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#1 |
Registered User
![]() Join Date: Jul 2016
Location: New Orleans
Posts: 362
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Is There a Gas Cap that Doesn't Rot-out Quick?
Anyone have any luck finding a replacement gas cap that the rubber will last at least a little while? This one is about a year old and already cracking.
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#2 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
It's your fault for exposing it to gas fumes. No, and sorry, just kidding. That is ridiculous. I haven't had to buy a gas cap in so long I have no idea what it good today. Does Stant still offer them? I'd buy from a company like that, it's what they do and have been doing forever, sooner than one offered by a 67-72 GM Truck parts supplier. Those might be Stant as well, but when you buy Stant you know you are getting Stant… if they are still any good.
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"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#3 |
Registered User
Join Date: Aug 2011
Location: Southern, CA
Posts: 141
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I feel your pain. I've gone through 3 gas caps in the last 5 or so years. Buying the Counterpart locking ones. They seem to leak after a year or so. It gets so I don't fill the tank all the way because of this. Next time around I am going to try a different brand.
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#4 |
Who Changed This?
![]() Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,404
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I had terrible luck with locking caps, even from Stant. Maybe a couple of years, and the gasket is gone. I just have a chrome Stant non-locking cap. It must be on there about three years, now.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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#5 |
Senior Member
![]() Join Date: Apr 2016
Location: Fairbanks, AK
Posts: 336
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I have had the same problem. Instead of buying a new cap, I cut a new rubber gasket. I used some stuff made for flat roofs. It seems to be holding up well. ( At least longer than the original one did.)
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1972 GMC K2500 Super Custom Matt |
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#6 |
Registered User
![]() Join Date: Jul 2016
Location: New Orleans
Posts: 362
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
Thank you all for the replies.
I heard I need to find a good rubber supplier and simply replace the gasket. Not so sure about that - finding good Supplier that is. ![]() I have this ol'67 C20 about 95% complete - its the replacement parts that I am still having to get working right. Go figure?! ![]() |
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#7 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
Is yours locking or regular. I hate locking caps. I'd rather let someone steal my gas
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__________________
"BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~ |
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#8 |
Registered User
![]() Join Date: Mar 2007
Location: Colorado
Posts: 361
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
If you use epdm rubber it is suppose to be chemical resistant. I am going to try it on both of my trucks. It’s frustrating turning corners and puking gas out.
__________________
1968 SWB "Little White Truck" 1972 LWB LS 4l80 "Plain Jane!!" |
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#9 |
Registered User
![]() Join Date: Feb 2019
Location: Nor Cal
Posts: 822
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
Make your own Gasket..
https://www.grainger.com/category/ra...&filters=attrs
__________________
1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA |
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#10 |
Active Member
![]() Join Date: Oct 2002
Location: Ft. Myers, Fl
Posts: 1,716
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I only fill up with Ethanol-free gas in my old trucks, haven't had to change rubber fuel lines since.
Maybe its also easier on my gas cap. |
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#11 |
Senior Member
![]() Join Date: Apr 2016
Location: Cypress, TX
Posts: 3,711
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I'm sure non-ethanol is easier on your rubber, depending on what you have. I can't get ethanol-free for daily driving, it is too far away and too expensive. I had trouble with Stant cap rubber deteriorating and wrote to Stant to specifically ask them about the rubber and to complain about how it starts cracking and breaking up immediately. They wrote back to say they had no plans to change, they are happy with things the way they are, and denied the cap is made out of inappropriate type of rubber. So, I've bought the last Stant cap I ever will, I threw it in the trash, and even if they do come to their senses I won't be changing my mind. Stant is burned into my brain permanently as the wrong brand to buy. I bought a United Pacific Locking Gas Cap S1301 from Summit in Jan of 2017, and it has shown no deterioration at all since then, I just went out to the truck now and examined it. Ethanol does not deteriorate rubber that is formulated properly.
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#12 | |
Active Member
![]() Join Date: Oct 2002
Location: Ft. Myers, Fl
Posts: 1,716
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
Quote:
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#13 | |
Registered User
![]() Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
Quote:
I got one for my Napa cap, and not looked back. How's that for the Mother of Invention? |
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#14 |
Registered User
Join Date: Jul 2019
Location: Beebe, AR
Posts: 2,459
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I keep a sheet of viton around to cut my own gaskets when needed. Noticed my five month old gas cap gasket was already curling. Nothing but non ethanol fuel in the tank.
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1967 C10 1980 Jeep CJ5 2020 Toyota 4Runner 2024 Toyota Tundra |
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#15 |
Registered User
Join Date: Nov 2019
Location: Denver-ish
Posts: 107
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I bought a replacement rubber seal for my gas cap on my 66 Mustang, and after 2 years it still looks brand new. It looks to be about the same size. I got it from NPD, and it was ridiculously cheap. If you can give me ID and OD measurements, I'll be happy to compare.
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#16 |
Registered User
![]() Join Date: Feb 2019
Location: Nor Cal
Posts: 822
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
__________________
1968 C20 Fleetside 396 4sp PS PB AC CST . https://www.youtube.com/watch?v=RWK8GgWD4uA |
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#17 |
Registered User
![]() Join Date: Jul 2016
Location: New Orleans
Posts: 362
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
More great feedback, thank you.
I use a non-locking gas cap and have used only non ethanol premium gas. |
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#18 |
Registered User
Join Date: Feb 2018
Location: Doland SD
Posts: 836
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Re: Is There a Gas Cap that Doesn't Rot-out Quick?
I bought one frome running. I can't remember what the brand was. It was for a tractor. Fit my pickup just fine. Still holding up good.
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![]() 94 chevy k1500 350 tbi 373 rear gears 4l60e one wheel peel. Gutless 07 gmc sierra classic rcsb 4.3 lt 5 speed w/t 04 chevy Silverado 1500 ext cab 5.3 4l60e. 81 chevy Scottsdale k10 muncie sm465 Np208 10 bolt 8.2 ( Old Green) |
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