was the valves. While turning the engine over by hand, and the breather assembly off, I can see the valve "lifters" turning while riding on the cam? i'm guessing valve problems since I have perfect compression? Any ideas?
thanks!!
thanks!!