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03-22-2014, 10:52 PM
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#1 |
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Registered User
Join Date: Nov 2011
Location: Okotoks Alberta
Posts: 12
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Gas leak
So between the flanged line and the brass nut fuel drips in the cab of the truck, when I take the fuel cap off the tank shrinks, drip stops, and air escapes, but the kicker is when I blow on the gas cap I can hear the valve open and air rushing through the check valve..... Tried to drill a hole in the check valve but the valve just spins freely, got the cap from napa, is there some kind of special vented cap I need?
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03-22-2014, 10:54 PM
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#2 |
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Registered User
Join Date: Nov 2011
Location: Okotoks Alberta
Posts: 12
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Re: Gas leak
Gas cap
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03-22-2014, 11:05 PM
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#3 |
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Registered User
Join Date: Nov 2011
Location: Okotoks Alberta
Posts: 12
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Re: Gas leak
It's a 1968, with a non vented tank.
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03-23-2014, 11:20 AM
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#4 |
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Registered User
Join Date: Sep 2013
Location: Gonzales, La
Posts: 1,441
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Re: Gas leak
I had the same issue recently with a new vented cap. Changed the vented cap out and the issue went away.
__________________
MyToys: Goldilocks the "Ol School Survivor" 1968 C10, SWB Stepside, 08/15 TOTM, 250 CI 6 cylinder, 3 on the tree, 3.73 rear, 3/5 static drop, 23,500 original miles. Samson the 1970 CST10, LWB, 462Ci, Turbo 350 tranny, 3.08 rear gear, PB, PS, A/C, AM/FM, 2/4 Drop. Brutus the 1998 Camaro Z28, 33,500 original miles, LS1, 519 RWHP/497 RWTQ. Member of the Louisiana Classic Truck Club, LCTC Member of the Louisiana C10 Club Member of the Baton Rouge Drifters Car Club |
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03-23-2014, 11:30 AM
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#5 |
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Registered User
Join Date: Feb 2008
Location: Tacoma Washington
Posts: 890
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Re: Gas leak
There has to be a vent...either the cap or a tank vent.
__________________
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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03-23-2014, 02:54 PM
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#6 |
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Registered User
Join Date: Jan 2014
Location: okay.oklahoma
Posts: 41
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Re: Gas leak
vented or not if gas is leaking you have a problem the fuel line has probably been overtightened and crushed the flare on fuel line
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03-23-2014, 06:53 PM
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#7 |
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Registered User
Join Date: Nov 2011
Location: Okotoks Alberta
Posts: 12
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Re: Gas leak
Can you put a Teflon tape on the line? Or re press the flange?
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03-23-2014, 08:52 PM
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#8 |
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Registered User
Join Date: Jan 2014
Location: okay.oklahoma
Posts: 41
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Re: Gas leak
I would reflare the fuel line or replace
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03-23-2014, 11:42 PM
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#9 |
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Registered User
Join Date: Nov 2011
Location: Okotoks Alberta
Posts: 12
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Re: Gas leak
Driving me crazy, I drilled a hole in the vent of the fuel cap, and it works but will leak a little fuel out the cap..... Tried a new cap pressured up so much I needed a wrench to take it off and it still leaked at the flair, reflaired the fuel line still leaked, put the cap with the hole in the vent again....
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03-24-2014, 04:11 PM
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#10 |
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Registered User
Join Date: May 2008
Location: S.W. Chicago, IL.
Posts: 317
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Re: Gas leak
Is that steel line just a stub that goes into rubber hose?
I would replace the steel fuel line, preferably 1 piece from the sending unit through the cab floor. Then, use rubber to connect to the steel line along the frame rail. The flare and/or threads might be bad. Replace it. Fuel leaks, especially inside, are not good. |
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