The Under the Hood
Show
Dear Motor Medics, I have a 2014 GMC K3500 truck with a 6.6 diesel engine. I am on my second set of fuel injectors in 160k miles.
Are there some better injectors I can buy for this truck so that I don’t have to keep replacing them? They cost thousands to replace and I don’t want to keep having to do it.
They are also telling me that the pump is starting to fail and that I should replace the entire system or they won’t give me any warranty on the injectors.
Rudy in Okoboji, Iowa
Dear Rudy, You have an expensive one there. Injector replacement is not uncommon on diesel vehicles but there are many preventive steps you can take to help.
First off, use only very good quality fuel and use and additive every tank full. Yes, you heard correctly, every tank, not just now and then or in the winter. Not using any additive in one tank allows dry poorly lubricated fuel to damage injectors a little at a time until they fail. This is also very hard on the pump as well.
Changing fuel filters regularly is also important as running with a restricted filter is just as bad as poor quality, no additive fuel.
As for injectors themselves, we have not seen any better units, but any injector will benefit from the aforementioned items.
When the pumps fail, they can leave metal in the system which causes damage so replacing it entirely is often needed. Take care, The Motor Medics
- Log in or Subscribe to post comments.