1974 FJ55 Fuel Tank Venting Issue

[jefffj55]

I had the same problem. blew air through every line I could and so far so good but it hasn't been hot here in months.

 

[PabloCruise]

This summer while parked in the sun with a full tank of fuel, gas would literally run out the filler neck, down the fender and onto the ground.

I found a check valve by the fuel separator that let's air in, but not out. I can't find anyway for the tank to vent out, when the fuel expands. What am I missing?

Here is my cracked up check valve:

From here: Builds - POTM - March, 2014 - Javelina By Pablo Cruise - https://forum.ih8mud.com/threads/potm-march-2014-javelina-by-pablo-cruise.798519/page-3#post-9116342

 

[derail]

@cruiserkreutz Any update on this? I'm going through the exact same thing and I'm just starting the process of elimination. I have a new cap. (old one had a cracked rubber seal anyway) I've made sure the lines are clear. Just checking if you'd definitively tracked it down.

 

[cruiserkreutz]

@cruiserkreutz Any update on this? I'm going through the exact same thing and I'm just starting the process of elimination. I have a new cap. (old one had a cracked rubber seal anyway) I've made sure the lines are clear. Just checking if you'd definitively tracked it down.

Planning on replacing the vent in the cargo panel with a new one. Put a new oem fuel cap on it. Won't know if it's going to vent properly until summer time.

 

[Gordobe]

I took the check valve out of the equation. Done deal

 

[J Mack]

Planning on replacing the vent in the cargo panel with a new one

I made my own charcoal canister to replace all that factory stuff in the side cargo panel that ties to my tank vent and solved all my issues.