RocknRick

During my fuel filter change, I had an issue with the Fleetguard FS43255 O-ring. I placed in on the cannister and tightened the cap. The O-ring wanted to bulge out of the ring grove on the cannister. I followed the directions for proper torque. I finally just tightened until the cap felt secure and no bulge of the O-ring. Anyone else experienced this? My Truck primed and started with no leaks, so I guess I'm good. Thanks for any info. BTW, I was reading on the Cummins site that they're discontinuing the FS43255 for a "new improved filter" down to 2 micron.

SOhappy

Did you lube the o-ring? I've never had a problem with that, done it a dozen times (at least) over the years.

RocknRick

Yes, I did lube the O-ring. I just don't think there needs to be 23 ft lb of torque to a plastic cap. I appreciate your response. Thanks

Busboy

I agree that 23 ft lbs is too much, I did look but couldn't find a figure for it, I just nip it up and leak check.

RocknRick

Update...2 O-rings will prime and not leak The Wix O-ring was still in the Ring Groove, way in the Ring Groove. The Fleetguard O-ring fit nicely and filled the depth of the Ring Grove much better IMO. Plus its green and easy to see I Still need to learn patience after all the years I did feel for the old O-ring multiple times. I just figured the Dealer forgot to replace. Thanks for taking the time to answer my thread. 22.5 ft lbs is still wayyy too much torque for the plastic cap, even with 1 O-ring

kwhite

When I change mine I like to use vaseline on the o-ring. It works really good as long as you get enough on it. Some of it adhere's to the lid as you spin it.

Busboy

Ah good ol petrolatum, I use that on just about every o ring or seal.

SOhappy

You'd have required MUCH more Vaseline if you'd paid the dealer to change the fuel filter.

Blake Clark

Sorry but this made me laugh way harder than I should have.


One thing to consider, a spin on secondary filter, essentially making the factory filter become a prefilter.

Spin ons can be found for under 20 bucks (Im currently running CAT filters 18 bucks locally) and then the expensive factory filter service life could easily be doubled. Four fuel filter changes and you would have made up the cost of the secondary setup, and have better filtration too boot.

Mike Holmen

Hard to beat the 2um cat filter. I run it as well. I had a filter head given to me. The cat filter is cheaper and a higher quality filter than the cummins. I probably have 50000 miles on mine now and still works well. I still run the stock filter as well, with the cat filter afterwards. I even have an extra fitting for getting diesel fuel out my tank.

Usually when the oring gets bulging out of the canister, its to tight. I only change my filter when I get enough pressure drop across them. I run a fuel pressure gauge.