Vented gas cap

[Grapenuts]

Does anybody know where I can get a new vented gas cap for my 74?
Thanks,
Grapenuts

 

[rcmbronc]

I got mine at the local Carquest store. I had to ask for one from an earlier model, I believe a 69.

 

[Grapenuts]

Is the cap you purchased like the standard chrome caps with a vent hole? Do you happen to know the part number or model they listed it for?
Thanks

 

[rcmbronc]

It does not have a vent hole. It is chrome. I assume that the vent is from under the cap. I dont know the part number right now, I can try to look tonight. All I asked for was a cap for a 67 or 68 bronco.

 

[mitzel]

pretty much every autoparts chain store should have replacement gas caps.
the most common ones I've seen are made by stant. go to the aisle with all the
stant thermostats and radiator caps, the gas caps should be right along side
those. there's normally an application guide hanging out there or check the
computer at the service counter for part# and you should be able to walk
away with a locking or non-locking cap for ~$10.

 

[SaddleUp]

pretty much every autoparts chain store should have replacement gas caps.
the most common ones I've seen are made by stant. go to the aisle with all the
stant thermostats and radiator caps, the gas caps should be right along side
those. there's normally an application guide hanging out there or check the
computer at the service counter for part# and you should be able to walk
away with a locking or non-locking cap for ~$10.

Sure, however I have found that most of them are actually not vented caps.

 

[edge4]

If you have a 74' they're non-vented caps due to smog regulations and if you go buy a Stant #11702 replacement it will also be non-vented (Emission Control Type). Starting in 73' Ford changed the whole filler neck assembly, including the location of the filler vent. You can see putting the caps side to side that the "vented" cap (#11623) has a shallow barrel between the gasket and the locking tabs. Later "non-vented caps have a much deeper barrel. Ford did this on purpose so that owners could not bypass the smog controls. The vented caps will not fit the later years. You have a few choices. 1) drill a hole through your cap (not the best idea, but it's been done) 2) Notch your filler neck with a hack saw on the top edge( this will prevent your gasket from making a full seal. Notch on top to prevent dribbiling) 3) Run you vent hoses to a fuel filter and a breather(I did this with my Aero fuel doors) or 4) drill out the intake valve in the cap. Good luck if you live in a testing state.
By the way, the little spring loaded device in the middle of the new cap is not a vent, it's a one way valve to let air into the tank.
Edge

 

[Grapenuts]

Thanks for the advice Edge, I installed new tanks and just plugged the vent lines. That is why I was looking for a vented cap, it looks like I will have to modify my filler neck or cap to let air back in the tank. It is creating a vacuum in the tank when it runs. I don't know if this will be a problem but I imagine it will get increasingly harder for my fuel pump to draw out fuel unless I can get some air back in the tank.

 

[broncotime]

I just bought a chrome one at the local Pep Boys for about $7. It is a STANT 11623. The catalog in the store said it was for a 1970 (which had a vented cap). I am putting it on my 1971 which was originally non-vented, but with everything removed (okay actually it decayed and fell off on its own), I needed the older style vented cap.

I pulled the rubber seal off and had it powder coated shiny black so it would match all the rest of the trim/accent pieces that go along with my new paint job.

Hope this info helps ya find one. Although, I'm thinking if you leave your EB outside, with the current price of gas, you may want to go with a locking cap!

As I just finished typing this, I noticed that edge4 already gave you all the info you needed. Oh well.

Good Luck!

 

[edge4]

Thanks for the advice Edge, I installed new tanks and just plugged the vent lines. That is why I was looking for a vented cap, it looks like I will have to modify my filler neck or cap to let air back in the tank. It is creating a vacuum in the tank when it runs. I don't know if this will be a problem but I imagine it will get increasingly harder for my fuel pump to draw out fuel unless I can get some air back in the tank.

Grapenuts,
The non-vented Stant #11702 cap will let air in. It just won't vent air out for pollution control reasons. If vacuum is your only problem, just go buy the Stant #11702.
Edge

 

[feitctaj]

Thanks for the advice Edge, I installed new tanks and just plugged the vent lines. That is why I was looking for a vented cap, it looks like I will have to modify my filler neck or cap to let air back in the tank. It is creating a vacuum in the tank when it runs. I don't know if this will be a problem but I imagine it will get increasingly harder for my fuel pump to draw out fuel unless I can get some air back in the tank.

I have no trouble getting the vented here in "Coasty " area, at Napa. stock for my 68 yes they are crome , but the vent is on the inside to allow you to blow and hear a small whistle. I had your problem up on Blewet Pass a few years ago , and 2 new caps solve it

 

[HigginsHorse]

I'm confused. If the 11702 Non-vented version lets air in so the vaccum is not created, then what is the purpose of the vented version. Would the vented version be needed for expansion reasons, like during the summer? If that's the case, then does the vented version put off a gas smell?

 

[HigginsHorse]

Does anyone know?

 

[brixter]

The vent allows pressure to escape , on vented caps you wont get that swoosh sound when you open it . Its spring loaded and wont allow the air to escape untill its built up enough pressure . You should still have a vent on the tank though to allow your tank to siphon properly . It will fill up nicer at the pump as well .

Check with the guys at Bronco Connection and see if they have a used filler tube from a Bronco with the vent on the tube , shouldnt cost much .