Gas tank vent valves

[Jtrux]

I am installing a new tank later this week and I need to find the gaskets for those little vent valves on top of the tank. I'm assuming the valves are good, but, if cheap enough, I'll replace them, too.

 

Where should I find them? I didn't have luck with Rock Auto.

[Tj1]

try here

[Jtrux]

Thank you

[ParadiseMJ]

The rollover/vent valves are just a ball in a cylinder,  They're there to vent the fumes into the EVAP can ... and ...if the truck goes upside down fuel doesn't pour out the vents.  Mine were toast, because the plastic tops/nipples had disintegrated.  I got the whole valve(s) at the Jeep dealer with grommets included for $25 a pop.

 

Put them in and install the vacuum lines while the tank is out...I found this out the hard way.   :doh:

[schardein]

I have a separate project that involves replacing these valves.  My plan to cross reference the part and determine if a newer part will work or if the part is still used on current cars.  Then get some from the junkyard that are like new for a few bucks.

[ParadiseMJ]

The plastic nipples deteriorate with exposure to fuel and time.  Also, the valves are a two piece design...so once you stick it in, and then try to pull it out, the bottom pops off and falls into the tank...at least mine did.  So if you're searching junkyards for pristine valves, be real careful when you're trying to pull it out of the tank.

[Virginia]

I think one of those valves broke off on the top of my 89 comanche.  Should I just replace that valve or the entire tank?