What is the difference between all the A body gas caps????

[duster360]

I keep seeing posts on here about this year gas cap and that year gas cap. Is there really a difference between the A body gas caps. Mostly curious about the '67 and up caps.

 

[Oldmanmopar]

left to right 67 - 70, 71, 72 - 73, 74 - 76 unleaded only servicable

 

[VDART]

thanks for the visual, nice info there Lawrence

 

[YellowDart69]

I've been using a spare '69 cap on my '80 D200 probably since about 1983!

 

[duster360]

Thanks Oldmanmopar. That was an awesome response. Don't get any better than that.

 

[slantsixdan]

Thanks Oldmanmopar. That was an awesome response. Don't get any better than that.

Yeah, it do: the "1971" cap is really '70 California + early '71 50-state/Canada, and late '71 through '76 caps are interchangeable, and '60-'66 A-body caps are a group unto themselves.

 

[74Dusted]

I've been using a spare '69 cap on my '80 D200 probably since about 1983!

I'm using a locking cap from a '76 Ramcharger on my '74 Duster, perfect fit, blends in nicely with the quarter panel.

 

[OneOfMany]

Nice info guys..

Grant

 

[cudamark]

Yeah, it do: the "1971" cap is really '70 California + early '71 50-state/Canada, and late '71 through '76 caps are interchangeable, and '60-'66 A-body caps are a group unto themselves.

X2. Here in Ca. there was an early '70 cap (before 1/1/70) and a late '70 cap which was like the '71.

 

[slantsixdan]

Here in Ca. there was an early '70 cap (before 1/1/70) and a late '70 cap which was like the '71.

There are two '70 caps. Difference is not early vs. late, it is with vs. without evaporative emission control system, which was required in California for '70, rest of USA for '71. The '70 California cap is same as the 50-state/Canada early '71 cap. The late '71 50-state/Canada cap is same as the '72-'76 cap.

 

[Oldmanmopar]

Trivia.. Who really knows

Why were the caps different in 71?

What was the tube in the trunk for on all unibody 71's?

Why was it discontinied in 72?

What did the dome light have to do with the removeal of the system ?

 

[slantsixdan]

Why were the caps different in 71?

A second set of tangs was added to the cap, and a pair of matching cam ramps to the filler tube, to provide a "first stop" position as the cap is removed to relieve built-up fuel tank pressure without risk of liquid fuel splashout.

What was the tube in the trunk for on all unibody 71's? Why was it discontinied in 72?

…and on California '70s. See here.

What did the dome light have to do with the removeal of the system ?

Nothing at all. The dome (top) of the fuel tank was changed for '72 to eliminate the need for the secondary internal chamber in the '71 (+'70 California) tanks.

 

[69DARTS]

if oldmanmopar says it thanks for the good info

 

[slantsixdan]

if oldmanmopar says it its true

Careful of always/never absolute statements like that. It only takes one instance of being wrong to upset that kind of applecart, and none of us is right all the time. Not me, not you, not Oldmanmopar.

 

[69DARTS]

left to right 67 - 70, 71, 72 - 73, 74 - 76 unleaded only servicable

thanks for the info

 

[green1]

It's strange; 70 Duster, early 70's, wife bought a locking cap. I hated it. Bought, maybe, a 73 from the junkyard, looked the same, but needed filing. Wagon came over here to get parts, told me that years differed. Go figure.

 

[Rice Nuker]

Careful of always/never absolute statements like that. It only takes one instance of being wrong to upset that kind of applecart, and none of us is right all the time. Not me, not you, not Oldmanmopar.

Wow.. Like a whip.

Good thread! Full of high grade Formica.

 

[Oldmanmopar]

Fuel Vapor Containment Collision Impact Protection. That cap isn't on that tube for periodic mantenance. The tube is strapped down like a cannon.

My hoses will be filled and blocked off but will remain there for appearance. I will use a 70 tube and cap on my 71 Duster. Just like I have on my current 71 Duster