I purchased a Case 446 with a blow by issue. I was only going to use the pto, 3pt hitch and tires the decide what to do about the motor. Any way I decided to go ahead and rebuild it. I got the motor out disassembled it and was surprised at what I found! I'm wondering if any one has seen any thing like this before. It looks like the piston was repaired and put back in. The std pistons and rods look new to me.