D239 diesel, fuel in blowby pipe revisted, in crankcase!

well I guess if you leave things alone long enuff they break to the point you can fix them :? ,,

day before yesterday I used the backhoe, still had a little fuel coming out teh blowby pipe, I checked the oil and it was a quart or so low, I only had to work it a little so I didnt add any,, today the neighor want to borrow it to move a couple yards of dirt,, I knew it needed oil so we checked it,, it was full!!!!-- but not of oil, it was overfull of fuel, it dripped off in my hand when checking,,

so I NOW have fuel in the crankcase, where it can maybe be diagnosed better than just coming out the blowby pipe and not in teh crankcase as before,,,

so where do I start looking for the culprit?

injector?

the front lip on the injector pump? how?

rings? I hope not..

no loss of power, and no significant smoke issues, starts quick and easy,,

thanks guys I appreciate any ideas,pat

BTW international 2500A backhoe, with the d239, bosch injector pump.. europe?

Hi, most likely front lip seal on Bosch injector pump. Have replaced 2 in 454 with D179 which is 3 cyl version of D239. Unfortunately you have to remove the pump to replace the seal. Be sure to mark exact location of pump on the mounting flange before loosening any mounting bolts. DO NOT loosen cap screws on pump drive gear. You only have to remove big nut on pump drive shaft via the access hole in the front of the pump drive gear cover. DO NOT rotate pump drive shaft when you have it removed, if you do rotate drive shaft then rotate it 2 revs in direction of travel.

Good luck
JimB

(quoted from post at 11:34:19 05/04/09) Hi, most likely front lip seal on Bosch injector pump. Have replaced 2 in 454 with D179 which is 3 cyl version of D239. Unfortunately you have to remove the pump to replace the seal. Be sure to mark exact location of pump on the mounting flange before loosening any mounting bolts. DO NOT loosen cap screws on pump drive gear. You only have to remove big nut on pump drive shaft via the access hole in the front of the pump drive gear cover. DO NOT rotate pump drive shaft when you have it removed, if you do rotate drive shaft then rotate it 2 revs in direction of travel.

Good luck
JimB

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thanks jimB,, I have actually heard this prior, I think you actually suggested it on my first post,thansk,,

is there a way to check that or is it just hit and miss and hope that is teh trouble,, I am sure once it is off I will see if it is cracked or ripped,,

Is this a fairly simple replacement, my book only shows the removal of the unit procedures, but I looked up caseih parts and it seems pretty straight forward,, retaing clip, nut and all in front should come out??

then replace seal and reverse order,, any thing special I would need to look out for?
thanks pat

Pat, I don't know of a way to tell if it is the injection pump lip seal is leaking without replacing it but I believe that is the only place Diesel fuel can get into the crankcase unless there is an injector stuck open but you would be loosing power & blowing raw fuel out the exhaust. You will not be able to see the leak with the pump off. This is a common problem with the old Bosch injection pumps and the new low sulphur Diesel fuel. The lip seal is lubed by the Diesel fuel and the lubricity of the new low sulphur fuel is much less. Solution is Diesel fuel conditioner or a tablespoon of crankcase oil added to the fuel tank at every fill up.
Hints, make sure everything is clean around the pump, when you remove a fuel line or injector line cap both ends off. Require a seal puller, becareful not to scratch the drive shaft where the seal rides, I like to put seal lubricant on seal and drive shaft, use a deep socket of appropriate size to install the seal, make sure seal is seated properly.
My brother & I replaced one on his 454 about 5 years ago and seal was about $8.00 CND.
Re oil coming out the breather pipe, we had a 674 with D-239 for a short time before trading for 684. When we had 674 if you were on a steep hill or side hill with breather pipe down oil would run out the breather. 684 with D-239 does not leak oil, IH Dealer said there was a change to breather pipe of filter on breather pipe. So when you are at the Dealer you may want to ask about breather pipe change.

JimB