D7-17A Engine Damage from Diesel In Crankcase

Doesn't look good but I've seen worse and still operating. Question is what do the other bearings look like. Is there any noticeable knock coming from the engine and what do you have for oil pressure?

Doesn't look good but I've seen worse and still operating. Question is what do the other bearings look like. Is there any noticeable knock coming from the engine and what do you have for oil pressure?

Well, if the other bearings don look any worse than you could replace all the rod and mains and try from there. Cam bearings should not be that bad because the turn at a much slower speed.

Well, if the other bearings don look any worse than you could replace all the rod and mains and try from there. Cam bearings should not be that bad because the turn at a much slower speed.

I am guessing the cylinders and pistons will also be rough as the diesel in the oil probably caused a lack of lubrication. When I noticed the oil pressure falling the water temperature was going up fairly rapidly. When I drained the oil and diesel out of the crankcase there was a lot of shiny metal flakes floating on the oil. I guess that was bearing Babbitt and maybe flakes from pistons and cylinders. Have not taken the heads off yet to look at the cylinders. I am trying to decide if I want to rebuild the engine out of the machine or just scrap the whole tractor out.

i agree. roll some new bearings in and proceed. i would feel the rod journals real good to make sure no metal is stuck to them.

What are the thoughts on cylinders and pistons? Do y'all think that there maybe some scoring of the cylinder walls and piston skirts?

How difficult will it be rolling in new bearings with the oil pan removed? I have not looked for where the diesel got into the crankcase. I am guessing it might have gotten in thru the fuel transfer pump.

Usual mystery source for fuel leakage that gets into main sump is the fuel gallery "O" ring seal between the fuel injection pump and the base of the filter housing. Leakage from the transfer pump would normally show up in the tell tale drain line coming from the transfer pump seal cavity.

Those old engines are pretty forgiving, I'd think you'd have to run until pistons seized in the bores before they would see significant damage.

Rolling bearings out and in is a bit of a job but certainly can be done. If your not up to the task better hire someone to do the job.