The old Gas smell in the cab - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Bill72BB · 07-14-2004, 11:24 PM

Well filled the tank the other day and had the smell of gas in the cab , didn't go away after driving for a day or two .The smell was strongest around the sending unit so I replaced the two small hoses that attach to the sendin unit and still smell gas . I'm thinking it's the gasket to the sending unit Why now???

Has anyone else had this gasket go bad??

gonebad2 · 07-15-2004, 01:31 AM

I have seen them get cracks with age. Give it a shot. The gasket is cheap and it's a great way to spend half of a Saturday replacing the old one.

70c10 · 07-15-2004, 01:38 AM

I bet you are right Bill. They do go bad.

Crank · 07-15-2004, 02:53 AM

Uh, how do you take like 12 hours to do something I could do in like 15-35 minutes??? I dont know, maybe it's the old in ya? Hehe.
Brandon

gr8scott51 · 07-15-2004, 09:50 AM

Check your gas cap, too. The rubber seal will age harden and crack and weep.

barn9 · 07-15-2004, 01:20 PM

This is a little off the gasket topic, but several years ago I got back to my truck after a morning in the woods deer hunting, and when I opened the door, there was a strong gas smell. I opened all the windows and drove back home (5 miles), and proceded to look at the things you guys have mentioned, and couldn't spot anything out of order, yet the gas smell was strong. A little more looking and feeling around, and I discovered the carpet wet under the seat, so I knew then there was a leak. Proceded to take the seat out, and the carpet and insulation were soaked worse than I thought. The culprit was a piece of gravel that had become wedged between the floor pan and bottom of the tank. No telling how long it had been there, but it was tightly wedged and had managed to wear a pinhole into the tank. I guess the moral of the story is, if anyone has the seat out for any reason, it not only is a good time to give the area around the tank a good cleaning, but worth a look for anything that might have gotten in between the floor and tank, 'cause it doesn't take much to create a problem.

**Classic Heartbeat** · 07-15-2004, 01:54 PM

Bill, I have found that gas smells inside the cab can come from many sources. The first place I would look is at your fuel line leading into the carb. I darn near killed myself and family because of that. I smelled gas in the cab on that one all the way home from Monroe swap meet. I thought that it was the sending unit seal, seal for the pin that you connect the sending unit wire to, or leaking out the gas cap and the gas following the filler neck into the cab. Turned out to be a broken fuel line leading into the carb. Next, I would check around your filler neck. If your cap is leaking and following the neck back into the cab, you will see evidence of it. Then if that doesn't seam to be the problem, then check the sending unit. There are 2 seals to check there. One is the big "O" ring that seals the unit to the tank, and the other seals the pin that your sending unit wire plugs into. There will be a little nut that you can tighten if that is leaking. Sometimes you get lucky on that, but sometimes you dont. If you tighten the nut too tight you may ground the pin out on the sending unit and it needs to be isolated from it. Good luck.

WES www.ClassicHeartbeat.com

Bill72BB · 07-15-2004, 03:10 PM

Thanks for all the suggestions ,Just got back from getting the o ring seal and will check allthe easy stuff B4 replacing it .

Zumo · 07-15-2004, 03:10 PM

I had a pin hole in the bottom of my tank once. Slow leak but long enough to stink up the cab. I replaced the tank.

busterwivell · 07-15-2004, 03:25 PM

Bill, if it's your tank, you can have the one I pulled out of my cab. Let me know quick, as I have to go to Minn Saturday. I can probably find someone going to Pomona who can bring it to you.

Bill72BB · 07-15-2004, 05:50 PM

Quote:

Originally Posted by busterwivell

Bill, if it's your tank, you can have the one I pulled out of my cab. Let me know quick, as I have to go to Minn Saturday. I can probably find someone going to Pomona who can bring it to you.

Bill : thanks for the offer I just replaced the gasket ,and broke the track on the 98 60/40 seat and had to fix that also I'll test it in a bit I checked the tank and floor real good and didn't see anything that make me think it's the tank .

Thanks again

busterwivell · 07-15-2004, 06:04 PM

Anytime.

07-14-2004, 11:24 PM	#1
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	The old Gas smell in the cab Well filled the tank the other day and had the smell of gas in the cab , didn't go away after driving for a day or two .The smell was strongest around the sending unit so I replaced the two small hoses that attach to the sendin unit and still smell gas . I'm thinking it's the gasket to the sending unit Why now??? Has anyone else had this gasket go bad?? __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

07-15-2004, 01:31 AM	#2
gonebad2 Merciless Butcher Join Date: Oct 2003 Location: CC Nevada Posts: 1,447	I have seen them get cracks with age. Give it a shot. The gasket is cheap and it's a great way to spend half of a Saturday replacing the old one. __________________ Your Bought And Sold....I Got Your Soul!

