Hi All,
Have one of these engines in a crop sprayer coupled to auto box. The other day the turbo blew, turned out some of the compressor blades were not the shape they should have been, I assume this put the the shaft out of balance and swiftly destroyed the bearings/seals.
So I put a new turbo on, cleaned intercooler/pipework inlet, fresh oil/filter. Had a devil of a job to get it to start, when I did it smoked heavily (dark brown/black) which led me to believe that the intercooler wasn't as clean as it could have been of a restriction in the exhaust. Once running however it would tick over/drive just with plenty of smoke.
I suspected that a piston had picked up on the bores and the rings were knackered, so took the head off for further inspection. The bores were fine if a little glazed, no sign of foreign objects in the bores, valves looked fine no sign of contact with the head. The one think I did notice was that the tappets were very loose when I took it apart. I didn't compression test it as didn't have one at the time. I did however sit the pistons half way down the bores and tipped neat diesel in, it sat there for a good 10 mins and didn't drop (in level).
Put it all back to gather again, again a sod to start (always used to start first turn) but once running, still smoked, blue/white I assumed oil.
Took it for a spin, it showed signs of dark brown/black smoke on any throttle setting, I gave it some beans and it seemed like it wanted to run away with me, fortunately it didn't.
I have checked the pump timing (this lines up perfectly with the front piston at TDC) so discounted that. I have managed to get a compression tester for tomorrow so will see what they read, this hopefully will exlude any ring issues.
Other than I am struggling where to go, it did try and run on again when I stopped in a field, revved it up slightly and off she went, fortunately I managed to put my hand over the inlet and stop it. Rocker cover oil filler when removed was shoving plenty of smoke out, but then I am not sure how much is too much. It just seems to be running very rich, lots of black smoke, even on start up and once running, once the boost comes in it goes like a rocket.
I am leaning towards injector pump if the compressions are ok and then I guess cam timing. this engine has only done 280hrs use (I would guess less than 10,000 miles in car talk)
What sort if any problems do these pumps give? checked the return gauze filter in the back of pump, was clean.
Anyone any sensible ideas???
regards Chris
It has no EGR valve and it all old school. pushrods are fine, rockers, fine, pads, fine