Fuel in engine oil

[ick5521]

Hey everyone,
I'm hoping you can help me out here. I've read A LOT of posts here and I cannot believe the talent! I found one post similar to this but no responses so I decided to start my own thread. I have a 2004 F250 with about 84k miles; Seems there is a fuel leak as I am getting contaminated engine oil. My question is; what is the best way to pinpoint the leak? Are there common leak areas such as injector o-rings? Is that the only internal place fuel can leak from? Do the fuel lines seal to the heads in an internal or external location? I've never tore into a diesel motor before but have moderate experience w/ head gaskets, valve work etc on gassers. Is this something that could be done in one weekend?
Here's a picture of my rig:

[OregonStroker]

ya its prob a injector oring. any codes?

[dzchey21]

I would say it almost has to be injector o-rings or injector cups. I dont know that much about 6.0s but CAT engines uses a very similar injector in C7 and C9's and most of the time when we see fuel in the oil i comes from alot of idle time(rare) or for injector o-rings an/or cups. The injectors arent too bad but 6.0 are kinda hard to work on without taking off the cab. That being said the cups are a little different story because they require a special tool to remove them and install them. YOu might be able to find one but i dont know where for sure. Hope that helps.

[dzchey21]

is an 04 still under warranty?

[ick5521]

THANKS for the quick replies - It's definitely not under warranty. No codes either - I found out there was a problem from used oil analysis. I've got about 15k miles on the oil and it's got 5.7% contamination - I should have realized the problem at 3k when it had 1% contamination but I thought that was from idling and it didn't seem too high...

[dzchey21]

wasnt sure i thought it was 5 year 100k mile warranty. I dont know what that percent means mainly because you run your oil alot farther than i ever did. Who does your oil annalysis?

[ick5521]

Originally Posted by dzchey21

wasnt sure i thought it was 5 year 100k mile warranty. I dont know what that percent means mainly because you run your oil alot farther than i ever did. Who does your oil annalysis?

Oil Analyzers Inc has done that last couple - thought about changing to Empire because they are local and less expensive but I don't know.

[dzchey21]

ok. Ill call the oil lab tomorrow and see what they say the field trucks fuel dilution is for a 6.0 if i remember lol. Thats alot of miles so ill see what they say for something like a 5k oil change.

[OregonStroker]

did they say that was bad? If you drive around town every day and dont change your oil every 3000 i dont think 5.7 would be that serious of contamination. do you let it idle a lot?

[ick5521]

Originally Posted by dzchey21

ok. Ill call the oil lab tomorrow and see what they say the field trucks fuel dilution is for a 6.0 if i remember lol. Thats alot of miles so ill see what they say for something like a 5k oil change.

Thanks dzchey21! I'm trying to use extended drain intervals w/ AMSOIL but it may not be working as well as I'd hoped.