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*Smelling Gas In The Cab*
#1376645 Thu Sep 10 2020 05:11 PM
Joined: Nov 2019
Posts: 430
O
Shop Shark
I have a 49 pickup with the gas tank still in the cab. I just started smelling gas inside the cab and can't figure out where it's coming from. I have checked all the rubber fitting and hard fittings and everything is dry as a bone. I know the last time I filled up the gas started to spit out a little from the filler neck so maybe it's to full and up in the neck of the filler tube. Just don't know. Anyone ever have this issue of smelling gas in the cab?


"If you can't fix it with duct tape it's an electrical problem"
1949 5 Window 3100
Veteran of the USAF
Re: *Smelling Gas In The Cab*
olezippi #1376646 Thu Sep 10 2020 05:33 PM
Joined: Apr 2005
Posts: 9,012
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
Everyone who’s ever owned/driven a Chevy/GMC pickup with the original gas tank.🛠


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2)
‘39 Dodge Businessmans Coupe
USAF 1965-69 Weather Observation Tech (got paid to look at the clouds)


"I fought the law and the law won" now I are a retired one!
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Re: *Smelling Gas In The Cab*
Justhorsenround #1376647 Thu Sep 10 2020 05:42 PM
Joined: Jul 2000
Posts: 1,037
G
Shop Clutterist
Originally Posted by Justhorsenround
Everyone who’s ever owned/driven a Chevy/GMC pickup with the original gas tank.🛠
LOL grin

It's never a good idea to overfill the tank on any vehicle. The old idea of squeezing in more gas to round up to the whole dollar is unnecessary in this day of plastic money. Overfilling the tank on the a modern vehicle may cause fuel to enter the vapour hose which may get you a check engine warning.


Gord
----
1954 1/2 ton 235 4 speed
Re: *Smelling Gas In The Cab*
olezippi #1376648 Thu Sep 10 2020 05:47 PM
Joined: Jan 2013
Posts: 1,662
S
Shop Shark
I purposely never fill past 3/4 tank, never smell it at that level but if it is full I will everytime.


1953 Chevrolet 3100
261 cu inch, sm420, 3.55 rear, torque tube still,omaha orange, still 6 volt, RPO green glass, side carrier spare, all done
https://www.youtube.com/watch?v=Bli...n05i04t1aokgm4p04jiwgffwhyyih5xbk0h00410
1964 GMC 1000
305 Big Block V6, sm420, the next cab off restoration
Re: *Smelling Gas In The Cab*
olezippi #1376652 Thu Sep 10 2020 06:42 PM
Joined: May 2017
Posts: 82
S
Shop Shark
Check your sending unit gasket,then check the hose to steel connections finally the gas cap .Also check your hard line connection to sender.
You can sniff around and the sent will get stronger when you find it. I can fill my tank to the top of the fill and not smell gas inside the cab.Outside yes as tank vents I can smell gas, no smell at 3/4 tank.

Last edited by sack; Thu Sep 10 2020 06:44 PM.
Re: *Smelling Gas In The Cab*
olezippi #1376664 Thu Sep 10 2020 10:14 PM
Joined: Feb 2016
Posts: 416
7
Shop Shark
olezippi, have you had the tank out of the truck in the past couple of years? might have some rust holes near the top as mine did.


1957 Chevrolet 5700 LCF 283 SM420 single speed rear, 1955 IH 300U T/A, 1978 Corvette 350 auto
Re: *Smelling Gas In The Cab*
olezippi #1376685 Fri Sep 11 2020 01:55 AM
Joined: Nov 2019
Posts: 430
O
Shop Shark
Thanks for the info guys. It's a pretty new tank and everything is dry. This is the first time I have smelt gas. I'll run some of the gas out and see if that helps.


"If you can't fix it with duct tape it's an electrical problem"
1949 5 Window 3100
Veteran of the USAF
Re: *Smelling Gas In The Cab*
olezippi #1376702 Fri Sep 11 2020 04:37 AM
Joined: Mar 2010
Posts: 9,443
5
Master Gabster
Ethanol blend gas warps the rubber gasket on aftermarket sending units. Pull the sending unit and see.

Re: *Smelling Gas In The Cab*
sstock #1376720 Fri Sep 11 2020 03:29 PM
Joined: Jun 2008
Posts: 318
S
Shop Shark
Originally Posted by sstock
I purposely never fill past 3/4 tank, never smell it at that level but if it is full I will everytime.

Same for me. I wonder if the filler tube is cracked.

Re: *Smelling Gas In The Cab*
olezippi #1376725 Fri Sep 11 2020 04:57 PM
Joined: Aug 2017
Posts: 478
S
Shop Shark
So, I started smelling gas in cab one day. Never smelled it before.
Turns out the bottom Petcock ( goes through the cab) was leaking at the threads( inside the cab area). . Drained tank, got new petcock ( one in truck was original) and problem fixed.
It was not leaking a lot but was leaking.
Todd

Last edited by Shaffer's1950; Fri Sep 11 2020 04:58 PM.
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