22 gal. blazer tank only takes 13 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

my new 72 · 01-12-2005, 05:36 PM

For some stupid reason my blazer tank is only taking a total of 13 gallons when empty. I ran it out of gas today to check it, so I know for sure it is only taking 13. Any ideas why it would only be filling half way? I am going to drop it this weekend to check it out, but I would rather not have to. It is very strange. Thanks.

Vince Putt · 01-12-2005, 07:29 PM

Souns pretty weird, got a vent?

tom hand · 01-12-2005, 07:33 PM

Yep sounds like it is not vented correctly...if you don't have the small vent hose on the fill tube hooked up it will cut the pump off

my new 72 · 01-12-2005, 07:45 PM

It is vented, in fact, it spills out of the vents at 13.5 gallons. I am going to have to run it empty and drop it to see what the deal is.

Longhorn Man · 01-12-2005, 10:35 PM

it's either caved in, or a 13 gallon tank.

doc_rock · 01-13-2005, 12:22 AM

Quote:

Originally Posted by Longhorn Man

it's either caved in, or a 13 gallon tank.

yup. that's what I was thinking. Caved in or imploded.

my new 72 · 01-13-2005, 03:55 AM

Nope. I checked it out to see if it was caved in and a big no goes to that too. I have no clue, it is probably going to be something stupid though.

Longhorn Man · 01-13-2005, 06:29 AM

Quote:

probably going to be something stupid though.

like a small tank?

Woody · 01-13-2005, 08:33 AM

Could be that the pick-up tube isn't all the way to the bottom of the tank and only sucking the top 13.5 gal out of it with the other 8.5 gal still in it. Just a guess.......

mrein3 · 01-13-2005, 08:38 AM

Quote:

Originally Posted by Woody

Could be that the pick-up tube isn't all the way to the bottom of the tank and only sucking the top 13.5 gal out of it with the other 8.5 gal still in it. Just a guess.......

That would be my guess.
Don't run it dry and go dropping it expecting it to be empty.

Mudder · 01-13-2005, 09:01 AM

I was thinking that my daughters tank was a 17 gallon. (72 Blazer).

smokekiki · 01-13-2005, 11:53 AM

Maybe the PO was a bootlegger and has a compartment in the take to hide the booze!When my tank is pretty close to empty it takes 18gal to fill it up.

67ChevyRedneck · 01-13-2005, 12:04 PM

Or maybe some danged neighborhood kids filled your tank full of rocks and sand....that happened to my dad with his '67 'bird. Or a drug runner filled if full of some smack and it's still in there!!! My other question would be: Have you ever filled this tank up to 22 gal. or do you think it's a 22 gal. tank?

my new 72 · 01-13-2005, 02:48 PM

I have indeed put 22 gallons in this tank before. My truck sleeps in the Garage most of the time, but it did spend a few weeks outside while the paint was drying on the Garage floor. But I do know for a fact it is a 22 gallon blazer tank. I was leaning more towards someone putting crap in it. Nice smart ass reply though longhorn man.

greasemonkey · 01-13-2005, 03:57 PM

Woody has a good point, maybe you can run it "dry" and poke a stick in there and see if it comes up dry (or can you do that on a Blazer tank? That used to be my old method on my in cab tank when my gas guage went bad)

my new 72 · 01-13-2005, 06:00 PM

Well, I pulled the tank and found out that the sender float has gas in it showing empty when half full, and one of the fuel filters is clogged and needs replaced. That is why it acted like it was empty. And I emptied 20 gallons out of it.

teamharvey · 01-13-2005, 06:06 PM

OK, makes a bit more sense now. When you said you "ran it out of gas" I thought you meant you ran the tank dry, but actually you were going by the fuel gauge.

Bret

my new 72 · 01-13-2005, 06:10 PM

it seemed to be out of gas because both the gauge read low, and the engine died due to the clogged filter.

67ChevyRedneck · 01-13-2005, 06:16 PM

Glad you got it figured out! If your filter was plugged bad you may want to check the filter in the carb. In my experience if the filter was plugged bad, some crap did get into my carb. I have an edelbrock 650, to me, they are easy to take apart and clean. I know some carbs are a PITA.

my new 72 · 01-13-2005, 06:18 PM

I have two filters inline before the carb. I run an edel. 1411 with one filter before the regulator and one between the reg. and the carb. I will be taking the top off the carb and cleaning it out too.

