Changing stock gas tank advice - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sb69chevy · 06-01-2007, 04:19 PM

I plan on replacing my stock tank w/ a reprod sometime this summer due to rust inside. I plan on getting a new sending unit and harness as well. Is there anything else I need or should consider while I'm at it? Thanks in advance. sb

sb69chevy · 06-01-2007, 04:20 PM

Oh, and I plan on staying w/ the in-cab tank mainly because I don't have the $$ or skills to do the rear conversion. Thanks again.

BB72CHEVKT · 06-01-2007, 04:32 PM

Pulled a tank last night. Really easy. 8 bolts for seat 8 bolts for gas tank.
remove wire and reinstall.

sb69chevy · 06-01-2007, 05:23 PM

Thanks, bb72. Any other things in should consider ordering will I'm doing this?

sb69chevy · 06-01-2007, 06:21 PM

Which sending unit will I need?

mnunn454 · 06-01-2007, 06:30 PM

Couple of things:

If you're not careful, the gas gauge wire is real easy to pinch, ground or connect poorly.

Make sure the ohms on the new sending unit matches the ohms on the old one. Otherwise the gas gauge will read differently than it did.

Watch out for the rubber o-ring seal that seals the sending unit in. Make sure it's sealed properly.

If there's a vent involved, make sure the hose to it is in good condition.

Good luck.

bowtieride · 06-01-2007, 07:41 PM

You also might want to get another rubber seal for the filler neck on the body. They can be tough removing without damaging the old one. It also might feel like its stuck and theres still something holding it after you get all the bolts out. You just need to pry on it a little.

Texasdeere · 06-01-2007, 07:52 PM

I just insalled one from LMC a month ago. I had to open up the mounting holes a little and I had to tweak the sending unit retainer ring for a tighter fit. It all fits and looks nice with no leaks or fuel smell. I did have to order a different filler cap for the new tank though. My old one was too big and wouldn't fit.

The new sending unit came with a new rubber sealing ring.

sodak69c10 · 06-01-2007, 09:51 PM

Quote:

Originally Posted by bowtieride

You also might want to get another rubber seal for the filler neck on the body. They can be tough removing without damaging the old one. It also might feel like its stuck and theres still something holding it after you get all the bolts out. You just need to pry on it a little.

agree, also never hurts to lube the gasket old/new with a little wd40, other than that sounds like you'll have everything you need they are pretty straight forward i removed my bench seat, tank by myself , just unbolt pull the passanger side out slighty and tip it up, then pull driverside down into cab

,Clint

67ChevyRedneck · 06-01-2007, 10:08 PM

Ok, I don't know the years for this, but some tanks are vented through a charcoal canister under the hood of the truck, and some simply have a vented gas cap. Make sure you order the correct tank/fuel cap combination. There's been quite a few "my truck runs for 5 mins. dies, starts, runs 5 mins and dies" posts

Also, I'm not sure if the extra vent is on the tank itself, or the fuel sending unit... maybe someone else can chime in...

The 67 to whatevers are the vented caps and the whatevers to 72 are the vented charcoal canister... I know that helps a lot

Sorry I don't know more, I just know to make sure to get the same stuff.

06-01-2007, 04:19 PM	#1
sb69chevy Registered User Join Date: Oct 2006 Location: Springfield, MO Posts: 375	Changing stock gas tank advice I plan on replacing my stock tank w/ a reprod sometime this summer due to rust inside. I plan on getting a new sending unit and harness as well. Is there anything else I need or should consider while I'm at it? Thanks in advance. sb __________________ 1969 C/10 swb, 350, powerglide (daily driver) 2005 CRV (wife's ride)

06-01-2007, 04:20 PM	#2
sb69chevy Registered User Join Date: Oct 2006 Location: Springfield, MO Posts: 375	Re: Changing stock gas tank advice Oh, and I plan on staying w/ the in-cab tank mainly because I don't have the $$ or skills to do the rear conversion. Thanks again. __________________ 1969 C/10 swb, 350, powerglide (daily driver) 2005 CRV (wife's ride)

