I am replacing the rear fuel tank on my '95 F350 5.8L because it's rusted through and am having a problem with the fuel vapor valve mounted on the top of the fuel tank (aft-of-axle).

First I couldn't get the old one off the old tank so I bought a new one today along with the grommet at the Ford dealer; luckily they had one in stock these seem hard to come by except maybe Ford or LMC Truck. Now I am having trouble installing it in the new tank.

Anyone have any experience with this? It seems I am close to getting that grommet in and seated if I push the valve through it first and then insert in tank. It is a very tight fit and using a screwdriver to wedge it in... tried for a little while before taking a break as I was getting ticked off at it. I also tried by first installing the grommet and then trying to push the plastic valve through. No wonder I could not get the old one out this thing is tight.

thanks in advance...

 

Put the grommet in first, and TWIST the FVPV into place...literally is a no brainer...Just DO NOT HOLD IT BY THE BARB....It WILL break (Ask me how I know) and you'll be and square one....A lil drop of vaseline will make it slick and easier to twist in...

 

wow - I had lubricated with WD-40 before I had posted but can't believe what a little vaseline does! Got it in just fine, thanks!

btw... I searched but didn't see an answer to the question of whether of not it matters which hose gets plugged into which vent on the dual port valve... do you remember? I see the fittings are dissimilar, same size but a little different looking.

 

Mine were all single port deals...lol

Find you another gas tank sitting, an nab ya one of the single port setups...

On hindsight, did you take the hoses off, or were they already off? Hmmm....Sounds like you could easily trace the vapor lines...And match them according to size....

 

They were attached and I took them off not noticing they port tubes were a little different looking until later ... don't think it's a big deal I'll trace the tubes out. I already paid for the dual-port and installed it. I would have used my old valve but after 16 years the grommet was so hard it could not be separated from the tank.

 

A little bit of PB Blaster will aid in that...