fuel in oil

mudychevy

New member
Sep 3, 2009
5
0
0
buffalo mn
I have an 04 LB7 with 135k miles on it that I recently replaced 2 bad injectors in. I drove it for 2 days, mabye 40-50 miles, and it started blowing oil out the breather. I had about 5 gallons of diesel fuel in the crankcase when I drained the oil. When I replaced the injectors, the steel fuel line between the fuel rails and injectors were corroded. I cleaned them out and reused them. Could that be where the fuel is coming from, if there was pitting or something I missed when I cleaned them? I used all new o-rings and return line washers when I put the injectors in, so I doubt the return line is the issue. If it is the steel lines, where can I get them and what kind of price do they go for? Also, would running it with fuel in the crankcase cause any damage? Im sure its not good for bearings. Thanks in advance for your advice.
 

Burn Down

Hotrodder
Sep 14, 2008
7,092
28
48
Boise Idaho
I would look at the 2 injectors you just replaced return lines, cracked bodies, etc. Yes stop running it with fuel in the oil, it is hard on the bearings.
 
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mudychevy

New member
Sep 3, 2009
5
0
0
buffalo mn
yeah, when I tear it down later this week I plan on getting all 8 injectors checked out. And I guess I should rephrase that other question. What I meant was do you guys think any damage was done when I drove it that 40-50 miles while fuel was getting into the crankcase?