I pull a 5th wheel with a 00 Cummins sweet running truck. So bought a 01 Duramax last year (love the body style) the guy told me it might need head gasket the upper rad hose was hard after it set overnight. I tested the coolant with purple water no change in color. drove the truck off and on again over the next year put around 1500 miles on it lost very little coolant no smoke. pulled the injectors and had one cup come out with the injector. going to pull all the cups replace the one and use a thread lock to reinstall want to have all my new injectors ready before I start reassemble to seat the cups so stay stock or up to
15%

 

stock injectors for a lb7 can provide enough fuel to support around 550hp you'll need a bigger turbo and built trans before bigger injectors. when you buy them but from alligator merchant or lincon diesel parts for good injectors. if say EFilive tuning is what you want the possibility are amazing id recommend a egt and optanal boost gauge

 

^ x2 keep em stock if anything install lbz regulator on your cp3

 

thank you i'll keep it stock

 

thank you for the info i'am going to try rebuilding my injectors found some stock tips through wholesale injector everyone else had 15% or higher

 

changing out the tips wont make them last longer, what fails on them is internal.