Simple Do-It-Yourself Instructions For Changing an ISB 6.7 Fuel Filter

[HBarlow]

It is not necessary to remove the left front tire or even the left front fender inner lining.



From below the truck reach up and disconnect the water in fuel sensor wiring plug from the base of the fuel filter cannister.



Place a catch pan under the filter to catch fuel. Using a 1/2" ratchet and a 1/2" extension long enough to reach the bottom of the cannister, insert the 1/2" drive tip of the extension in the slot in the bottom center of the filter and back it out one turn. Remove the drain valve on the bottom of the cannister by twisting the 2" plastic "star wheel" counterclockwise and allow the cannister to drain. When cannister is drained remove the cannister.



The replacement cannister contains a new filter element and the water in fuel sensor. Simply apply the supplied replacement O ring to the male end of the cannister and screw it in by hand. Hand tighten it. Reconnect the water in fuel sensor plug.



Cycle the key twice just enough to bump the starter but do not turn the engine over. This will cycle the fuel transfer pump in the fuel tank to refill the cannister.



Start the engine and test for leaks.



Record the date and mileage in your truck maintenance record book.



If your truck runs and doesn't leak fuel you did good!

 

[FrankJohnson]

Does the cannister require replacing with each filter change ? I am of the impression that there was a modification to the oem filter/cannister requiring only the element to be replaced.
Is there not a contamination issue when attemptiog to manuever the new element up through a group of rigid hoses/lines ?

 

[Jim W]

Does the cannister require replacing with each filter change ? I am of the impression that there was a modification to the oem filter/cannister requiring only the element to be replaced.
Is there not a contamination issue when attemptiog to manuever the new element up through a group of rigid hoses/lines ?

Harvey's write up was written before the new FS2 design was release. Now after purchasing the complete housing and filter of the FS2 design you only need to replace the filter element unless the housing is damage. Then they both need to be replaced.

I have always changed my fuel filter after the dealer changed the first one. I have never had a contaminate issue; if dirt does enter the filter element it will be retained in the element since it is dry. That is why you always install a filter dry (at least that was how I was taught in my Hydraulic classes).

Jim W.