Crd 2.8 oil dilution problem

Mgm · **Joined:** Sun Nov 26, 2017 6:24 am **Posts:** 3

Hi all.

Decided to register to this forum because of your crd knowledge.

We have major problem with our family daily driver. Our 2.8 crd leaks diesel fuel into oil. I Can drive maybe 150miles after oil change and there will be over a litre of diesel fuel mixed in engine oil.

Local diesel expert changed injectors but it did not fix problem.

Otherwise engine runs fine. No smoke but fuel economy BAD.

Engine end of life? :cry:

WWDiesel · **Posted:** Sun Nov 26, 2017 1:03 pm

Mgm wrote:

Hi all.

Decided to register to this forum because of your crd knowledge.

We have major problem with our family daily driver. Our 2.8 crd leaks diesel fuel into oil. I Can drive maybe 150miles after oil change and there will be over a litre of diesel fuel mixed in engine oil.

Local diesel expert changed injectors but it did not fix problem.

Otherwise engine runs fine. No smoke but fuel economy BAD.

Engine end of life? :cry:

Sounds like it is running way to rich! Are you seeing lots of black smoke when accelerating? :roll:

Mgm · **Joined:** Sun Nov 26, 2017 6:24 am **Posts:** 3

No black smoke at all but maybe smell of raw diesel when idle. Engine runs and sounds ok.

I sometimes get turbo boost solenoid cel codes. Could malfunctioning turbo case this?
Any ideas?

WWDiesel · **Posted:** Sun Nov 26, 2017 3:28 pm

Mgm wrote:

No black smoke at all but maybe smell of raw diesel when idle. Engine runs and sounds ok.

I sometimes get turbo boost solenoid cel codes. Could malfunctioning turbo case this?
Any ideas?

Low boost should cause low power and excess black smoke! :roll:

GordnadoCRD · **Posted:** Sun Nov 26, 2017 3:51 pm

If it's correctly assembled, There is only one way for fuel to get into the crankcase oil, and that's past the pistons.

With that much fuel getting TO the pistons, I can see no way that it could be running properly.

Even if it's happening somehow when not running, it would be really bad to start up, because to get to the point of leaking past the pistons, it has to fill the entire combustion chamber in the piston first, and that will have to completely empty out the exhaust before it can run properly, not to mention the fumes getting torched through the turbo and out the exhaust.

There's just no where that the fuel goes that can be leaked and do that. Even if the return lines are leaking, it has no way to get into the crankcase.

Are you completely sure someone's not pranking you?

GordnadoCRD · **Posted:** Sun Nov 26, 2017 3:55 pm

Do you have anyone hinting about getting a new vehicle, perhaps? EDIT: Because the only other way is if it's poured directly in the oil filler spout.

dh100m · **Posted:** Sun Nov 26, 2017 4:07 pm

check the fuel return line for blockage had similar with old case deisel 188 to

geordi · **Posted:** Sun Nov 26, 2017 8:33 pm

I can't believe that the injectors were determined to be good... how were they checked, was it at a certified Bosch shop? Where are you located, maybe someone is nearby? I'm the traveling mechanic for these, if you would like me to come and look at it in person.

With that much contamination of the oil, there is no way that it can be running properly.

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geordi · **Posted:** Sun Nov 26, 2017 8:35 pm

Different question... are you sure it is diesel contamination?

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aaronguy2k1 · **Posted:** Mon Nov 27, 2017 12:06 am

How does one measure the amount of diesel fuel in the oil?

DieselJeepLuvr · **Posted:** Wed Nov 29, 2017 12:14 am

If the injectors and piston rings are good that can't happen. unless someone plumbed the injector return line directly into the crankcase somehow...

Mgm · **Joined:** Sun Nov 26, 2017 6:24 am **Posts:** 3

Thanks for help. Fuel return line seems to be completely clogged! Must be the problem.

WWDiesel · **Posted:** Wed Nov 29, 2017 4:22 pm

Mgm wrote:

Thanks for help. Fuel return line seems to be completely clogged! Must be the problem.

Clogged with what??? :shock:

flash7210 · **Posted:** Wed Nov 29, 2017 4:53 pm

WWDiesel wrote:

Mgm wrote:

Thanks for help. Fuel return line seems to be completely clogged! Must be the problem.

Clogged with what??? :shock:

The small return line from the injectors has a check valve in it.
Maybe the check valve is stuck.

Crd 2.8 oil dilution problem

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