Gas Tank Neck gasket - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bartstoy · 09-20-2006, 01:38 AM

I need to replace the gasket around the gas tank neck, yes the tank is still in my cab, the last time this was done was when I did the rebuild and had the tank out of the cab. Is there a kind of easy way to replace this thing without removing the tank again?

qksilver · 09-20-2006, 01:40 AM

soapy water, or silicone spray.........cut the old one off but use some kind of lube and go slow to install the new one

oj70chevy · 09-20-2006, 08:41 AM

Bartstoy, If you do this with out taking out your tank could you please take some pics cuse this is something I am wanting to do.

Thanks

72-stomper · 09-20-2006, 09:21 AM

Very good question.....I have to do mine tonight also...
I heard NOT to use vasoline as a lube, as it is a petrolumn base product that will deteriorate the rubber,.

72-stomper · 09-21-2006, 07:02 AM

ttt

gator2511 · 09-21-2006, 07:09 AM

ArmorAll works.

Hook'em · 09-21-2006, 09:50 AM

I understand, from commercials of course, that there are some "personal lubricants" on the market that are water based.

bartstoy · 09-21-2006, 03:32 PM

Thanks to all for your responses, going try some Armorall, and if that is a problem then some silicone grease. Will try and get some pix.

70GMCer · 09-21-2006, 03:42 PM

Never understood the big deal on replacing these. I just cut the old one out, clean the neck, then I use a light film of "Vasoline" on the neck of the tank and on the opening of in the cab. Putting light pressure on the rubber as you turn onto the neck. Slips right on every time. I've never had any problems using Vasoline. I just wipe off any excess after it's on.

72-stomper · 09-22-2006, 07:18 AM

I was told vasoline will shorten the life of the rubber.

avejoe · 09-22-2006, 09:40 PM

Quote:

Originally Posted by 72-stomper

I was told vasoline will shorten the life of the rubber.

There's a joke there somewhere. Almost too easy.

*rage'nrat638* · 09-22-2006, 10:32 PM

my rubber leaks and don't fit very well

and after only 4 months of use its cracking from the sun uv rays and i put it on dry

oj70chevy · 09-27-2006, 02:33 PM

TTT any update on the install?

70c10 · 09-22-2006, 07:24 AM

I've always used dish liquid and never had a problem.

bartstoy · 09-22-2006, 07:19 PM

Here is an update. The old one was hard to take out. But after cutting it in a couple of spots I was able to pull it through from inside the cab. To my surprise the neck of the gas tank is not centered in the hole. The new gasket does not slip in with any lubricant that I have tried, including dish soap, armorall and or silicone oil. If I new how to add pictures to my post I could show you what I am talking about. Anybody else run into this problem. I don' think removing the tank would make it easier, but I am willing to try anything at this point.

gator2511 · 09-22-2006, 07:26 PM

If you can get to the bolts that hold the tank in you can loosen them off a little and move the tank nozzle where you need it. Mine wasn't dead center in the hole but with a little pressure and Armor All it popped in place.

bartstoy · 09-27-2006, 07:31 PM

First of all it's not a gasket as I have been calling it, it's a grommit. eh!

Ran into another problem, there are two grommits that are used on these trucks, one is a 67-69, the other a 69-72. My original purchase turns out to be a 67-69 and the outside diameter is not big enough to fill the gap. I think if the neck were dead center it might work, but barely. So I have ordered the grommit for the 69-72. To loosen the gas tank seems simple enough, but I don't wan't to do that until I have the right grommit. So stay tuned.

09-20-2006, 01:38 AM	#1
bartstoy Registered User Join Date: Feb 2004 Location: El Cajon, Cal. Posts: 75	Gas Tank Neck gasket I need to replace the gasket around the gas tank neck, yes the tank is still in my cab, the last time this was done was when I did the rebuild and had the tank out of the cab. Is there a kind of easy way to replace this thing without removing the tank again? __________________ Original owner '69 C20, long, fleet. 454 BB with Edelbrock stuff. Work truck for years, 2nd restoration going on. '69 C20 '03 Tahoe Z71 70 Hp Johnson pushing aluminum bass boat. All things in life are uncertain, so eat dessert first.

09-20-2006, 01:40 AM	#2
qksilver Senior Member Join Date: Dec 2004 Location: Southern Pines NC Posts: 3,853	Re: Gas Tank Neck gasket soapy water, or silicone spray.........cut the old one off but use some kind of lube and go slow to install the new one

09-20-2006, 08:41 AM	#3
oj70chevy 250 V-6 Club Join Date: Feb 2005 Location: San antonio, TX. Posts: 898	Re: Gas Tank Neck gasket Bartstoy, If you do this with out taking out your tank could you please take some pics cuse this is something I am wanting to do. Thanks __________________ 1970 Chevy C/10 6 Cyl. 43k original miles all factory .http://67-72chevytrucks.com/vboard/s...d.php?t=197523 Never ask a stupid question unless you want a stupid answer .

