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07-27-2018, 05:57 PM
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#1 |
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Registered User
Join Date: Jul 2018
Location: Bethlehem, PA
Posts: 1
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Strong Gas Smell
Hi there! We have a 1972 GMC P10 Ice Cream Truck with a 250 straight six. Overwhelming gas odor fills the truck 2 minutes after turning off motor. Just had carb rebuilt, thinking that was the problem and lo and behold, she still stinks. Had it to numerous garages, no one seems to willing or able to figure it out so we thought we'd bring the problem here, to the real experts! Any ideas? Thanks in advance
 OO>
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07-27-2018, 07:42 PM
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#2 |
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Senior Member
 
Join Date: Aug 2004
Location: Centennial, CO
Posts: 2,988
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Re: Strong Gas Smell
It might be the hot fuel in the carburetor evaporating
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ClusterTruck: 68 C10 Bought in 89, wrecked in 03. Slow low $ rebuild started '17. 6.0 & TKO http://67-72chevytrucks.com/vboard/s...d.php?t=788602 93 K1500 Short Step, 350, NV4500, EBL flash ECU. Vortec heads & roller cam someday... 05 Jeep Wrangler Unlimited. 3” lift & 6-speed 02 E320 the insurance total “free car” 13 Tahoe LTZ |
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07-27-2018, 07:56 PM
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#3 |
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Registered User
Join Date: Jul 2013
Location: LI, NY 11801
Posts: 1,140
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Re: Strong Gas Smell
You should be able to see some fuel seeping out when the smell starts. Clean as much gunk from tank to carb before checking.
Look around carefully and have a fire extinguisher close by as gas is flammable. Bill
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1970 C10 8' Fleetside, L6 250, 3 on the Tree. The most basic of pickup trucks! |
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07-29-2018, 10:19 AM
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#4 |
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Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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Re: Strong Gas Smell
sour cream and onion burrito's?
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07-29-2018, 11:46 AM
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#5 | |
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Registered User
Join Date: May 2011
Location: mich
Posts: 655
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Re: Strong Gas Smell
Quote:
 
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07-29-2018, 11:52 AM
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#6 |
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Registered User
Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
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Re: Strong Gas Smell
Next time you park it like that, rubber-band a ziplock bag over the carb. If the smell does not appear, then it was coming from the carb. Then you'll know if it's gas boiling/evaporating/leaking from the carb or somewhere else in the fuel system.
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1970 GMC Sierra Grande Custom Camper - Built, not Bought 1969 Pontiac 2+2 427/390 4-speed Coupe 1969 Pontiac 2+2 427/390 4-speed Convertible |
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07-29-2018, 07:47 PM
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#7 |
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Registered User
Join Date: Jun 2013
Location: Somewhere
Posts: 3,123
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Re: Strong Gas Smell
Get under it when the smell starts and see if it smells underneath? Maybe the engine cover gasket is bad?
72 would have the unvented fuel system. Make sure the vacuum lines are good and present. Sniff around the gas tank to see if the stench comes from there? |
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07-30-2018, 06:40 PM
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#8 |
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Registered User
Join Date: Dec 2009
Location: bisbee, arizona
Posts: 1,529
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Re: Strong Gas Smell
yea, sniff around and see where the stench comes from.....
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