Jason Savedra
Member
I am noticing a large amount of fuel leaking out through the fuel cap on my 67 Satellite. It is a locking gas cap. I guess my question is that is there a fuel cap that will stop the leaking?
Leaking Fuel on Corners
- Thread starter Jason Savedra
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Jerry Hall
Well-Known Member
Have you made sure your vent lines are not stopped up? Also what is the condition of the seal on your cap? It seems to me, it's a uphill battle to be leaking at the cap on a 67 Satellite. I think the system has to be pressurizing the tank to force fuel out at the cap. 67 Satellites have no return line to the tank unless modifications have been made, also there are to many other connections for a possible leak other than at the highest point in the system. A little more detail on how and when you are experiencing this would help.
Jason Savedra
Member
Yes, at both levels. The rubber seal is in good condition but I do not think that is the proper fuel cap. Is there a recommendation for a non-locking gas cap?
Jason Savedra
Member
When cornering fuel runs down the side of the car around the fuel filling area. I will definitely check the vent lines. The gas cap is vented also.
Jerry Hall
Well-Known Member
The stock gas cap was not vented on the 67's B bodies. Is this something that has started happening or always happened?
Jason Savedra
Member
It has been happening since i have owned the car.
Jerry Hall
Well-Known Member
My opinion is a non vented cap with a good seal should take care of it.
Jason Savedra
Member
Do you have any recommendations on where to find one?
I think the gas cap needs to be vented with a single fuel line setup.
If you pump fuel to the carburetor the volume needs to be replaced by air.
Also when you fill the tank from an underground tank the gas is cold and then as you drive the car you blow nice hot air under the car.
So you generate vapor and pressure in the tank, with a non-vented cap where does it go?
If you pump fuel to the carburetor the volume needs to be replaced by air.
Also when you fill the tank from an underground tank the gas is cold and then as you drive the car you blow nice hot air under the car.
So you generate vapor and pressure in the tank, with a non-vented cap where does it go?
Jerry Hall
Well-Known Member
That's why in my first post I, asked if the vent lines were checked. The 67 B bodies have an elaborate vent system and can use a non vented cap since the tank is already vented.
Jerry Hall
Well-Known Member
A quick search yielded this. Not my favorite, but a solution I would think.
https://images.app.goo.gl/qTXomXZDnNMYfNuq6
An original 67 cap will run up to as much as $75 or more for a good one and they are getting harder to find.
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Plymouths and Dodges are different. Plymouths have a small vent to atmosphere at the top of the filler neck, but Dodges don't, and require a vented cap.
Jason Savedra
Member
So I bought this set up for the satellite, i figured it might be an upgrade. My concern is that i may be short on Hardware to complete the install. Does anyone have a diaphragm of this by chance
Thinking my locking cap was not sealing on my 63 Fury, I replaced it with a tight one. Then...on a hot day, full tank, fuel leaked out of the sender hole, which had been tightly installed. I went back to the loose, locking cap, no leaks up hill, and no pressurization any more.
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