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#1 |
Registered User
Join Date: Mar 2014
Location: Lily Kentucky
Posts: 6
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Fuel tank issue 1967 c10
I started rebuilding my little red truck I replaced the sending unit that was the only thing I needed for the fuel system at the beginning finished up the paint job and they put fuel in the truck the gas tank expanded so bad that I had to repaint the back of the cab because it cracked the paint replace the fuel pump ordered a new gas tank and put on a new vented lid the gas tank is like the original only one line going in It as a nonvented tank other than the cap now every time I put the fuel cap on the gas tank starts expanding I cannot leave the cap On while it is running or sitting with the truck turned off any ideals on what I can do to salvage the parts I have already bought
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#2 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Fuel tank issue 1967 c10
get yourself a good vented gascap and it will solve your problem
__________________
71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#3 |
Registered User
Join Date: Mar 2014
Location: Lily Kentucky
Posts: 6
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Re: Fuel tank issue 1967 c10
I have about two from O'Reilly auto parts took the first one back just in case that was the problem still the same issue with second do you have any recommendations of where to get a good gas cap or a specific brand
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#4 |
Registered User
Join Date: Mar 2014
Location: Dallas,Texas
Posts: 35
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Re: Fuel tank issue 1967 c10
Does gas come out of your gas cap or the rubber gromit?
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#5 |
Registered User
Join Date: Mar 2014
Location: Lily Kentucky
Posts: 6
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Re: Fuel tank issue 1967 c10
It is not gas coming out it's just builds up so much pressure the tank swells I put on a new vented cap thought maybe I got a bad one took it back and exchanged it for another new one but it still builds up makes no sense the cap shouldn't let pressure get so high but yet it does so my only option thus far has been to leave the cap off
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#6 |
Registered User
Join Date: Oct 2007
Location: Spanaway
Posts: 8,451
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Re: Fuel tank issue 1967 c10
Does the cap or packaging say its indeed vented? or is it somebody behind a parts counter that looked up the wrong part?
__________________
Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's |
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#7 |
Registered User
Join Date: Dec 2012
Location: Manitoba
Posts: 644
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Re: Fuel tank issue 1967 c10
Has to be a fuel cap issue. If it's building pressure... It's not venting. Surprised it's not collapsing tank on longer run times... And starving for fuel
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#8 |
Registered User
Join Date: Feb 2009
Location: Norcal, CA
Posts: 169
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Re: Fuel tank issue 1967 c10
I've heard of guy's taking a small drill bit to a cap to make their own "vented" cap. It only needs a small hole to release the pressure.
It's a little unconventional but its a helluva lot better than leaving the cap completely off! |
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#9 |
Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
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Re: Fuel tank issue 1967 c10
The only way it could build pressure is with a FI setup, pump backwards or heat. Vented caps are to let air in, not out. What all do you have in the way of fuel setup?
__________________
I know a guy who's addicted to brake fluid. He says he can stop any time. 72 K10 396 75 Cj5 MPI 350 Chev 67 Chevelle 396, 4 speed 74 FXE 08 Tahoe |
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#10 |
Registered User
Join Date: Mar 2014
Location: Lily Kentucky
Posts: 6
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Re: Fuel tank issue 1967 c10
I was told that today's fuel has more ancho and can cause this issue thinking I may put a small hole on the bottom of the filler tube on the out side of the cab I think this May take care of it if that doesn't work I guess I could convert over to a new style tank mounted on the underside
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#11 | |
Registered User
Join Date: Feb 2009
Location: Norcal, CA
Posts: 169
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Re: Fuel tank issue 1967 c10
Quote:
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#12 |
Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
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Re: Fuel tank issue 1967 c10
I run "today's fuel" in my behind the seat tank every day. There is no way a tank should be under that much pressure without some recirc or plumbing issue.
__________________
I know a guy who's addicted to brake fluid. He says he can stop any time. 72 K10 396 75 Cj5 MPI 350 Chev 67 Chevelle 396, 4 speed 74 FXE 08 Tahoe |
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#13 |
Its a Truck Thing......
Join Date: Dec 2004
Location: Sierra Vista, Arizona
Posts: 3,159
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Re: Fuel tank issue 1967 c10
If you narrow it down to a tank issue, why not install a 71-72 vented tank? I just had a new tank from rockauto sent to my door for less than $200. It was a good brand too. I agree with the above that under normal issues the tank should not be under that much pressure.
Smitty
__________________
71 C10 283/3SPD Full Resto 71 GMC 1500 Sierra Grande http://67-72chevytrucks.com/vboard/s...d.php?t=518599 70 C10 Suburban Former military GSA truck. 72 Chevy Blazer 4X4, Sloppy Jo, Mountain Climber. Wife says no more trucks. http://67-72chevytrucks.com/vboard/s...d.php?t=707378 72 GMC 1 Ton Motor Home, wife said no more trucks until she saw this one. Gen 3 6.0/4L80E 4.10 http://67-72chevytrucks.com/vboard/s...d.php?t=761110 68 GMC Suburban was 3/4 ton, now 1/2.Wife shook her head 71 C30 Wrecker 71 C20 Scott-Bilt As weird as it gets..BB Cheyenne AC Truck 68 GMC Long Stepside. They keep following me home 71 C20 Longhorn/Ole Yellor 69 C30 Former Motor Home, Flat Bed time |
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#14 |
Registered User
Join Date: Mar 2014
Location: Lily Kentucky
Posts: 6
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Re: Fuel tank issue 1967 c10
Th only thing that I had changed when this all started was the sending unit ordered every thing else after original tank messed up
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