I appear to have fuel in my oil, engine runs fine but has been getting poor fuel mileage lately. I notice a leak under my truck, after investigating I found it was dripping out of the engine breather it smelled like diesel, I checked my oil and it was over full. Has anyone had this problem?

I appear to have fuel in my oil, engine runs fine but has been getting poor fuel mileage lately. I notice a leak under my truck, after investigating I found it was dripping out of the engine breather it smelled like diesel, I checked my oil and it was over full. Has anyone had this problem?


need some info on your truck. LB7 trucks injectors are under warrenty 7yr/200k. Sounds to me like you need to not touch a thing and let reputable dealer look at it, I am willing to bet that it is your injectors. Does it blow white smoke? after you get it warmed up and shut it off will it restart within a half hour later? fill out a sig with all your trucks info and mods so we can help more!

Welcome to the site! Keep Reading!

You most definitely have cracked injectors. Let's hope you are under the 7 year from in service date, and 200K miles.

Go back to the VIN check forum and run your VIN to see your trucks history and the in service date.

Like Jcool said, fill out your signature in the User CP area and tell us all about your truck, mods, history, etc. Let us know where you are, and someone might be able to stear you to a good dealer.

Read this.

http://www.dieselplace.com/forum/attachment.php?attachmentid=44988&d=1189213609

I was fightin that prob for a while, no warrenty cause my mods but it had new inj. before i got it, I had the same prob that was gradualy geting worse over a few months, had a inj leakin around the fuel inlet fitting. If U do the work ur self PM me, I've got some good info for u to use if u want!

I've had mine apart about 10 times so i can do it in my sleep now!!!

I was fightin that prob for a while, no warrenty cause my mods but it had new inj. before i got it, I had the same prob that was gradualy geting worse over a few months, had a inj leakin around the fuel inlet fitting. If U do the work ur self PM me, I've got some good info for u to use if u want!

I've had mine apart about 10 times so i can do it in my sleep now!!!

If you are going to forward some info on replacing injectors Im all ears!!! I would like to do it myself after the warrenty is up

If you are going to forward some info on replacing injectors Im all ears!!! I would like to do it myself after the warrenty is up

For all interested, I'll start a new thread here in the LB7 pages on my tips and experiances!:D

My 02 began showing the same symptoms. The local Chevy service department checked it out and found all injectors good. Further tests discovered the high-pressure fuel system leaking on left bank. They replaced all left bank seals, which solved the fuel-in-oil issue. Cost = $782. They also stated on the work order the seal leakage was caused by using high percentages of bio-diesel, seems the original copper seals were not designed to withstand the stuff. The replacement seals will withstand bio-diesel.

Getting my injectors replaced tomorrow,Started getting fuel in my oil.
# 7 injector shot * 8 new injectors Tomorrow not bad for 170000 miles
First injector problem