Author Topic: 69 Shelby gas cap  (Read 1393 times)

Royce Peterson

  • Hero Member
  • *****
  • Posts: 782
    • View Profile
Re: 69 Shelby gas cap
« Reply #15 on: May 05, 2022, 05:49:38 PM »
The G40A has a check valve in it that lets air in the tank as fuel is depleted. It does not let fuel or fuel fumes out.
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

crossboss

  • Sr. Member
  • ****
  • Posts: 309
  • ^My Current Project^
    • View Profile
Re: 69 Shelby gas cap
« Reply #16 on: May 06, 2022, 04:49:08 PM »
FWIW,
My old 1970 GT-500 had a non-vented cap. Yes, it was a California car.
Past owned Shelby's:
1968 GT-350--Gold
1970 GT-500--#3129--Grabber Orange.
Current lifelong project:
1969 Mustang Fastback/FOX chassis, 5 speed, 4 wheel discs, with a modern Can-Am 494 (Boss 429), Kaase heads, intake with a 1425 cfm 'B' Autolite Inline carb, ala Trans-Am style…Whew!!

Royce Peterson

  • Hero Member
  • *****
  • Posts: 782
    • View Profile
Re: 69 Shelby gas cap
« Reply #17 on: May 06, 2022, 06:24:46 PM »
Right, the California and Arizona cars had an evaporative emissions charcoal cannister that is the vent for the tank, so a different gas cap is used for those cars. It doesn't need a vent if the system is installed and working properly.


FWIW,
My old 1970 GT-500 had a non-vented cap. Yes, it was a California car.
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

Bob Gaines

  • SAAC Member
  • Hero Member
  • *
  • Posts: 6477
  • Original Posts:14706
    • View Profile
Re: 69 Shelby gas cap
« Reply #18 on: May 06, 2022, 08:20:24 PM »
Right, the California and Arizona cars had an evaporative emissions charcoal cannister that is the vent for the tank, so a different gas cap is used for those cars. It doesn't need a vent if the system is installed and working properly.


FWIW,
My old 1970 GT-500 had a non-vented cap. Yes, it was a California car.
Those different non vented caps used on the evaporative emission equipped cars fit a special necked down filler tube which makes it necessary for the the cap to be much smaller then the typical stock cap.
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby

Special Ed

  • Hero Member
  • *****
  • Posts: 998
    • View Profile
Re: 69 Shelby gas cap
« Reply #19 on: May 06, 2022, 11:20:23 PM »
Royce didnt know az had same fuel evap law as cali where did u get that info as didnt it say on invoice cali evap option or was it by dso?

Royce Peterson

  • Hero Member
  • *****
  • Posts: 782
    • View Profile
Re: 69 Shelby gas cap
« Reply #20 on: May 07, 2022, 08:11:06 AM »
Ed,

Arizona adopted the California emissions rules in about 1964 so anything California did they made the same. Arizona adopted Thermactor at the same time as California, etc. Probably because Phoenix and LA both had serious air pollution from car exhausts and fumes.
1968 Cougar XR-7 GT-E 427 Side Oiler C6 3.50 Detroit Locker
1968 1/2 Cougar XR-7 428CJ Ram Air C6 3.91 Traction Lock

crossboss

  • Sr. Member
  • ****
  • Posts: 309
  • ^My Current Project^
    • View Profile
Re: 69 Shelby gas cap
« Reply #21 on: May 07, 2022, 11:45:56 AM »
Also, wasn't there a re-call concerning the gas caps causing fires from the fumes and the center exhausts?
Past owned Shelby's:
1968 GT-350--Gold
1970 GT-500--#3129--Grabber Orange.
Current lifelong project:
1969 Mustang Fastback/FOX chassis, 5 speed, 4 wheel discs, with a modern Can-Am 494 (Boss 429), Kaase heads, intake with a 1425 cfm 'B' Autolite Inline carb, ala Trans-Am style…Whew!!

J_Speegle

  • SAAC Member
  • Hero Member
  • *
  • Posts: 2791
  • Just here to help :)
    • View Profile
    • ConcoursMustang.com
Re: 69 Shelby gas cap
« Reply #22 on: May 07, 2022, 01:34:18 PM »
Also, wasn't there a re-call concerning the gas caps causing fires from the fumes and the center exhausts?

Yes and for cars that returned for that they got a non-vented cap and a vent added to the factory filler neck as shown in past threads on the subject
Jeff Speegle- Mustang & Shelby detail collector, ConcoursMustang.com mentor :) and Judge

Bob Gaines

  • SAAC Member
  • Hero Member
  • *
  • Posts: 6477
  • Original Posts:14706
    • View Profile
Re: 69 Shelby gas cap
« Reply #23 on: May 07, 2022, 01:56:33 PM »
Also, wasn't there a re-call concerning the gas caps causing fires from the fumes and the center exhausts?

Yes and for cars that returned for that they got a non-vented cap and a vent added to the factory filler neck as shown in past threads on the subject
A slight addition in that besides the added tube vent the dealer ether replaced the stock cap with a non vented cap or made a revision to the stock cap that rendered it non venting as per factory recall instructions.
Bob Gaines,Shelby Enthusiast, Shelby Collector , Shelby Concours judge SAAC,MCA,Mid America Shelby