I'm sick of smelling like gas - The 1947 - Present Chevrolet & GMC Truck Message Board Network

stingray72 · 07-23-2009, 09:29 AM

I've replaced the gasket and ring on the tank, I've changed the gas cap. Ive taken the seat out and can't for the life of me find a leak in the tank.

I've bought a replacement tank and want to do a sidemarker fill but I can't find anyone that will do the filler neck work (I don't have tools, know how, space or time to do it). I can do the tank and hook everything up

What can I do to not smell like gas? My perfectly good running truck just sits because I can't smell like gas at work

68gmsee · 07-23-2009, 10:37 AM

Seems like there got to be someone in Atlanta or close to there that can do that for you. Check or advertise on Craigs list???

If you absolutely can't find anyone that can do the filler neck work, look into getting the kits and learn to do some of it yourself. You'll be needing the know how later on if you keep the truck or maybe get another one. Part of the fun of owning these old trucks is the satisfaction of DIY work.

hoss67 · 07-23-2009, 11:09 AM

Quote:

Originally Posted by 68gmsee

Seems like there got to be someone in Atlanta or close to there that can do that for you. Check or advertise on Craigs list???

If you absolutely can't find anyone that can do the filler neck work, look into getting the kits and learn to do some of it yourself. You'll be needing the know how later on if you keep the truck or maybe get another one. Part of the fun of owning these old trucks is the satisfaction of DIY work.

I agree. It will be a good experience. DIY gives you more satisfaction. An enjoyment of these old truck. IMO

prostreetC-10 · 07-23-2009, 11:33 AM

If you are sick of smelling like gas.....eat somewhere else besides Taco Bell!!! lol

bad68bowtie · 07-23-2009, 11:57 AM

For what it's worth, I know the reason mine reeks of gas is the actual sending unit leaks around the base of the tube. I assumed that the leak was coming from the ring and seal, but when I went to replace those it then became evident that the actual leak was coming at the tube.

I don't know if that helps any but figured I'd throw the idea out there.

mrein3 · 07-23-2009, 12:22 PM

Also check under the hood. Maybe you got a leak under there. I always smell leaks in that short piece of hose by the fuel pump long before I see any spots on the driveway or in the garage.

mclairmo · 07-23-2009, 12:37 PM

Remember that gasoline vaporizes much quicker than water. As such, it will be very hard to find a tiny leak because the gasoline will not puddle, it will immediately turn to vapor. I would replace the sender unit and use another new o-ring. Also, check all rubber and hard lines for smells. Next, check under the hood paying particular attention to the fuel pump since it has a diaphragm in it that can leak. It may be that the origin of the smell is under the hood and it just makes its way into the cab through the firewall or the cowl.

ChevLoRay · 07-23-2009, 02:38 PM

Before I took my truck apart, I thought that it was piece between the filler hole and the top of the tank. Now, I know that the filler neck is part of the tank, so that couldn't be the problem. I always smelled gasoline right after I filled up, so I quit filling it and stopped after 10 gallons. Didn't seem to be an issue after that. I'm thinking about putting in a tank in the back, in place of the spare. Yeah, that oughta do the trick.....

slategrove · 07-23-2009, 03:34 PM

Same problem here...looked for weeks to find the source and to no avail...at last, I read a post on here about a week or so ago that talked about the top of the filler tube...where the gas cap screws on, and how those can go bad...

My tank, when I fell up, will actually drip gasoline down the side of the truck...even after 3 new gas caps...locking, non locking, vented, etc....someone said that it's the top of the filler neck, where your cap connects to the neck. I think the only way to fix it is get a new tank, and when I do that, I'll be getting my tank outta the cab!!!!!

Longhorn Man · 07-23-2009, 03:42 PM

every pick up I've had leaked where the filler goes into the tank, on the bottom side of the tube.
Call some radiator shops and see what they'd charge to flush and test an old tank, and then ask what small repairs would cost on top of that fee.
it isn't that much.

ChevLoRay · 07-23-2009, 04:42 PM

Good call. Makes sense, too. The tank is out, so getting that filler neck checked out for any possible failure of integrity, will be done.

jsmithbm · 07-23-2009, 06:26 PM

There is an old Radiator shop in Hapeville that can do the testin of the tank for you and they will braze the tube on the sending unit if its the culprit. If you really want to move the tank i can find someone that will do it for you. Send me a pm and we can exchange info.

roger0080 · 07-23-2009, 07:25 PM

Is it actually leaking and the level in the tank goes down or is it just fumes?

If you have the tank that has the tubes on the right side that loop up into the back right side of the cab, they smay be missing, cracked, and/or leaking fumes there. I think it was 71-72 they did that, not sure about 1970.

