I have a 450 tractor inherited from a relative that has been in the shed for 10 years and not run. I have started restoring it and have found that the engine has not had good maintenance. I found some marks in the #4 cylinder wall after pulling the sleeves. The piston in #4 had a broken oil ring but the sleeve is not cracked, just scored from the broken ring. Most of the discussions on this forum discuss cracks in the block that are easily found. I am not sure if the cylinder is cracked or if the lines are score marks from another sleeve job. I could not see any sign there was a leak along the marks and the radiator was full of antifreeze when I pulled he head. If anyone could tell me if the cylinder wall lines are typical of a crack I would like to know your thoughts. I would like to avoid pulling the engine and am thinking about going the JB weld route. The pictures show the lines in the block cylinder wall (sleeve removed).
