New Duramax Question
Hey All, I'm considering a new GMC 3500 single rear wheel diesel and have never owned a diesel before. How often do you have to change the fuel filter on a Duramax? Every 5000 miles? 10000 miles? M...
Forum Discussion
4x4ord wrote:donn0128 wrote:
Fuel filters are cheap compared to a new set of itnjectors. Change it every 10K miles or so. Cheap insurance
Why would a clean filter be easier on injectors than a dirty filter? Could be it is; I just can't imagine why.
donn0128 wrote:
Its called by pass! Dirty or clogged filters can bypass dirty fuel oil etc. One chunk of crud past the filter and your injectors are toast to the tune of thousands of dollars/Deutch marks/ euros you name it. It can get expensive in a big hurry. 50 dollars for a new fuel filter is cheap insurance.
Turtle n Peeps wrote:
Unlike oil filters, fuel filters do not have a bypass system in them.
The more they filter the better they filter (smaller and smaller particle size) until they become restrictive at full fuel flow.
As Turtle and Peeps pointed out fuel filters don't bypass and should filter to a finer degree than a clean filter. However it is not uncommon to hear people talk about the importance of changing the filter on the Duramax engines regularly such as is suggested in this article. Until I hear a reason that makes sense I change my fuel filters when I notice a lack of power or at about 40,000 miles.
