03 diesel in oil


truck has diesel in oil . any ideas where the problem is ?

 

You have one or more injectors leaking. If you change the oil, it will only happen again. You need to decide to replace each injector as they fail (03-04 injectors were junk, I know) or just bite the bullet and get all six. I replaced one under warranty and when another started to fail, I just bit the bullet as it works out cheaper in the long run if you plan to keep your truck. Don't fret, it is only money...

 

Re-torque the fuel supply tubes and see if that cures the problem. I would just re-torque the retaining nuts to 37 ft. lbs.

 

I know, everyone has their own opinion, and I'm going to give you mine as well. To answer your question, yes, you more than likely have an injector leaking. An easy and free fix would be to re-torque your feed tubes as mentioned above and hope hope all is well. Chances are, that's not going to be the case.

Now, for my opinion. Some folks will tell you that the '03-'04 engines were the best all around and on the other hand some folks will tell you they were not so well and the injectors were notorious for failing. Myself, I agree with the positives of the early CR engines and I'll tell you why. For one....I have NEVER had injector issues in almost 300k miles...reason being...proper maintenance and filter changes. Two...better fuel mileage than the later engines. Three....I believe I can easily achieve the 1/2 million mile mark....reason being....proper maintenance. And lastly, I say this because I can (and I'm not being a smart a**), mines paid for. If something goes wrong down the road I know that my truck has been extremely faithful to me and taken me halfway across the country and back several times so I will have no problem spending the money to repair the issue.

Enough of my morning ranting. If you do happen to replace your injectors just make sure you change the fuel filter regularly....Maintenance, Maintenance, Maintenance.....alot of that is free!!

 

You can also use the search function to find a bunch of threads that address your issue.

That said, if a crossover fuel tube into the injector is leaking, it generally will not make it into the cylinder. The most common cause for fuel into the crankcase is a leaky injector, not so much the crossover tubes. That fuel would have to make it past the copper crush washer to make it past the tip and into the cylinder. A cracked tip, improper seal tip to body, check ball blown out (my cause) and leaky cp3 seal are all causes.