2011 F-350 SD 6.7 diesel fuel filters?

agesilaus wrote:

Last word: the housing on the under the truck filter has to be tightened way past the point where you'll be worried that you are going to snap off the plastic fitting. It has to to go around until it hits a positive stop. Failure to get it tight enough means you will not get the fuel system primed. IIRC you need an 1 1/4 inch socket on a cheater bar to pull it up.

You should not need to put that much effort into that filter housing. Are you installing it with a dry o-ring? One thing I have found is that there is always a little bit of grit in the filter housing when I change filters. Some of that grit is always in the housing threads. I flush the housing and the threads on the filter head real good with carburetor cleaner and I lubricate the o-ring with a little bit of motor oil. I've also seen people use petroleum jelly to lube o-rings, but I prefer oil since I'm already changing the oil while I'm doing the fuel filters. A little bit of lube makes a big difference in how the filter housing tightens up and especially helps with removal. A lot of guys have actually broken the housing trying to remove it because the dry o-ring binds up.