Longhorn Man · 01-13-2005, 07:40 PM

Hey man, didn't mean to sound like a smart ass...sorry.

Alexis · 01-13-2005, 07:44 PM

Quote:

Originally Posted by Longhorn Man

Hey man, didn't mean to sound like a smart ass...sorry.

You're so rude

Longhorn Man · 01-13-2005, 08:09 PM

I know...thank god I'm dead sexy.

my new 72 · 01-13-2005, 08:17 PM

no worries

*72longbed* · 01-13-2005, 11:25 PM

Saw this Thread and had to share my recent experience with retro tanks. Bought one of those steel blazer tank kits from 'The Truck Shop' in Cali. at Carlisle, put it in behind the rear axle with all the new hardware and sender that came with it. Well, a 72 C20 with a lot of 'rake' (back being about 2.5" higher) must not be the chassis for the guys who make up the sending units. It would never read more than 3/4 full on the gauge, even with gas flowing out the filler neck. Had no problem going all the way to empty, even below empty on the gauge. So one day I pulled the new tank out and took out the sender and bent the float rod so the float went lower into the tank. Did the trick, now when the tank is topped off, the gauge reads very full. Just had to re-learn the hard way where really empty is.

I guess the lesson learned was; don't assume that what you buy aftermarket or even factory is going to be exactly right for 'your' truck.

BTW, anybody else with this tank have trouble with it wanting to feed very slowly?? I've been thinking to try and use the extra fittings at the upper side areas as vents also and sort of 'TEE' them all together to the tube thats welded in to the filler neck?? Do you think this will improve the vent flow?

Thanks,
72longbed

01-12-2005, 05:36 PM	#1
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	22 gal. blazer tank only takes 13 For some stupid reason my blazer tank is only taking a total of 13 gallons when empty. I ran it out of gas today to check it, so I know for sure it is only taking 13. Any ideas why it would only be filling half way? I am going to drop it this weekend to check it out, but I would rather not have to. It is very strange. Thanks. __________________ I'm going to Law School, wanna debate? It's good practice.

01-12-2005, 07:33 PM	#3
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	Yep sounds like it is not vented correctly...if you don't have the small vent hose on the fill tube hooked up it will cut the pump off __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

01-12-2005, 07:45 PM	#4
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	It is vented, in fact, it spills out of the vents at 13.5 gallons. I am going to have to run it empty and drop it to see what the deal is. __________________ I'm going to Law School, wanna debate? It's good practice.

01-13-2005, 03:55 AM	#7
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	Nope. I checked it out to see if it was caved in and a big no goes to that too. I have no clue, it is probably going to be something stupid though. __________________ I'm going to Law School, wanna debate? It's good practice.

01-13-2005, 11:53 AM	#12
smokekiki Mike Join Date: Jan 2003 Location: west chester pa Posts: 2,474	Maybe the PO was a bootlegger and has a compartment in the take to hide the booze!When my tank is pretty close to empty it takes 18gal to fill it up. __________________ 70'c/10, 71 suburban4x4 402bb, 72suburban 4/6 drop, 72k/5 4x4 blazer 4" lift 35 tires

01-12-2005, 07:29 PM	#2
Vince Putt Hippy Join Date: Sep 2004 Location: kaska, pa Posts: 95	Souns pretty weird, got a vent?

01-12-2005, 10:35 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	it's either caved in, or a 13 gallon tank.

01-13-2005, 08:33 AM	#9
Woody Registered User Join Date: Feb 2000 Location: Georgetown, KY, USA Posts: 631	Could be that the pick-up tube isn't all the way to the bottom of the tank and only sucking the top 13.5 gal out of it with the other 8.5 gal still in it. Just a guess.......

01-13-2005, 09:01 AM	#11
Mudder Registered User Join Date: Feb 2001 Location: East Central, MO Posts: 11,336	I was thinking that my daughters tank was a 17 gallon. (72 Blazer).

01-13-2005, 12:04 PM	#13
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Or maybe some danged neighborhood kids filled your tank full of rocks and sand....that happened to my dad with his '67 'bird. Or a drug runner filled if full of some smack and it's still in there!!! My other question would be: Have you ever filled this tank up to 22 gal. or do you think it's a 22 gal. tank? __________________ 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!

