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#1 |
Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,329
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NAPA Gas Caps "Junk"
Had to let you all know that I am on my second NAPA has cap in less then a year. First one lasted about a year, took it back and showed the owner the rubber sealing ring was all cracked and falling apart. He gave me another one last month, it's already doing the same thing. I run non-ethanol fuel in my GMC because it sit's un driven during the winter. Any one know of a quality cap ? I was told STANT makes the NAPA cap.
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71 C-20 07 Magnum RT AWD |
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#2 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: NAPA Gas Caps "Junk"
Interesting -- I've had a locking cap from NAPA for several years and the seal is still good. The one it replaced was the same, and its seal rotted after at least 15 years.... probably closer to 20 years. Although IIRC, I had to buy two at that time to get a good one.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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#3 |
Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,329
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Re: NAPA Gas Caps "Junk"
I went to another NAPA just to see if they stocked a different brand, they mentioned others complains too ? Manufactured overseas, not USA.
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71 C-20 07 Magnum RT AWD |
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#4 |
Senior Member
![]() Join Date: May 2012
Location: Scottsdale, AZ
Posts: 1,906
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Re: NAPA Gas Caps "Junk"
I'm on my second one too. I had each about a year and a half. Both are Murray Ultras. Not even good for hockey pucks! I will be going back to the 20 year old locking cap that still works. The rubber these days... not good!
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White K20 |
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#5 |
Registered User
Join Date: Jan 2009
Location: Calgary, AB
Posts: 1,181
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Re: NAPA Gas Caps "Junk"
It's nothing to do with the rubber. It is the fact our fuel has ethanol which contains alcohol which dries out rubber.
You can get rubber conditioner to help this but it will just happen later than sooner. |
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#6 | |
Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,500
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Re: NAPA Gas Caps "Junk"
Quote:
I had to take three Stant caps back years ago just to get one that was actually vented. All three were marked vented on the cap and came in the correct part number box.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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#7 |
Registered User
![]() Join Date: Sep 2012
Location: moon twp pa
Posts: 187
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Re: NAPA Gas Caps "Junk"
Its everything there is no quality today its all throw away, parts have really gone down hill . I have a repair shop and we get bad parts everyday sad but true !
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#8 |
Registered User
Join Date: Apr 2007
Location: pasadena,TEXAS
Posts: 880
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Re: NAPA Gas Caps "Junk"
Wish I could get non ethanol gas. 😞
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#9 |
Special Order
![]() ![]() Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,859
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Re: NAPA Gas Caps "Junk"
What did they make the seal out of, balogna?
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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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#10 |
Registered User
Join Date: Jan 2013
Location: Mickleton, NJ
Posts: 1,776
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Re: NAPA Gas Caps "Junk"
I bought 2 from brothers and 2 from LMC and 2 from Napa. Both LMC caps and both Napa caps leaked like a sieve from brand new. 1 bothers leaks too. Rubber is fine on all of them but the vent valve is open all the time and lets them spew gas. I returned the Napa ones, the others weren't worth the shipping cost.
The other one from bothers was good for a year and stopped sealing. After looking at it, the metal spring washer behind the rubber gasket weakened. The rubber is still good and the vent valve still works. I stuffed a fat o-ring behind it and it has worked for another year. So far so good.
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Shawn 1970 Chevy C-10 SWB, 350, TKO 600 5 speed My build http://67-72chevytrucks.com/vboard/s...d.php?t=559881 |
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#11 |
Senior Member
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Location: Podunk, Texas
Posts: 744
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Re: NAPA Gas Caps "Junk"
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#12 |
Registered User
Join Date: Jul 2008
Location: Eastern Oregon
Posts: 2,329
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Re: NAPA Gas Caps "Junk"
The problem I found on NAPA caps is the rubber seal is paper thin, when you crank it down it puts Hugh pressure on the rubber and it starts to break down. As far a non ethanol goes, it's all I run in my vehicles on the ranch. ATV's 71 C-20, 71 GMC. After sitting all winter everything fires right up and run good. When I use regular no such luck.
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71 C-20 07 Magnum RT AWD |
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#13 |
Project Junkie! Fishing Poor!!
![]() Join Date: Dec 1999
Location: Olympia,Wa. 98512
Posts: 10,770
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Re: NAPA Gas Caps "Junk"
There are a couple of problems going on.
One is the underside of the filler neck. 40 years of twisting caps on has warn the lip down. New caps seal but as you use them they ware in and loose that ability. Second is the poor quality of the rubber used for the seals. You see that in the cracked ones. The seals are most likely a natural rubber with talc used as a filler. No UV protectors and no oil and gas inhibiters. While I was developing some of our exclusive rubber products, is how I learned about the processes that the foreign companies use to make the crap they sell us. The rubber seal needs to be produced with a silicone based rubber blend that has both UV and oil resistors blended in. The only fix I have found for this problem are locking gas caps that push onto the neck. Their seals are thicker and last longer. WES
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#14 |
20' Daredevil (Ret)
![]() Join Date: May 2003
Location: Jefferson State
Posts: 13,621
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Re: NAPA Gas Caps "Junk"
Maybe that's why the locking caps I mentioned above have lasted so long.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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