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730Diesel Spitting Oil? out the exhaust

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Ken- (Lou., KY)

07-18-2002 19:48:43




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I don't drive my 730 Diesel very much but when I do it begins to spit oil out the exhaust pipe when it gets warm. I have been told this is unburned diesel because it slobbers really bad at the exhaust manifold. Is this normal?




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Clooney

07-19-2002 06:56:00




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 Re: 730Diesel Spitting Oil? out the exhaust in reply to Ken- (Lou., KY), 07-18-2002 19:48:43  
Ken, no that's not normal. ~None of mine do it even it I don't work them.
~Assuming the engine isn't worn, the compression is good & the oil isn't diluted with diesel fuel you could have a defective thermostat [does the engine reach operating temperature or stay cold?]
~Run the engine for about 1 minute & touch both sides of the exhaust manifold at the exhaust port area to see if they are the same temperature, if not one side isn�t firing good. ~If the engine is reaching operating temperature I would try what both Mike & Lee suggested as that is easy & could help.
~If after new fuel, & running it under load for a while it doesn't improve. You will have to do a little detective work.
~Start by doing as Mike said & check the pump timing, then check the rack adjustment to see if the pumps are set even, then pull the injectors & hook them up so the tips are pointing forward & crank the engine to see if you are getting a good looking spray pattern with no dripping between squirts [CAUTION: don't put hand in front of injectors to check as they can inject fuel through your skin]..There is a good chance you will find a faulty injector spray pattern or dripping injectors. ~If all ok per above you should then run a compression test [not easy] or have a compression test run on it. ~You can do the above yourself [you will need to get a manual, even the I&T manual does a good job of explaining the pump setting & injector test procedure] but after that you will probably need help with the compression test & if the compression is good & the engine is reaching operating temperature you might need to send the pumps & injectors out for calibration or rebuild.

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chuck

07-19-2002 10:19:22




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 Re: Re: 730Diesel Spitting Oil? out the exhaust in reply to Clooney, 07-19-2002 06:56:00  
my 720 did that it was the oil retern in head the valv cover full of oil and by passing valvs



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MIKE HANLEY

07-18-2002 22:00:45




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 Re: 730Diesel Spitting Oil? out the exhaust in reply to Ken- (Lou., KY), 07-18-2002 19:48:43  
If it sets alot It could be stale fuel. Try some Diesel conditioner in the tank. However it could be the timing of the high pressure pumps is off so that it sending fuel to the cyls when the exaust valves are still open. Those "timing marks" should be right on the money. I know guys have played with that to try and get more power, BUT>>>>>>> We bougthe the back-up 730D at a auction 7 years ago and somebody had the timing 180 degrees off and had compensaded all the way back to the throudle. How they got it to run like that I will never know. Those to things will cost the price of can of conditioner and a couple of gasets. When you put back the pump cover there is (or should be) a check valve on top of the cover (1 1/8" wrench I think) with a line going to fuel tank. When putting that back on use pipe dope NOT TAPE and just "snug" it. Those thredes have been knowen to crack with tape and tighten to much.

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MIKE HANLEY

07-18-2002 22:13:46




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 Re: Re: 730Diesel Spitting Oil? out the exhaust in reply to MIKE HANLEY, 07-18-2002 22:00:45  
CORRECTION..... Now that I think about it it wasn't off 180 drgrees It was off one cod on the flywheel and when we timed it, it was worse and then finally spotted the v marks on the on the crank and the flywheel were off. Still I do not know how they got it to work that way but it did run good under light loads.



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Lee

07-18-2002 21:07:39




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 Re: 730Diesel Spitting Oil? out the exhaust in reply to Ken- (Lou., KY), 07-18-2002 19:48:43  
Ken, these diesel tractors are not worked like they use to be. Try to work tractor after you get it up to operating temp..See if you can work a field for a farmer. you must get temp. up . It's hard to find a field to work right now. [ here in IL.] Also see if you can find a Dynometer at a tractor show, Most people at shows are more than willing to help. some say the injectors need work ,but try working tractor first and see what happens, before doing repairs. Good Luck Lee

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