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730D Fuel in engine oil

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Scott 730

07-08-2003 19:17:50




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Took my transfer pump apart today thinking that was the most likely problem, but discovered that the felt washer between the seals was bone dry.No fuel leak at the pump. Would the gaskets between the block and the injector mounting bracket be a likely area to look at?? I will also check the fuel lines with it running, after I remove the valve cover and injector pump cover. After about 15 hours of running time it shows about 1" over full on the dipstick. I bet my engine is real clean now!!! Thanks for everyones help with the questions I have had on here in the past.

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Mike

07-09-2003 07:57:22




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 Re: 730D Fuel in engine oil in reply to Scott 730, 07-08-2003 19:17:50  
I have had a couple tractors leak at the injection pump outlet forget proper term but it takes a big wrench 1 1/4 or 1 1/2 to tighten it. One tractor I did in there the other I had to pull the pumps to get at it. I have also ran into some broken injector lines
leaking.



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Gpower

07-09-2003 15:24:11




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 Re: Re: 730D Fuel in engine oil in reply to Mike, 07-09-2003 07:57:22  
Mike,
I believe you are refering to the delivery valve holder on the end of the pump. You have to be careful when tightening those holders down, there are torque specs, usually you dont have to worry about them, but if you get them too tight, the delivery valve has a tendency to not function properly, like sticking or not opening fully. Just dropping you a note to let you be aware, I am sure you are ok though. There are some copper round gaskets inside the pump bodies that sometimes need replacing, but usually just a proper torque and clean area fixes em right up. Later

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Clooney

07-08-2003 19:29:09




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 Re: 730D Fuel in engine oil in reply to Scott 730, 07-08-2003 19:17:50  
Scott, the most likely place is a loose injector line fitting or crack in an injector line. The transfer pump on the later Diesels have a bleed hole so the fuel won't leak into the crankcase if a seal fails.
~Pull the rocker cover & pump cover & run the engine. The leak should be visible...CAUTION!!! don't use your hand to locate the leak as that fuel is sprayed at a very high pressure & can inject the fuel right through your skin..

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Charles

07-09-2003 11:41:35




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 Re: Re: 730D Fuel in engine oil in reply to Clooney , 07-08-2003 19:29:09  
Is that also true on my 70D (transfer pump has a weep hole)? My oil level is also slowly rising at just about the same rate (1" over after 15-20 hrs). I have bought new gaskets for the pump rail to block area, transfer pump seals, etc. but have not got around to taking it apart yet (because it runs ;)



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Clooney

07-09-2003 12:31:36




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 Re: Re: Re: 730D Fuel in engine oil in reply to Charles, 07-09-2003 11:41:35  
Charles, probably not, but maybe so??? If it still has the original transfer pump it doesn't have the weep hole. If the pump has been replaced with a later pump it will have the hole. Just use a mirror or feel up under the pump & see if it has a 1/8"-3/16" hole in the bottom about even with the space between the 2 seals...



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Scott 730

07-08-2003 19:39:51




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 Re: Re: 730D Fuel in engine oil in reply to Clooney , 07-08-2003 19:29:09  
Thanks for the reply, Clooney. I will run it and check everything out. I wish I would have known about that weep hole before I pulled the pump!! One final thing; what is the purpose of the bleed tubes that come off of the injectors??



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Clooney

07-08-2003 19:48:39




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 Re: Re: Re: 730D Fuel in engine oil in reply to Scott 730, 07-08-2003 19:39:51  
Scott, those bleed tubes direct any {SLIGHT} amount of internal injector fuel leakage to the intake so it can be burned.



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Scott 730

07-08-2003 20:12:37




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 Re: Re: Re: Re: 730D Fuel in engine oil in reply to Clooney , 07-08-2003 19:48:39  
Thanks again!!!



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