09-20-2006, 09:21 AM	#4
72-stomper Registered User Join Date: Nov 2005 Location: wisconsin Posts: 142	Re: Gas Tank Neck gasket Very good question.....I have to do mine tonight also... I heard NOT to use vasoline as a lube, as it is a petrolumn base product that will deteriorate the rubber,.

09-21-2006, 07:02 AM	#5
72-stomper Registered User Join Date: Nov 2005 Location: wisconsin Posts: 142	Re: Gas Tank Neck gasket ttt

09-21-2006, 07:09 AM	#6
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: Gas Tank Neck gasket ArmorAll works.

09-21-2006, 09:50 AM	#7
Hook'em Senior Member Join Date: Jul 2004 Location: Round Rock, Texas Posts: 858	Re: Gas Tank Neck gasket I understand, from commercials of course, that there are some "personal lubricants" on the market that are water based. __________________ Hook'em

09-21-2006, 03:32 PM	#8
bartstoy Registered User Join Date: Feb 2004 Location: El Cajon, Cal. Posts: 75	Re: Gas Tank Neck gasket Thanks to all for your responses, going try some Armorall, and if that is a problem then some silicone grease. Will try and get some pix. __________________ Original owner '69 C20, long, fleet. 454 BB with Edelbrock stuff. Work truck for years, 2nd restoration going on. '69 C20 '03 Tahoe Z71 70 Hp Johnson pushing aluminum bass boat. All things in life are uncertain, so eat dessert first.

09-21-2006, 03:42 PM	#9
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: Gas Tank Neck gasket Never understood the big deal on replacing these. I just cut the old one out, clean the neck, then I use a light film of "Vasoline" on the neck of the tank and on the opening of in the cab. Putting light pressure on the rubber as you turn onto the neck. Slips right on every time. I've never had any problems using Vasoline. I just wipe off any excess after it's on. __________________ 1997 GMC Sierra Ext 1965 Mustang

09-22-2006, 07:18 AM	#10
72-stomper Registered User Join Date: Nov 2005 Location: wisconsin Posts: 142	Re: Gas Tank Neck gasket I was told vasoline will shorten the life of the rubber.

09-22-2006, 10:32 PM	#12
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	Re: Gas Tank Neck gasket my rubber leaks and don't fit very well and after only 4 months of use its cracking from the sun uv rays and i put it on dry

09-27-2006, 02:33 PM	#13
oj70chevy 250 V-6 Club Join Date: Feb 2005 Location: San antonio, TX. Posts: 898	Re: Gas Tank Neck gasket TTT any update on the install? __________________ 1970 Chevy C/10 6 Cyl. 43k original miles all factory .http://67-72chevytrucks.com/vboard/s...d.php?t=197523 Never ask a stupid question unless you want a stupid answer .

09-22-2006, 07:24 AM	#14
70c10 67-72 Addict! Join Date: Feb 2002 Location: The TAX State! Posts: 7,857	Re: Gas Tank Neck gasket I've always used dish liquid and never had a problem. __________________ 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

09-22-2006, 07:19 PM	#15
bartstoy Registered User Join Date: Feb 2004 Location: El Cajon, Cal. Posts: 75	Re: Gas Tank Neck gasket Here is an update. The old one was hard to take out. But after cutting it in a couple of spots I was able to pull it through from inside the cab. To my surprise the neck of the gas tank is not centered in the hole. The new gasket does not slip in with any lubricant that I have tried, including dish soap, armorall and or silicone oil. If I new how to add pictures to my post I could show you what I am talking about. Anybody else run into this problem. I don' think removing the tank would make it easier, but I am willing to try anything at this point. __________________ Original owner '69 C20, long, fleet. 454 BB with Edelbrock stuff. Work truck for years, 2nd restoration going on. '69 C20 '03 Tahoe Z71 70 Hp Johnson pushing aluminum bass boat. All things in life are uncertain, so eat dessert first.

09-22-2006, 07:26 PM	#16
gator2511 Registered User Join Date: Mar 2005 Location: tampa florida Posts: 776	Re: Gas Tank Neck gasket If you can get to the bolts that hold the tank in you can loosen them off a little and move the tank nozzle where you need it. Mine wasn't dead center in the hole but with a little pressure and Armor All it popped in place. Last edited by gator2511; 09-22-2006 at 07:30 PM.



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09-27-2006, 07:31 PM	#17
bartstoy Registered User Join Date: Feb 2004 Location: El Cajon, Cal. Posts: 75	Re: Gas Tank Neck gasket First of all it's not a gasket as I have been calling it, it's a grommit. eh! Ran into another problem, there are two grommits that are used on these trucks, one is a 67-69, the other a 69-72. My original purchase turns out to be a 67-69 and the outside diameter is not big enough to fill the gap. I think if the neck were dead center it might work, but barely. So I have ordered the grommit for the 69-72. To loosen the gas tank seems simple enough, but I don't wan't to do that until I have the right grommit. So stay tuned. __________________ Original owner '69 C20, long, fleet. 454 BB with Edelbrock stuff. Work truck for years, 2nd restoration going on. '69 C20 '03 Tahoe Z71 70 Hp Johnson pushing aluminum bass boat. All things in life are uncertain, so eat dessert first.

Register or Log In To remove these advertisements.