Maybe the top lip cracked on the liner itself causing water to come in and also explain the hard spot for the rings to catch.

Here's another piece of the puzzle

I'm guessing the reason I haven't seen it is that I've never seen one run under water, maybe? I learned a long time ago you never want to say you've seen everything...but a cylinder full of water snorted up the intake would sure do that...hope nobody got hurt, that's some scary-lookin' tracks. I saw a 4010 under water, but it seized a piston & quit pumping the gravel pit out before it got wet...

Rad clogged up with alge from creek water???
Later Bob

Driver is OK, just a little bruised up and stiff where he banged up against things as it went over. It was a 4020 with a retrofitted ROPS and canopy and ended up on it's side in the big puddle below the culvert. Just deep enough to submerge the air filter cannister.

Pulled it semi-upright by attaching a winch to the top of the ROPS and then chained it to a larger tractor so I could keep it on an even keel as they pulled it out. The left front wheel got caught under the edge of the slab and bent the axle extension a bit. Ended up having to lift the front with a boom truck and pull it forward with the silage chopper while I was holding it from the right side with the left side wheels dangling in the air. Good thing the ROPS was strong enough to hold it.

Will try to get pictures of the postmortem on the engine. We'll fix it, just can hardly afford to be one tractor down right now. I was irrigating some sorgum I planted yesterday and the engine mounted GormanRupp pump broke ANOTHER pump shaft because of some trash caught in the impeller (I guess), so now I'll have to run the PTO drive pump with another tractor, but luckily I can use a larger tractor like a 5020. There's one sitting still right now that I can chock the wheels so it doesn't roll off in the lagoon

Things were really going well chopping silage, this first week, we had a couple of days we put in around 85 loads and another day over 70, with no real trouble other than a bunch of flats on silage wagons. Unfortunately the honeymoon seems to be over:p

I expect this accident had a lot to do with it being Friday afternoon AND the driver being the youngest on the crew. There was some talk that the engine had died and that's why it went in, but I can say for certain the engine was running when it went in:D

Just picked up on the tight every 180* thing-you've got a bent rod, too...

Yep, already know where to dig for a spare rod, but I'm afraid there might be more than one from the Vesuvius like eruption that came out of the cylinders through the injector bores when I rolled it over with the starter a few revs. Lots of oil from it being on it's side for an hour or so, but water too.

I'm glad the lad didn't get hurt worse than he did. If he's just bruised and shaken up, that's not too bad. I've seen guys try to hop off rigs when they went over and it seems most try to get off the low side. .not many make it all the way!

Hopefully it's just one rod and not a twisted crank. With the gasket being extruded like it is, I wonder if it might have tweaked the head too? I've never seen a diesel try to digest water but I have seen what happens to gas engines in boats. .not pretty!

Just a very late update on this topic............

New (used) connecting rod, piston rings and rod bearing in that one cylinder that had the bent rod/extruded head gasket, a new head gasket and she's good as she was before the leap into the puddle.

Turns out the cylinder surfaces looked almost like new, no ring groove and some crosshatching still visible, so we didn't disturb the other 5 cylinders, just not worth it.