Author Topic: 69 Gas Caps revisited - original Cap?  (Read 48510 times)

hubleyman

  • Member
  • ***
  • Posts: 58
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #60 on: December 03, 2015, 12:50:42 AM »
Rick,

Just so I get it right, do you mean it is a 12B 1969 Camaro body built in calendar year 1969 (versus 1968)?

Charlie

cook_dw

  • Hero Member
  • *****
  • Posts: 3981
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #61 on: December 03, 2015, 01:25:43 AM »
10E of 69  NOR  Original as far as I know since it was the one on the car from 1978..  It was getting dark and I couldn't get to the back of the Z..

hubleyman

  • Member
  • ***
  • Posts: 58
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #62 on: December 03, 2015, 01:40:31 AM »
Thanks for providing the additional info Gang.  This will be a work in progress...

I updated the list and embellished it a little.  Maybe it will show a trend after we gather enough data?

« Last Edit: December 03, 2015, 03:37:12 AM by hubleyman »

KurtS

  • CRG Coordinator
  • *****
  • Posts: 5884
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #63 on: December 03, 2015, 02:22:00 AM »
12B is always in 1968. 11A was the last week in 69.

And thanks for tabulating the data. I was hoping someone would. :)
Kurt S
CRG

69Z28-RS

  • Hero Member
  • *****
  • Posts: 5778
  • owner since 4-Apr-1976
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #64 on: December 03, 2015, 02:37:32 AM »
All the round caps seem to have paper gaskets...  mine does....
09C 69Z28-RS, 72 B 720 cowl console rosewood tint
69 Corvette, '60 Corvette, '72 Corvette
90 ZR1 red/red #246, 90 ZR1 white/gray #2466
72 El Camino, '55-'56-'57 Nomads, '55-'57 B/A Sedan

69 Zee

  • Hero Member
  • *****
  • Posts: 595
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #65 on: December 04, 2015, 03:46:52 PM »
All the round caps seem to have paper gaskets...  mine does....
X2, paper here !
Darrell
'69 Camaro Z/28: 03B NOR X77 Dusk Blue, white top, all orig, Under construction
'69 Firebird all original 350 all power w/ac
'70 Plymouth Superbird: One owner, Limelight green, 45K miles, all original U code

m22mike

  • Member
  • ***
  • Posts: 286
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #66 on: December 05, 2015, 06:00:52 PM »
All the round caps seem to have paper gaskets...  mine does....

I have restored dozens of the round caps, and some that I purchased have had a rubber gasket. 100% sure these were later service replacements. Also on the round caps there are at least 3 differant designs of the back gold plated poppet housings. Some of the later design  poppet housings on the rear have 3 inverted dimples near the vent hole, this is because the poppet in side of these are made from solid brass and the dimples allow for a air path. The previous design used a stamped steel poppet with two partial relief holes on there edge to allow for air to enter or escape.

Mike
X66 L78 M22 4.10 Deluxe Threads, PNT 10/10, Red Hockey stripe

z28z11

  • Hero Member
  • *****
  • Posts: 1853
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #67 on: December 06, 2015, 04:36:57 PM »
Later production Stant cap. Pretty darn close to my eared (original?) caps, but the logo change on the tab is a giveaway. I bought this for my 12A L78, as it has a non-Stant replacement cap on it (evidently for decades by the look of it, car was purchased in '95 and cap has not been touched since that time).

Regards,
Steve

P.S. Rubber gasket, as are both of my eared originals, 01C and 03D.
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6

FortLangleyBC

  • Member
  • ***
  • Posts: 160
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #68 on: December 06, 2015, 10:46:32 PM »
My 04C 1969 has ears (with the tabs aligned) & a rubber gasket - believed to be original.
1969 Trans Am 400 335 WQ Cameo White

hubleyman

  • Member
  • ***
  • Posts: 58
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #69 on: December 08, 2015, 12:40:40 AM »
Updated the list with a few more bits of info.

Also corrected my car data on the chart...  Went to the attic to look at my original gas tanks and discovered I accidentally took the round gas cap off my 02B and put it on my 10A car.  Old tanks all look the same in a dark attic.

FortLangleyBC

  • Member
  • ***
  • Posts: 160
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #70 on: December 08, 2015, 04:30:54 AM »
Hi Charlie - I forgot to mention my car is a Norwood build😀
1969 Trans Am 400 335 WQ Cameo White

6667ss138

  • Hero Member
  • *****
  • Posts: 524
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #71 on: December 08, 2015, 06:35:47 AM »
At first I thought my gas cap with the ears was the original for my 07A X77 car. I remember reading where it was not correct and so I purchased a round one. I'll first show pictures of the one that was on my car originally. You think this one could be the original after all?  Thanks!
« Last Edit: December 08, 2015, 07:05:24 AM by 6667ss138 »

6667ss138

  • Hero Member
  • *****
  • Posts: 524
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #72 on: December 08, 2015, 06:50:12 AM »
Round cap that I purchased later.

Hans L

  • Member
  • ***
  • Posts: 380
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #73 on: December 08, 2015, 06:44:46 PM »
'69 Van Nuy's Z.  04B.   Ears with what appears to be GM or SM stamp.  No idea if it's original.

To add to the database table - mine has the Rubber Seal with ears.   I'll post pictures this evening.
https://www.instagram.com/69camarorsz28/
'69 Camaro RS Z/28 Van Nuys Built
'69 Chevelle SS 396 4 Speed

hubleyman

  • Member
  • ***
  • Posts: 58
    • View Profile
Re: 69 Gas Caps revisited - original Cap?
« Reply #74 on: December 09, 2015, 01:49:35 AM »
OK Gang, here’s an observation that I haven’t seen mentioned in these gas cap discussions yet (or maybe I just missed this detail).

My ’69 Camaro AIM (UPC 8 – page B6) shows gas cap part number 3843698.  In the notes is states “10-10-68, WAS 3914863 CAP ASSY”.  With a fair amount of googling research, I see an overall consistent pattern for these numbers (but not with 100% accuracy), as follows:

3843698 / typically ROUND cap / RAISED LETTERS / ANTI-SURGE on top and VENTED on the bottom.

3914863 / typically EARED cap / RECESSED LETTERS / VENTED on top and ANTI-SURGE on the bottom (discontinued from parts books 7-71).

So the question is, was the EARED cap the first production line version, and then replaced with the ROUND version sometime after the revision noted in the AIM?  If so, then is it possibly: EARS for early cars, ROUND for later built cars, and a mixture for the in between models while they used up various inventories? 

If we could validate that theory, and narrow down the time frames, I’m guessing we could have a lot of gas cap trading opportunities on hand….

Charlie