I just bought a 2001 lb7 duramax that ran fine but the injectors leaked real bad at idle I purchased kits and o/h my injectors runs great except gets fuel in oil did the vac test on the return lines and right side leaks about 1 lb for 30 secs. Should I remove injectors and have tested for split or just try to seal up line or gaskets I would get a gallon or two in 300 to 400 miles. Some say to replace the lines Is that needed don't really want to pull apart again I still like this truck and don't want to HATE IT!!!

 

sounds like cracked injector body's which means you need a set of injectors most likely

 

High pressure lines , or cracked injector(s) ..

 

Thanks Guy's, I have the right side opened up and I am going to pull those four injectors and have them checked. (not an easy fix out here in the boonies)

 

Or in a shop that has every tool ..

 

i never try to re use gaskets under the valve covers. but yeah its a real pain working with those.

 

I just took my rebuilt injectors to des moines and had the right side injectors tested 3 of them leaked from the bottom nut the instructions said to put rtv on thread which I did did I miss something when I put new nozzles in the injectors?? Thanks Guys for all the feedback

 

still sounds like cracked injector bodies to me which cannot be repaired. only way to fix cracked bodies is new injectors

 

rtv on what?

 

I was told to put rtv on threads of upper and lower caps of the injector