Tractor might be shot - now working on compression testing and have questions

[Omnipotent]

The issue is the piston top is not "pitted" it's actually metal that is melted/bonded to the piston. I might be able to grind down the piston to smooth it out somewhat, but I think I'd be looking at a problem later down the road.

 

[orezok]

I would be concerned that the amount of “beating” the piston took, there could be a crack (future failure) or the wrist pin bosses are damaged and next time you might have a hole in the block. You need to replace the piston.

 

[etpm]

I would be concerned that the amount of “beating” the piston took, there could be a crack (future failure) or the wrist pin bosses are damaged and next time you might have a hole in the block. You need to replace the piston.

Also, because of the way he piston top was hammered, the top ring groove may have been compressed, which would prevent the top ring from expanding freely in its groove. There is no way I would try to use that piston again unless another was not available. And if not available then I would make sure the top ring moved freely in its groove. I completely understand the desire to not spend money where it may not be needed. But this is a case where replacement now is a good way to not spend more money and time later. And maybe not much later, like minutes of operating time. I think the best place for that piston is for show and tell.
Eric

 

[Omnipotent]

Maybe it's easier to just jack up the front of the tractor and drop the front axle an inch or three? Might not even need to disconnect the steering hoses or linkage, if you're just looking to buy a few inches.

After looking at all options available, I believe this is the route I will take. Looks to be 8 bolts and steering hoses (possibly) and that should get me the clearance I need, worse case, I roll the axel out of the way; best case everything stays put and I gain access to the screws I need and pull the pan.

I'll be back with results.

 

[Omnipotent]

So front axle removed and slid forward however oil pan was still a PITA. Essentially, the impeller shaft "I guess you'd call it that" that runs to the rear of the tractor interferes with the oil pan by like 1/8 of an inch. Using a pry bar I got it out (without ruining the pan or shaft), not sure if it will go back in or if I will have to trim it a bit, but got it out, removed the piston and sleeve and crank all look good, so just a new piston, rings, bearings (figured why not) exhaust valve, gaskets all over, cylinder head bolts and either new cylinder head or machined (still need to take it to the machine shop) but other than that, it should go back together pretty easily (famous last words I know).

In any event, work will be busy this week, so probably no new updates until next weekend (if I'm lucky).

JD

 

[boomer1025]

So front axle removed and slid forward however oil pan was still a PITA. Essentially, the impeller shaft "I guess you'd call it that" that runs to the rear of the tractor interferes with the oil pan by like 1/8 of an inch. Using a pry bar I got it out (without ruining the pan or shaft), not sure if it will go back in or if I will have to trim it a bit, but got it out, removed the piston and sleeve and crank all look good, so just a new piston, rings, bearings (figured why not) exhaust valve, gaskets all over, cylinder head bolts and either new cylinder head or machined (still need to take it to the machine shop) but other than that, it should go back together pretty easily (famous last words I know).

In any event, work will be busy this week, so probably no new updates until next weekend (if I'm lucky).

JD

I would also replace the connecting rod.

 

[DarkBlack]

Plus you need to replace that bent intake valve pushrod, and replace at least the missing exhaust valve seat, if not all valve seats, if you’re re-using that head

 

[grsthegreat]

Man, i feel for you. I used to rebuild gas engines years ago with my brother. Never tore into a diesel engine before. Something like this would be above my pay grade (comfort zone).

 

[Omnipotent]

Plus you need to replace that bent intake valve pushrod, and replace at least the missing exhaust valve seat, if not all valve seats, if you’re re-using that head

Good point, forgot about that one...thanks.

 

[Omnipotent]

Man, i feel for you. I used to rebuild gas engines years ago with my brother. Never tore into a diesel engine before. Something like this would be above my pay grade (comfort zone).

Yeah, I never cracked a diesel before either, but surprisingly very similar to gas engine at least in the basics of assemble/disassembly. Definitely learning on the fly, lol.