How do you drain the gas tank? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

crm318 · 10-07-2010, 04:01 PM

My truck was sitting up for a couple of days (with the gas cap off) and now I am able to get it up and running again. I want to drain the tank of the old gas. How might I do this? I took the big sending line off of the tank and nothing came out, yet when I blew through it, I could here bubbles and the tank reads half full. What do yall think?

clear · 10-07-2010, 04:41 PM

If the tank is original might not hurt to pull it out and empty it then get it boiled out or cleaned.

cdowns · 10-07-2010, 04:53 PM

go under cab,remove the small lenth of rubber tubing, replase with a longer piece of tube that you put in a suitable container then remove gas cap and lopressure air hose and rags tight around the filler neck // that will push the majority of the gas out the tank

crm318 · 10-07-2010, 06:16 PM

Had I got your post a little earlier cdowns, I would have tried that. It sounds like a good idea. I ended up pulling the tank and emptying it out. It was a good learning experience and it was cool to see how it worked. Thanks guys.

68gmsee · 10-07-2010, 07:09 PM

If you wanted to do a complete drain and refill, then you did the right thing.

Pulling the hose from the bottom will get most of the gas out so it will be easier to handle but there will be a few gallons left on the bottom -and that's where all the junk is.

10-07-2010, 04:01 PM	#1
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	How do you drain the gas tank? My truck was sitting up for a couple of days (with the gas cap off) and now I am able to get it up and running again. I want to drain the tank of the old gas. How might I do this? I took the big sending line off of the tank and nothing came out, yet when I blew through it, I could here bubbles and the tank reads half full. What do yall think? __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

10-07-2010, 04:41 PM	#2
clear Registered User Join Date: Aug 2009 Location: NM Posts: 46	Re: How do you drain the gas tank? If the tank is original might not hurt to pull it out and empty it then get it boiled out or cleaned.

10-07-2010, 04:53 PM	#3
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: How do you drain the gas tank? go under cab,remove the small lenth of rubber tubing, replase with a longer piece of tube that you put in a suitable container then remove gas cap and lopressure air hose and rags tight around the filler neck // that will push the majority of the gas out 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

10-07-2010, 06:16 PM	#4
crm318 Alright Alright Alright Join Date: Mar 2004 Location: Midland, Texas Posts: 1,672	Re: How do you drain the gas tank? Had I got your post a little earlier cdowns, I would have tried that. It sounds like a good idea. I ended up pulling the tank and emptying it out. It was a good learning experience and it was cool to see how it worked. Thanks guys. __________________ 1972 Cheyenne Chevrolet red and white 357ci, Vortec heads, GM Performance high rise intake, Comp 268H .454/.454 218/218 110 LSA Quadrajet carb, Flowtech headers, 2.25 40 series HEI, Curve kit, TH 350, 3.07 gears 275/60/15s on 15x8 rallies

10-07-2010, 07:09 PM	#5
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: How do you drain the gas tank? If you wanted to do a complete drain and refill, then you did the right thing. Pulling the hose from the bottom will get most of the gas out so it will be easier to handle but there will be a few gallons left on the bottom -and that's where all the junk is.

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