Darn, I cant get rid of that gassy smell! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Sillyoldman · 05-09-2005, 01:31 PM

My truck still has the gas tank in the cab. My truck is stock, so relocation is no option. Has anyone had a mild lingering gas smell? (not of the human nature). My tank does not leak. I have a new filler neck gasket and cap. Could it be the old hoses are emitting the odor? The smell is slight, but wont go away. Ayone with ideas?

70c10 · 05-09-2005, 01:54 PM

Check the O ring around the sender on top of the tank.

farside847 · 05-09-2005, 03:04 PM

Does it smell more when you fill it up, or all the time?

If its when you fill up you might want to swap out the filler hose.

cdowns · 05-09-2005, 03:39 PM

it's a good idea to replace ALL the original pieces of rubber hoses even the one under the cab going to the frame rail . and as mentioned the O'ring gasket for the sending unit also while changing that is a good time to clean/replace the sock strainer in the tank

useRc10 · 05-09-2005, 03:57 PM

gas smells good though... (mine usually does, a little more than usual at fill ups)

flip66 · 05-09-2005, 06:28 PM

I would check what everyone else has suggested so far first. I had the same problem after checking everything the smell was still there, I bought a vented gas cap to fix it but it did not.

Some one posted pictures on how to cut the spring in the vented gas cap so it would vent better I did it and it worked great no more gas smell.

68C15 · 05-09-2005, 10:19 PM

does it have the EEC feature where there is a hose coming from near the filler then goes up inside "B" pillar & back down. maybe this is venting.
just an idea.

**Richard** · 05-09-2005, 11:48 PM

Check the rubber fuel lines attaching to the sending unit in the cab. If they are original I bet they are cracked. Had this happen in two trucks, lines look ok untill you take a real good look.

Longhorn Man · 05-10-2005, 12:09 AM

if all this fails to net you a fuel less cab, look on the bottom of the filler neck where it joins the tank. (no hoses on these rigs) They often crack right there. Easy to solde.

One day this summer, you should probably gut the int of the truck, pull the cab, and scrub everything real good. There is probably small amounts of fuel that has soaked into the carpet and into the sheet metal/rust.

Sillyoldman · 05-11-2005, 02:45 AM

I'll start checking hoses cracks ect. How does the sending unit come out? I don't see any screws. No carpet to hold the smell. Cab was just painted. No vent in pillar either.

Beefcake · 05-11-2005, 10:43 AM

I take it people are not allowed to smoke in your truck?? hee hee....

chickenwing · 05-11-2005, 11:23 AM

Sending unit has a lock collar. There are tangs on it. Use a screwdriver and hammer to lightly tap counter clockwise.

Sillyoldman · 05-11-2005, 12:04 PM

Quote:

Originally Posted by Beefcake

I take it people are not allowed to smoke in your truck?? hee hee....

Actually people are not allowed in my truck, period!

Thanks Chicken wing. I suppose I had better get a new gasket before I take it apart..

dave3156 · 05-13-2005, 03:01 AM

I had the same problem, it was the hoses, I took the seat out to get a good look. That was the only way I could really get a good look at them. Once I replaced them the smell was gone.

05-09-2005, 01:31 PM	#1
Sillyoldman #16876 Join Date: Apr 2005 Location: Auburn WA Posts: 12,266	Darn, I cant get rid of that gassy smell! My truck still has the gas tank in the cab. My truck is stock, so relocation is no option. Has anyone had a mild lingering gas smell? (not of the human nature). My tank does not leak. I have a new filler neck gasket and cap. Could it be the old hoses are emitting the odor? The smell is slight, but wont go away. Ayone with ideas?

