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

[Racer4]

Wow, that’s some serious damage! Possible that the bottom part of a valve guide broke off and fell in? I’m really curious as to what got in there.

 

[dodge man]

The only thing I can think of is a part of injector or glow plug. Without seeing the engine I’m not sure what else in the intake would cause this. You can tell something got in there and hammered away.

 

[dodge man]

That looks like an indirect injection engine with the pre chamber that contains the injector and glow plug. I bet something in there broke off and fell in.

 

[hayden]

Or something got sucked in through the intake....

So you can't drop the oil pan, remove and replace the piston and rod, and put it back together without splitting the tractor?

I'd guess that head needs to be replaced. All those craters will mess up compression, and I'd guess they are too deep to plane the head down.

 

[Carl_NH]

Or something got sucked in through the intake....

So you can't drop the oil pan, remove and replace the piston and rod, and put it back together without splitting the tractor?

I'd guess that head needs to be replaced. All those craters will mess up compression, and I'd guess they are too deep to plane the head down.

This is what I would try first - and probably need to hone the cylinder if its scored too,

 

[edgar10937]

Pull the pan get the piston and rod out, find out what caused the mayhem, then plan course of action until you know the cause you are wasting energy.
Run the piston to the bottom check cylinder bore,
Head can be fixed needs to be crack checked along with any other work, many are running with dings in surface just be sure no sharp edges to get hot.
Does it have a turbo, heater in the intake like dodges?
Edgar

 

[WinterDeere]

I wouldn't be pulling piston and rod until after following dodge man's lead, and looking for a broken injector or glow plug. You can run the piston to the bottom of the bore to check the cylinder walls for damage from whatever object got in there, without pulling the piston.

Maybe you will need to pull it, in the end, but I'd not be jumping to that until proven necessary. There will be ridges to get those rings past, and at a mininum you'll be doing ridge cutting and honing to put the thing back together with new rings.

 

[Omnipotent]

Thanks all, didn't really think about working from my back, since I'm only "concerned" with #2 this approach does make sense.

As for the "metal", I've torn the head down as far as needed and nothing is missing, there is a bent rod on the #2 intake, so it is confirmed (at least by me) that the metal came into the intake but still don't know from where as everything is accounted for. I did run it back through the intake and up to the air filter, and nothing looks damaged, inside of intake looks "perfect". I did examine #2 glow plug and injector (as well as 1 and 3) and again they all look identical so I'm still stumped.

I am leery to replace and put back together until I at least have an idea of what caused the damage, but I'm just not sure where to go next...other than the oil pan so that will be next step (much better than separating tractor).

Also, going to bring the head to a machine shop and see if they can deck it, but some of the pitting looks pretty deep (relatively speaking) so not sure they could take off enough to make a difference.

New head is 2K, although on Ebay they have Chinese heads for $750...but are they crap or is it the same folks making the Bobcat/Kioti head anyhow.

Time will tell

 

[hayden]

So it's a valve push rod that's bent, not a connecting rod? That was unclear. Regardless, there is no way I'd reuse that piston.

Wait, that cylinder has zero compression, right? Why not? Are the valves not closing properly? Was the head gasket intact? If so, the those valves must not be seating correctly to not hold compression.

 

[dodge man]

I wonder if the valve seats are hammered also causing no compression.