Molon_Labe 731 #1 Posted July 13, 2014 A while back I bought a C-111 with a very tired transplanted K241 in it. You could use it to fog for mosquito's, seriously. Still the price was so good I couldn't pass it up. I pulled the head and couldn't believe the clearance between the piston and cylinder, it looked like someone put a standard (and it was marked std.) piston in a .020 over bore. Pic below. The bore measured .00025 over factory with practically no ridge. I have rebuilt everything from Lausons to Minneapolis Molines and have never run across anything like this before. Any insights? I proceeded to replace the piston/rings/rod/seals and the tractor runs like a new one but I just can't wrap my head around what lead up to the piston damage. Share this post Link to post Share on other sites
Molon_Labe 731 #3 Posted July 14, 2014 It got hot Hot enough to flame cut that section of piston! Here's another view of the piston while it was still in the block. You can see the top compression ring. Share this post Link to post Share on other sites
Fordiesel69 271 #4 Posted July 14, 2014 Normal, the carbon ridge just cut away the top of the piston. The rings also loose tension, and get worn over time, as well as plain use. There is no way to tell how many hours it had. I find that sometimes a 250 hr decarbon interval is needed. Share this post Link to post Share on other sites