05-09-2005, 01:54 PM	#2
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Check the O ring around the sender on top of the tank. __________________ Jim 1970 C/10 Fleetside w/Ghost Flames Lowered 4.5" front and 4" rear (Raked) 355/350 Turbo w/shift kit 10" Redneck Performance Verter w/2500 stall Hooker Super Comps part#2808-1 Performer RPM Air-Gap 12 Bolt w/3:73 gears- Eaton Posi Comp Cams XE262 with 1.6 Crane Energizers, Road Demon 625 and Brodix IK 180 heads

05-09-2005, 03:04 PM	#3
farside847 Registered User Join Date: Feb 2005 Location: Bay Area, California Posts: 995	Does it smell more when you fill it up, or all the time? If its when you fill up you might want to swap out the filler hose. __________________ 1971 Chevy C10 Shortbed Stepside, 307v8 3-on-the-tree

05-09-2005, 03:39 PM	#4
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	it's a good idea to replace ALL the original pieces of rubber hoses even the one under the cab going to the frame rail . and as mentioned the O'ring gasket for the sending unit also while changing that is a good time to clean/replace the sock strainer in the tank __________________ 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

05-09-2005, 03:57 PM	#5
useRc10 Registered User Join Date: Feb 2001 Location: Mechanicsville, VA, 23111 Posts: 1,138	gas smells good though... (mine usually does, a little more than usual at fill ups) __________________ -'02 Chevy Avalanche, 5.3L, 4x4... needing a small lift and bigger tires -'72 Chevy C-10(350, bored 60 over)dual flowmasters, 3 on the tree -'85 K5 Blazer,305 NO MORE...350 is in,2" lift,33" Mickey Thompson Baja Claw Radials -dads '70 burb (red, 5-7 drop, 350...) www.geocities.com/userc10/truckhome.html AIM: Auntjoedadda

05-09-2005, 06:28 PM	#6
flip66 Registered User Join Date: Jan 2004 Location: Garland TX Dallas area Posts: 658	I would check what everyone else has suggested so far first. I had the same problem after checking everything the smell was still there, I bought a vented gas cap to fix it but it did not. Some one posted pictures on how to cut the spring in the vented gas cap so it would vent better I did it and it worked great no more gas smell. __________________ 1998 Pontiac Grad Prix GTP 1969 C10 396 TH400 3.08 posi

05-09-2005, 10:19 PM	#7
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	does it have the EEC feature where there is a hose coming from near the filler then goes up inside "B" pillar & back down. maybe this is venting. just an idea. __________________ Man rule #77...if you own a 67 stepside with a caddy 472 you will never be in danger of loosing you man card

05-09-2005, 11:48 PM	#8
Richard Senior Member Join Date: Dec 1999 Location: Southern California Posts: 2,783	Check the rubber fuel lines attaching to the sending unit in the cab. If they are original I bet they are cracked. Had this happen in two trucks, lines look ok untill you take a real good look. __________________ Richard 1972 K10 Custom Deluxe SWB Fleetside My build https://67-72chevytrucks.com/vboard/...d.php?t=800746

05-10-2005, 12:09 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	if all this fails to net you a fuel less cab, look on the bottom of the filler neck where it joins the tank. (no hoses on these rigs) They often crack right there. Easy to solde. One day this summer, you should probably gut the int of the truck, pull the cab, and scrub everything real good. There is probably small amounts of fuel that has soaked into the carpet and into the sheet metal/rust.

05-11-2005, 02:45 AM	#10
Sillyoldman #16876 Join Date: Apr 2005 Location: Auburn WA Posts: 12,266	I'll start checking hoses cracks ect. How does the sending unit come out? I don't see any screws. No carpet to hold the smell. Cab was just painted. No vent in pillar either.

05-11-2005, 10:43 AM	#11
Beefcake Registered User Join Date: Mar 2003 Location: Motor City Posts: 540	I take it people are not allowed to smoke in your truck?? hee hee.... __________________ 72 GMC Camper Special 2500. currently has 350/350/14 bolt. 383 and 400 tranny is in the works.

05-11-2005, 11:23 AM	#12
chickenwing Lovin' Life in Miss.! Join Date: Mar 2004 Location: Puckett, Mississippi Posts: 1,937	Sending unit has a lock collar. There are tangs on it. Use a screwdriver and hammer to lightly tap counter clockwise. __________________ The truck... you hear that? No really, you did hear that?!!!

05-13-2005, 03:01 AM	#14
dave3156 Registered User Join Date: Mar 2004 Location: St. Louis, MO Posts: 336	I had the same problem, it was the hoses, I took the seat out to get a good look. That was the only way I could really get a good look at them. Once I replaced them the smell was gone.



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