I had one where a P.O. who removed that and tried to plug it but it just reaked with gas in the cab until I fixed it right.

**special-K** · 07-23-2009, 09:58 PM

Is the tank venting?What are you driving these days.I haven`t seen you here for awhile and don`t know what you have.I`ve never had this problem in any of my trucks,but I know bad venting will cause a fumey smell.

unclewatts · 07-23-2009, 10:08 PM

Check to make sure your evaporative recovery hoses aren't loose or cracked if you have them.

LUCKTRUCK · 07-23-2009, 10:12 PM

stingray72, not sure what year truck you have but........

my 68 always smelled like gas , but my 71 doesn't. The difference is that my 71 has a vapor line that goes from the tank loops up into the roof pillar then exits back out of the floor of the truck to the engine compartment, my 68 does not have this. You may want to check if you have that, if not maybe you can retrofit one. I think it makes a difference with the gas smell.

LUCKTRUCK

chuckmc8 · 07-24-2009, 08:44 AM

Stingray, I'm in Douglasville and can help if you want to install a Blazer tank conversion- I did mine and its great-I think this is the best bang for the buck mod for our trucks- the tank install is easy, the more difficult part is how you locate the filler-pm if you want to talk about it- chuck

**D.PASSMORE** · 07-24-2009, 10:13 AM

Quote:

Originally Posted by LUCKTRUCK

stingray72, not sure what year truck you have but........

my 68 always smelled like gas , but my 71 doesn't. The difference is that my 71 has a vapor line that goes from the tank loops up into the roof pillar then exits back out of the floor of the truck to the engine compartment, my 68 does not have this. You may want to check if you have that, if not maybe you can retrofit one. I think it makes a difference with the gas smell.

LUCKTRUCK

That is what I was thinking...

stingray72 · 07-25-2009, 08:32 PM

Thanks for all the suggestions guys. I"m going to pull the seat this weekend and check around the neck etc to see if I can find anything

Chuck, thanks for the offer. I'll let you know. I've done the tank before but I want the filler to be in the sidemarker light and I don't have the know how to get that done

BTW.. I've been driving my wife's old Mazda MX6 for 8 months while the truck has been parked. Talk about suck

lclippard · 07-25-2009, 11:18 PM

any good automotive shop will have an EVAP system smoke tester. see if you can get someone to hook it up and where you see smoke.....there be the leak. i use a smoke tester to find EVAP leaks, intake vacuum leaks, exhaust leaks, etc. companies like wind doctor & water doctor, use them to find leaks from windshields and such. just a thought.

chevymad · 07-26-2009, 12:35 AM

If you're using a new gas cap its probably pressurizing your tank. I think all new caps are required to hold 3psi in the tank. The old ones just vented. With a new cap on mine the inside of the truck always smelled like gas.. and releasing the cap would blow it off in your hand. After checking a bunch of them, i ended up drilling the vent in my cap.

stingray72 · 08-03-2009, 08:05 AM

Update:

I don't smell like gas anymore

Tanks has been relocated and truck is running off new poly tank from GMCPauls. Filler location is set and work is done and bed will likely go back on today provided I can find a coupling to go from a 1-1/2" ID to a 1-1/4"

70rs/ss · 08-03-2009, 02:13 PM

Congrats, but WHERE'S THE PICTS

bad68bowtie · 08-03-2009, 05:11 PM

Quote:

Originally Posted by 70rs/ss

Congrats, but WHERE'S THE PICTS

ajcan · 08-03-2009, 05:32 PM

I would like to see some pictures also.
I am interested in the filler neck location.

AJ

07-23-2009, 09:29 AM	#1
stingray72 Red Headed Step Child Join Date: Oct 2003 Location: Atlanta, GA Posts: 1,216	I'm sick of smelling like gas I've replaced the gasket and ring on the tank, I've changed the gas cap. Ive taken the seat out and can't for the life of me find a leak in the tank. I've bought a replacement tank and want to do a sidemarker fill but I can't find anyone that will do the filler neck work (I don't have tools, know how, space or time to do it). I can do the tank and hook everything up What can I do to not smell like gas? My perfectly good running truck just sits because I can't smell like gas at work __________________ "Dinner, the perfect break between work and drunk" -Homer Simpson

07-23-2009, 10:37 AM	#2
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: I'm sick of smelling like gas Seems like there got to be someone in Atlanta or close to there that can do that for you. Check or advertise on Craigs list??? If you absolutely can't find anyone that can do the filler neck work, look into getting the kits and learn to do some of it yourself. You'll be needing the know how later on if you keep the truck or maybe get another one. Part of the fun of owning these old trucks is the satisfaction of DIY work.