01-13-2005, 02:48 PM	#14
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	I have indeed put 22 gallons in this tank before. My truck sleeps in the Garage most of the time, but it did spend a few weeks outside while the paint was drying on the Garage floor. But I do know for a fact it is a 22 gallon blazer tank. I was leaning more towards someone putting crap in it. Nice smart ass reply though longhorn man. __________________ I'm going to Law School, wanna debate? It's good practice.

01-13-2005, 03:57 PM	#15
greasemonkey Registered User Join Date: Dec 2001 Location: Pace, FL Posts: 2,155	Woody has a good point, maybe you can run it "dry" and poke a stick in there and see if it comes up dry (or can you do that on a Blazer tank? That used to be my old method on my in cab tank when my gas guage went bad) __________________ 1942 Master Deluxe 1969 C/10 1985 Blazer CUCV 1987 Jimmy 2004 Tahoe 2005 Silverado 1500 2005 Silverado 3500

01-13-2005, 06:00 PM	#16
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	Well, I pulled the tank and found out that the sender float has gas in it showing empty when half full, and one of the fuel filters is clogged and needs replaced. That is why it acted like it was empty. And I emptied 20 gallons out of it. __________________ I'm going to Law School, wanna debate? It's good practice.

01-13-2005, 06:06 PM	#17
teamharvey Registered User Join Date: Jul 2004 Location: Turlock, Ca Posts: 579	OK, makes a bit more sense now. When you said you "ran it out of gas" I thought you meant you ran the tank dry, but actually you were going by the fuel gauge. Bret __________________ 71 Custom 20 Deluxe..soon to be SWB 1/2 ton 1 incredible wife 2 great kids

01-13-2005, 06:10 PM	#18
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	it seemed to be out of gas because both the gauge read low, and the engine died due to the clogged filter. __________________ I'm going to Law School, wanna debate? It's good practice.



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01-13-2005, 06:16 PM	#19
67ChevyRedneck Hittin E-Z Street on Mud Tires Join Date: Nov 2004 Location: Greenville, SC Posts: 23,090	Glad you got it figured out! If your filter was plugged bad you may want to check the filter in the carb. In my experience if the filter was plugged bad, some crap did get into my carb. I have an edelbrock 650, to me, they are easy to take apart and clean. I know some carbs are a PITA. __________________ 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!

01-13-2005, 06:18 PM	#20
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	I have two filters inline before the carb. I run an edel. 1411 with one filter before the regulator and one between the reg. and the carb. I will be taking the top off the carb and cleaning it out too. __________________ I'm going to Law School, wanna debate? It's good practice.

01-13-2005, 07:40 PM	#21
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Hey man, didn't mean to sound like a smart ass...sorry.

01-13-2005, 08:09 PM	#23
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	I know...thank god I'm dead sexy.

01-13-2005, 08:17 PM	#24
my new 72 faster, faster, faster Join Date: Dec 2001 Location: Houston ,Texas ,USA Posts: 1,354	no worries __________________ I'm going to Law School, wanna debate? It's good practice.

01-13-2005, 11:25 PM	#25
72longbed Account Suspended Join Date: Jun 2003 Location: PA Posts: 1,411	Glass Half Full? Saw this Thread and had to share my recent experience with retro tanks. Bought one of those steel blazer tank kits from 'The Truck Shop' in Cali. at Carlisle, put it in behind the rear axle with all the new hardware and sender that came with it. Well, a 72 C20 with a lot of 'rake' (back being about 2.5" higher) must not be the chassis for the guys who make up the sending units. It would never read more than 3/4 full on the gauge, even with gas flowing out the filler neck. Had no problem going all the way to empty, even below empty on the gauge. So one day I pulled the new tank out and took out the sender and bent the float rod so the float went lower into the tank. Did the trick, now when the tank is topped off, the gauge reads very full. Just had to re-learn the hard way where really empty is. I guess the lesson learned was; don't assume that what you buy aftermarket or even factory is going to be exactly right for 'your' truck. BTW, anybody else with this tank have trouble with it wanting to feed very slowly?? I've been thinking to try and use the extra fittings at the upper side areas as vents also and sort of 'TEE' them all together to the tube thats welded in to the filler neck?? Do you think this will improve the vent flow? Thanks, 72longbed

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