Was starting my old tractor the other day. Got it going and when I put the air intake hose on it sucked some water in (No clue how water got into much less filled up the filter box) and it stopped before I could pull it off. Last time water got into it I just hit the decompression lever turned it over a few times and back in business.
Apparently not so lucky this time! Sucker is locked up tight! took the head off and tried to crank, no luck. next tried to turn the engine over by putting a pipe wrench on the PTO and turning it over (with the head off) and ended up breaking an 18" aluminum pipe wrench into 3 pieces, still no movement.
I'm thinking (hoping) a bent rod is all I have since the pistons are in the correct positions (one at top of cylinder, other at bottom of cylinder) but it ain't moving at all. Doesn't appear to be anything sticking out of the block or any cracks. What else can cause it to stick like that?
If it helps, the tractor is a 1970's Yanmar 2210D diesel with a 2T90 engine. everything I've read about these rigs is that they are dang near bulletproof and fairly easy to work on due to their simplicity