07-23-2009, 11:33 AM	#4
prostreetC-10 My Carbon Footprint Join Date: Oct 2008 Location: Orygun Posts: 5,527	Re: I'm sick of smelling like gas If you are sick of smelling like gas.....eat somewhere else besides Taco Bell!!! lol __________________ A quick "pedalfest" *Still getting loose (carb test)* 496 Initial fire up video!

07-23-2009, 11:57 AM	#5
bad68bowtie On the college boy budget... Join Date: Oct 2005 Location: Athens, Georgia Posts: 370	Re: I'm sick of smelling like gas For what it's worth, I know the reason mine reeks of gas is the actual sending unit leaks around the base of the tube. I assumed that the leak was coming from the ring and seal, but when I went to replace those it then became evident that the actual leak was coming at the tube. I don't know if that helps any but figured I'd throw the idea out there. __________________ -'68 C10 short/step- 350/350

07-23-2009, 12:22 PM	#6
mrein3 Registered User Join Date: Feb 2000 Location: Center City, MN, USA Posts: 3,254	Re: I'm sick of smelling like gas Also check under the hood. Maybe you got a leak under there. I always smell leaks in that short piece of hose by the fuel pump long before I see any spots on the driveway or in the garage. __________________ '70 cab, '71 chassis, 383, TH350, NP205. '71 Malibu convertible '72 Malibu hard top Center City, MN

07-23-2009, 12:37 PM	#7
mclairmo Registered User Join Date: Jan 2006 Location: Take Off Posts: 1,908	Re: I'm sick of smelling like gas Remember that gasoline vaporizes much quicker than water. As such, it will be very hard to find a tiny leak because the gasoline will not puddle, it will immediately turn to vapor. I would replace the sender unit and use another new o-ring. Also, check all rubber and hard lines for smells. Next, check under the hood paying particular attention to the fuel pump since it has a diaphragm in it that can leak. It may be that the origin of the smell is under the hood and it just makes its way into the cab through the firewall or the cowl.

07-23-2009, 02:38 PM	#8
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: I'm sick of smelling like gas Before I took my truck apart, I thought that it was piece between the filler hole and the top of the tank. Now, I know that the filler neck is part of the tank, so that couldn't be the problem. I always smelled gasoline right after I filled up, so I quit filling it and stopped after 10 gallons. Didn't seem to be an issue after that. I'm thinking about putting in a tank in the back, in place of the spare. Yeah, that oughta do the trick..... __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

07-23-2009, 03:34 PM	#9
slategrove Registered User Join Date: Apr 2009 Location: Normal, IL Posts: 138	Re: I'm sick of smelling like gas Same problem here...looked for weeks to find the source and to no avail...at last, I read a post on here about a week or so ago that talked about the top of the filler tube...where the gas cap screws on, and how those can go bad... My tank, when I fell up, will actually drip gasoline down the side of the truck...even after 3 new gas caps...locking, non locking, vented, etc....someone said that it's the top of the filler neck, where your cap connects to the neck. I think the only way to fix it is get a new tank, and when I do that, I'll be getting my tank outta the cab!!!!!

07-23-2009, 03:42 PM	#10
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: I'm sick of smelling like gas every pick up I've had leaked where the filler goes into the tank, on the bottom side of the tube. Call some radiator shops and see what they'd charge to flush and test an old tank, and then ask what small repairs would cost on top of that fee. it isn't that much.

07-23-2009, 04:42 PM	#11
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: I'm sick of smelling like gas Good call. Makes sense, too. The tank is out, so getting that filler neck checked out for any possible failure of integrity, will be done. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

07-23-2009, 06:26 PM	#12
jsmithbm Registered User Join Date: Jun 2009 Location: Newnan, GA Posts: 485	Re: I'm sick of smelling like gas There is an old Radiator shop in Hapeville that can do the testin of the tank for you and they will braze the tube on the sending unit if its the culprit. If you really want to move the tank i can find someone that will do it for you. Send me a pm and we can exchange info. __________________ Learning as I go! -------------------------------------

07-23-2009, 07:25 PM	#13
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: I'm sick of smelling like gas Is it actually leaking and the level in the tank goes down or is it just fumes? If you have the tank that has the tubes on the right side that loop up into the back right side of the cab, they smay be missing, cracked, and/or leaking fumes there. I think it was 71-72 they did that, not sure about 1970. I had one where a P.O. who removed that and tried to plug it but it just reaked with gas in the cab until I fixed it right. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

07-23-2009, 09:58 PM	#14
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,851	Re: I'm sick of smelling like gas Is the tank venting?What are you driving these days.I haven`t seen you here for awhile and don`t know what you have.I`ve never had this problem in any of my trucks,but I know bad venting will cause a fumey smell. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

