How to change fuel filter?
Can anyone tell me how to change the fuel filter on my Cummins ISC 8.3 engine. Difficulty, etc. Looks like it would be fairly easy.
Forum Discussion
First let me say that I pre-fill my fuel filters before installation.
Second, I have a lift/transfer pump that would supply fuel if I didn't do so.
Third if we don't fill the filter prior to installation where does the entrapped air go when the transfer pump pressurizes the system? I realize there is a bypass loop back to the fuel tank, or the inlet to the injection pump in some cases, for excess fuel to use as a return, but does that eliminate entrapped air if it doesn't return to the tank? If it does return to the tank how long, if ever, does it take for the air to perk out of the fuel? Since there are aftermarket filter systems that claim to eliminate entrapped air from fuel with resulting performance gains it would seem that the fuel is never completely free of entrapped air and that the system as designed is able to cope with that air.
Maybe there are no 100% correct answers to my inane questions, but they are things that make us (me) wonder.
Bottom line, it is a tried and true practice to fill filters prior to installation. I do it with all filters if possible.
Second, I have a lift/transfer pump that would supply fuel if I didn't do so.
Third if we don't fill the filter prior to installation where does the entrapped air go when the transfer pump pressurizes the system? I realize there is a bypass loop back to the fuel tank, or the inlet to the injection pump in some cases, for excess fuel to use as a return, but does that eliminate entrapped air if it doesn't return to the tank? If it does return to the tank how long, if ever, does it take for the air to perk out of the fuel? Since there are aftermarket filter systems that claim to eliminate entrapped air from fuel with resulting performance gains it would seem that the fuel is never completely free of entrapped air and that the system as designed is able to cope with that air.
Maybe there are no 100% correct answers to my inane questions, but they are things that make us (me) wonder.
Bottom line, it is a tried and true practice to fill filters prior to installation. I do it with all filters if possible.