07-15-2004, 01:38 AM	#3
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,856	I bet you are right Bill. They do go bad. __________________ 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

07-15-2004, 09:50 AM	#5
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	Check your gas cap, too. The rubber seal will age harden and crack and weep. __________________ Silence is golden, duct tape is silver. - Scott

07-15-2004, 01:20 PM	#6
barn9 Half a bubble off! Join Date: Jun 2000 Location: Winfield, Ks, USA Posts: 5,588	This is a little off the gasket topic, but several years ago I got back to my truck after a morning in the woods deer hunting, and when I opened the door, there was a strong gas smell. I opened all the windows and drove back home (5 miles), and proceded to look at the things you guys have mentioned, and couldn't spot anything out of order, yet the gas smell was strong. A little more looking and feeling around, and I discovered the carpet wet under the seat, so I knew then there was a leak. Proceded to take the seat out, and the carpet and insulation were soaked worse than I thought. The culprit was a piece of gravel that had become wedged between the floor pan and bottom of the tank. No telling how long it had been there, but it was tightly wedged and had managed to wear a pinhole into the tank. I guess the moral of the story is, if anyone has the seat out for any reason, it not only is a good time to give the area around the tank a good cleaning, but worth a look for anything that might have gotten in between the floor and tank, 'cause it doesn't take much to create a problem. __________________ Just call me LB. '71 Cheyenne, 402BB, hauls blondes, brunettes, or redheads.

07-15-2004, 02:53 AM	#4
Crank Registered User Join Date: Aug 2002 Location: Crittenden, KY Posts: 1,965	Uh, how do you take like 12 hours to do something I could do in like 15-35 minutes??? I dont know, maybe it's the old in ya? Hehe. Brandon

07-15-2004, 01:54 PM	#7
Classic Heartbeat Project Junkie! Fishing Poor!! Join Date: Dec 1999 Location: Olympia,Wa. 98512 Posts: 10,766	Bill, I have found that gas smells inside the cab can come from many sources. The first place I would look is at your fuel line leading into the carb. I darn near killed myself and family because of that. I smelled gas in the cab on that one all the way home from Monroe swap meet. I thought that it was the sending unit seal, seal for the pin that you connect the sending unit wire to, or leaking out the gas cap and the gas following the filler neck into the cab. Turned out to be a broken fuel line leading into the carb. Next, I would check around your filler neck. If your cap is leaking and following the neck back into the cab, you will see evidence of it. Then if that doesn't seam to be the problem, then check the sending unit. There are 2 seals to check there. One is the big "O" ring that seals the unit to the tank, and the other seals the pin that your sending unit wire plugs into. There will be a little nut that you can tighten if that is leaking. Sometimes you get lucky on that, but sometimes you dont. If you tighten the nut too tight you may ground the pin out on the sending unit and it needs to be isolated from it. Good luck. WES www.ClassicHeartbeat.com __________________ On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys

07-15-2004, 03:10 PM	#8
Bill72BB Thats the Hillbilly way Join Date: Jul 2001 Location: Torrance,Ca Posts: 5,979	Thanks for all the suggestions ,Just got back from getting the o ring seal and will check allthe easy stuff B4 replacing it . __________________ BILL Torrance Calif 90504 Member DUF Club Member Old Farts Club 72 3/4ton Custom Camper BB402/400 trans Dynomax Cerama-coat headers , Hei distributor ,Edelbrock 1411 air,ps,pb,leafsprings ,98 chevy 60/40 seat,S10 shoulder belts tilt,3.54 Dana 60 rear. 16" Eagle wheels with LT265/75 16 tires,Gaylord Lid,H4 headlights with 100W relay conversion. " If I knew I was going to live this long I would have taken better care of myself " Marriage changes passion...suddenly you're in bed with a relative. A GUY'S PRAYER.... Lord, I pray for a nympho with huge boobs who owns a liquor store and likes to fish and hunt and has a Harley .Amen ,

07-15-2004, 03:10 PM	#9
Zumo Hot Rods For Life Join Date: Sep 2001 Location: Waxahachie, TX Posts: 3,305	I had a pin hole in the bottom of my tank once. Slow leak but long enough to stink up the cab. I replaced the tank. __________________ 1968 C10 LWB **SOLD* Andy Viva Los Bicicletas! Los Muertos Custom Bicycles

07-15-2004, 03:25 PM	#10
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	Bill, if it's your tank, you can have the one I pulled out of my cab. Let me know quick, as I have to go to Minn Saturday. I can probably find someone going to Pomona who can bring it to you. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com

07-15-2004, 06:04 PM	#12
busterwivell Registered User Join Date: Jan 2002 Location: Sahuarita, AZ USA Posts: 2,033	Anytime. __________________ Bill - Tucson, AZ 47 Chevrolet 2 dr sedan 56 Chevrolet 210 2 dr sedan 66 Chevrolet Malibu 2 dr 4 speed 71 Chevrolet C30 Longhorn 86 Chevrolet Monte Carlo SS (Sold) 01 Chevrolet Tahoe IM - BUSTERWIVE@aol.com



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