bummer.
disconnect the shift cable and see if you can move the shift lever through the gears easily. make sure you feel it pass thru the detents. Then put it in neutral and see if the engine rolls over.
The #4 looks like it has rust, and thats not good. If the engine hydrolocked while under power it could have bent some connecting rods.
If you cant roll the engine over in neutral then you have to beat the siezed pistons out. Then if you have enough sleeve left to bore out its time for that.
Me, personally, I wouldnt stick another nickel in it. Replace it with a cummins natually aspirated. Way cheaper, rugged, and parts are everywhere for far less than lehmans. I am putting this one in my boat. I pet it everytime I am at the storage....
http://www.trawlerforum.com/forums/s9/cummins-6b5-9-m-diesel-29258.html
MPL
According to your first post, over a year ago a reliable mechanic told you the engine had a bad piston /cylinder. What was the recommended action at that time?
Amazing you got it to run for all this time. I think it is number 6 - very well-known failure. Lots of information on that, number 6 fails and rubs on the cylinder wall, destroying the piston and the cylinder wall. I would pull that piston out, dollars to doughnuts its only number 6 and that's why it seized.
Did you call Industrial engines? They will sell you a long block and you get to buy it with Loonies.
You still don't know if its the engine or the transmission but its rare to be that. Better find that out first, the transmission will have to come off anyway although you can haul it out with it attached. Did it overheat or just stop? Yes, you can rebuild it in place but if you haul it up into the salon it will be much easier to manipulate. And, if you get it into the salon you can just slide it out the rear door and get it done in a real shop. Or replace it.
Norman. The loons! The loons! They’re welcoming us back.
Could be a failed damper plate. The springs fail and get jammed between the plate and block. You need to slide the trans back to check it out. You just need enough room to get a mirror in there. If you have the head off and can't turn the crank I'd bet on the plate.
Have you pulled the starter. Could the gear grinding noise your son heard be the starter engaging then freezing up?
I`d put a dollar on this being a possibility. If the teeth of on the starter have jammed with the teeth on the flywheel - this could cause a lock upHave you pulled the starter. Could the gear grinding noise your son heard be the starter engaging then freezing up?
thats a crack in the cylinder of your last pic.