07-23-2009, 10:08 PM	#15
unclewatts 70 Chevrolet=Obsession Join Date: Jun 2009 Location: nice ca Posts: 1,067	Re: I'm sick of smelling like gas Check to make sure your evaporative recovery hoses aren't loose or cracked if you have them. __________________ I'm Just like my truck. Old, Ugly and Grouchy. Except my truck starts easily in the morning and doesn't smoke! IT'S NOT EASY BEING GREEN! -Kermit the frog 1970 Chevrolet C-10 Longbed Stepside : 350, Muncie M20, 3.08 GM corp. positraction Forest green exterior/light green interior(Where all my money goes) 1996 Toyota Corolla (Parts runner)

07-23-2009, 10:12 PM	#16
LUCKTRUCK Registered User Join Date: May 2007 Location: new jersey Posts: 610	Re: I'm sick of smelling like gas stingray72, not sure what year truck you have but........ my 68 always smelled like gas , but my 71 doesn't. The difference is that my 71 has a vapor line that goes from the tank loops up into the roof pillar then exits back out of the floor of the truck to the engine compartment, my 68 does not have this. You may want to check if you have that, if not maybe you can retrofit one. I think it makes a difference with the gas smell. LUCKTRUCK



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07-24-2009, 08:44 AM	#17
chuckmc8 It's alsways something..... Join Date: Nov 2008 Location: Douglasville GA Posts: 1,171	Re: I'm sick of smelling like gas Stingray, I'm in Douglasville and can help if you want to install a Blazer tank conversion- I did mine and its great-I think this is the best bang for the buck mod for our trucks- the tank install is easy, the more difficult part is how you locate the filler-pm if you want to talk about it- chuck Attached Images Last edited by chuckmc8; 07-24-2009 at 08:47 AM.

07-25-2009, 08:32 PM	#19
stingray72 Red Headed Step Child Join Date: Oct 2003 Location: Atlanta, GA Posts: 1,216	Re: I'm sick of smelling like gas Thanks for all the suggestions guys. I"m going to pull the seat this weekend and check around the neck etc to see if I can find anything Chuck, thanks for the offer. I'll let you know. I've done the tank before but I want the filler to be in the sidemarker light and I don't have the know how to get that done BTW.. I've been driving my wife's old Mazda MX6 for 8 months while the truck has been parked. Talk about suck __________________ "Dinner, the perfect break between work and drunk" -Homer Simpson

07-25-2009, 11:18 PM	#20
lclippard Registered User Join Date: Feb 2009 Location: huntersville, nc Posts: 144	Re: I'm sick of smelling like gas any good automotive shop will have an EVAP system smoke tester. see if you can get someone to hook it up and where you see smoke.....there be the leak. i use a smoke tester to find EVAP leaks, intake vacuum leaks, exhaust leaks, etc. companies like wind doctor & water doctor, use them to find leaks from windshields and such. just a thought. __________________ 69 burb/01 yukon chassis 65 Comet Caliente 289 4 Door Sedan 99 Millenia S (supercharged) 4 Door Sedan 02 Yamaha R6 69 swb c10 http://67-72chevytrucks.com/vboard/s...36#post3799136 building with a buddy: 85 C10 http://67-72chevytrucks.com/vboard/s...94#post3708194

07-26-2009, 12:35 AM	#21
chevymad Registered User Join Date: Jan 2001 Location: skamokawa, WA, USA Posts: 527	Re: I'm sick of smelling like gas If you're using a new gas cap its probably pressurizing your tank. I think all new caps are required to hold 3psi in the tank. The old ones just vented. With a new cap on mine the inside of the truck always smelled like gas.. and releasing the cap would blow it off in your hand. After checking a bunch of them, i ended up drilling the vent in my cap. __________________ 70 C10 long fleet, 355/200 4r, 6 lug disc conversion, 3" drop 70 gmc changed to 67/8 chevy, 454 with voodoo cam, th400, all 74 running gear.. in progress

08-03-2009, 08:05 AM	#22
stingray72 Red Headed Step Child Join Date: Oct 2003 Location: Atlanta, GA Posts: 1,216	Re: I'm sick of smelling like gas Update: I don't smell like gas anymore Tanks has been relocated and truck is running off new poly tank from GMCPauls. Filler location is set and work is done and bed will likely go back on today provided I can find a coupling to go from a 1-1/2" ID to a 1-1/4" __________________ "Dinner, the perfect break between work and drunk" -Homer Simpson

08-03-2009, 02:13 PM	#23
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: I'm sick of smelling like gas Congrats, but WHERE'S THE PICTS

08-03-2009, 05:32 PM	#25
ajcan Registered User Join Date: Mar 2009 Location: Covington Georgia Posts: 87	Re: I'm sick of smelling like gas I would like to see some pictures also. I am interested in the filler neck location. AJ

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