06-01-2007, 04:32 PM	#3
BB72CHEVKT Junior Member Join Date: Mar 2007 Location: Hideaway, TX Posts: 4,950	Re: Changing stock gas tank advice Pulled a tank last night. Really easy. 8 bolts for seat 8 bolts for gas tank. remove wire and reinstall. __________________ 71 Suburban 350/700R4 Project Trixie 72 CHEVY,Highlander,SWB,396,T400

06-01-2007, 05:23 PM	#4
sb69chevy Registered User Join Date: Oct 2006 Location: Springfield, MO Posts: 375	Re: Changing stock gas tank advice Thanks, bb72. Any other things in should consider ordering will I'm doing this? __________________ 1969 C/10 swb, 350, powerglide (daily driver) 2005 CRV (wife's ride)

06-01-2007, 06:21 PM	#5
sb69chevy Registered User Join Date: Oct 2006 Location: Springfield, MO Posts: 375	Re: Changing stock gas tank advice Which sending unit will I need? __________________ 1969 C/10 swb, 350, powerglide (daily driver) 2005 CRV (wife's ride)

06-01-2007, 06:30 PM	#6
mnunn454 Registered User Join Date: Dec 2006 Location: Rhode Island Posts: 602	Re: Changing stock gas tank advice Couple of things: If you're not careful, the gas gauge wire is real easy to pinch, ground or connect poorly. Make sure the ohms on the new sending unit matches the ohms on the old one. Otherwise the gas gauge will read differently than it did. Watch out for the rubber o-ring seal that seals the sending unit in. Make sure it's sealed properly. If there's a vent involved, make sure the hose to it is in good condition. Good luck. __________________ 69 C-10 SWB Fleetside 454/TH400 (For Sale) http://67-72chevytrucks.com/vboard/c...ct=1299&cat=12 70 El Camino 454 TH700 29 Model A 4-DR Sedan Deluxe

06-01-2007, 07:41 PM	#7
bowtieride Registered User Join Date: Mar 2007 Location: Eugene, Oregon Posts: 103	Re: Changing stock gas tank advice You also might want to get another rubber seal for the filler neck on the body. They can be tough removing without damaging the old one. It also might feel like its stuck and theres still something holding it after you get all the bolts out. You just need to pry on it a little. __________________ 1970 LWB 250ci 4 Speed

06-01-2007, 07:52 PM	#8
Texasdeere Registered User Join Date: Sep 2006 Location: League City, Texas Posts: 732	Re: Changing stock gas tank advice I just insalled one from LMC a month ago. I had to open up the mounting holes a little and I had to tweak the sending unit retainer ring for a tighter fit. It all fits and looks nice with no leaks or fuel smell. I did have to order a different filler cap for the new tank though. My old one was too big and wouldn't fit. The new sending unit came with a new rubber sealing ring. Last edited by Texasdeere; 06-01-2007 at 07:54 PM.

06-01-2007, 10:08 PM	#10
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Re: Changing stock gas tank advice Ok, I don't know the years for this, but some tanks are vented through a charcoal canister under the hood of the truck, and some simply have a vented gas cap. Make sure you order the correct tank/fuel cap combination. There's been quite a few "my truck runs for 5 mins. dies, starts, runs 5 mins and dies" posts Also, I'm not sure if the extra vent is on the tank itself, or the fuel sending unit... maybe someone else can chime in... The 67 to whatevers are the vented caps and the whatevers to 72 are the vented charcoal canister... I know that helps a lot Sorry I don't know more, I just know to make sure to get the same stuff. __________________ Jesse James 1967 C10 SWB Stepside: 350/700R4/3.73 1965 Ford Mustang: 289/T5-5spd/3.25 Trac-Loc 1968 Pontiac Firebird: Project Fire Chicken! 2015 Silverado Double Cab 5.3L Z71 2001 Jeep Wrangler Sport 4.0L 5spd 2020 Chevrolet Equinox Premium 2.0L Turbo 2011 Mustang V6 ~ Wife's ride American Born, Country by the Grace of God 1967 CST Shop Truck Rebuild! My 1967 C-10 Build Thread My Vintage Air A/C Install Project "On a Dime" Trying my hand at Home Renovation! 1965 Mustang Modifications! Last edited by 67ChevyRedneck; 06-01-2007 at 10:10 PM.



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