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Changing fuel filter

1866 Views 13 Replies 5 Participants Last post by  iamthe440
I'm going to change the fuel filter on my truck tomorrow. Any tips other than filling up the new filter with fuel before installing?


Trevor in MO
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I filled mine with Seafoam decarbonizer. bled it, got it running and
shut it down to soak for 15 mins. Runs way better, but I don't
recommend it due to lack of testing of this procedure. So far no
ill effects but long term we will see. My Ip and inj are already
160k old and I was getting a serious loss of power. I will post
any problems that come up related but until then it rips again.
It lost power slowly so I almost thought it was me, but high egt
proved otherwise. Also I was getting an Idle knock that has since
disappeared. luck of the irish or just seafoam? who knows --matt /ubbthreads/images/graemlins/shrug.gif
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I would not recommend running decarbonizer straight through the IP. I had two IPs ruined for me due to fillups of gasoline (Oregon has no self-service fuelling; the 1st rig the gas station's insurance Co. paid $3k to have all new injection parts (IP, injectors, lift pump); the 2nd rig the insurance Co. bought from me outright to avoid the same costly repair, toasted the IP in three miles). Gasoline has practically no lubricity at 2k PSI, and I imagine that Seafoam doesn't either.

Ditto what Pete said: fill the filter only into the outside holes when you fill the filter, otherwise the fuel you pour in goes to the IP unfiltered.

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Well I still don't recommended it either. I put another 200+ miles on it again today and it runs better than it ever has. Remember also that the fuel will mix, probably minimaly, with the Seafoam, and some will return to the tank. Pretty hap hazard huh, well at 160k if eats a pump or injectors it's a good excuse to upgrade. I will let you know
when and if the injector pump comes out the tail pipe. -matt /ubbthreads/images/graemlins/shocked.gif
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As I still don't recommend untried unproven, although I may try things
myself and post results I thought I might do some research on this one. I just went and pulled the can of Seafoam out of the trash to actually read it. It was originally recommended by a good friend so no questions asked I used it. For Diesels it says "fill diesel fuel filters with seafoam to clean injectors fast". So I checked out there website and they claim it actually adds lubricity. Well just
food for thought. Check them out. They are at
Well whatever you do have fun, life's short, drive hard. -matt /ubbthreads/images/graemlins/smirk.gif
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Also let it be known that I can't attribute my power gain and driveabilty to the Foam alone. It had not been all that long since the filter change but I do run a considerable amount of fuel through it, always from the station. Anyway, gotta love this website.
Drive on. -matt /ubbthreads/images/graemlins/laugh.gif
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