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

sewanhaka62 · 08-13-2002, 03:02 PM

hi

have a problem filling tank--will only take gas with pump running very slow

put a suburban tank [67/72] poly in rear of truck---it had a 1 1/4
od intake--ran pvc pipe the rest of way to boatfill in side of step fender--have 2 vent pipes

any help

4"
-----fender

- 10"
-
tank------
12"

thanks--bob

**JDL** · 08-13-2002, 04:19 PM

you have to vent the air out so it don't come back up the fill line.

sewanhaka62 · 08-13-2002, 05:26 PM

hi

have 2 vent lines---that is what i though was the problem at first

thanks -- bob

HvyChevy454 · 08-13-2002, 05:44 PM

i kinda have the same prolblem expcept its b/c mines in the rear tailight. You do not have enough gravity working for you to get the gas down the tube, you need to raise the filler opening to a higher point above the tank and make sure there is no dips in your filler line where gas can pull as this makes filling a slower process. It used to take me a good solid 15 min to fill the 21 gal tank

bigvinnie · 08-13-2002, 06:26 PM

sounds like you've got enough venting, but any bends in the line would be an area to check.... anything you can do to create a straight line to the tank is optimum... any bends in the line should be gradual.

DennyB · 08-13-2002, 06:46 PM

What kind of pvc did you use?
Gas will eat white pvc. Make sure it's rated for gas!
Also it would only take a few angles in the the pipe to cause this.

another option is to get a long boat gas filler hose in place of the pvc and use gentle curves in the hose and it should be fine. Keep any low pitched lengths to a minimum.

Denny

sewanhaka62 · 08-13-2002, 07:33 PM

hi
intake is about 10" above tank with a 45--dropping to another 45
with about 10 " of straight into tank

thanks all for help--bob

08-13-2002, 03:02 PM	#1
sewanhaka62 Registered User Join Date: Jan 2002 Location: berwick,penn Posts: 98	gas tank hi have a problem filling tank--will only take gas with pump running very slow put a suburban tank [67/72] poly in rear of truck---it had a 1 1/4 od intake--ran pvc pipe the rest of way to boatfill in side of step fender--have 2 vent pipes any help 4" -----fender - 10" - tank------ 12" thanks--bob

08-13-2002, 04:19 PM	#2
JDL Senior Member Join Date: Sep 2000 Location: Agency IA. Posts: 1,848	you have to vent the air out so it don't come back up the fill line. __________________ 72 Chevy short step side with 454 air and tilt. 72 nova project car 63 chevy II drag car Agency Iowa

08-13-2002, 05:44 PM	#4
HvyChevy454 Slowly getting CRSS... Join Date: Jul 2001 Location: Lutz, Florida Posts: 656	i kinda have the same prolblem expcept its b/c mines in the rear tailight. You do not have enough gravity working for you to get the gas down the tube, you need to raise the filler opening to a higher point above the tank and make sure there is no dips in your filler line where gas can pull as this makes filling a slower process. It used to take me a good solid 15 min to fill the 21 gal tank __________________ -Nic Lutz, Fl My Team Website The Heavy Chevy Website ------------------ 72 Cheyenne 10 LWB GM 12-bolt 3.08 w/ Auburn Posi 91 454 Edel Performer RPM Intake 750 cfm carb Comp Cam 268/.495 Hedman Headers Dual 3'' Exhaust 71 Cheyenne 20 4x4 Fact. A/C PS PB Tilt Currently in the works... Speak Softly and Carry A Big Block... There is No replacement for Displacement... "If everything seems under control, you're just not going fast enough." - Mario Andretti

08-13-2002, 06:26 PM	#5
bigvinnie Registered User Join Date: Aug 2001 Location: escondido, ca 92026 Posts: 1,222	sounds like you've got enough venting, but any bends in the line would be an area to check.... anything you can do to create a straight line to the tank is optimum... any bends in the line should be gradual. __________________ '72 short step, 350, 700R4, tilt, ps, pdb, a/c, lowered coils, etc., other work in progress... San Diego, CA 72 Stepside Project

08-13-2002, 06:46 PM	#6
DennyB Led Sled! Discs R 4 ME! Join Date: Jan 2001 Location: Toms River, NJ, USA (Transplanted Hoosier) Posts: 7,327	PVC?????????? What kind of pvc did you use? Gas will eat white pvc. Make sure it's rated for gas! Also it would only take a few angles in the the pipe to cause this. another option is to get a long boat gas filler hose in place of the pvc and use gentle curves in the hose and it should be fine. Keep any low pitched lengths to a minimum. Denny __________________ "Never ride faster than your Angel can fly" I.M.O.M,W,J&C Patriot Guard Rider

08-13-2002, 05:26 PM	#3
sewanhaka62 Registered User Join Date: Jan 2002 Location: berwick,penn Posts: 98	hi have 2 vent lines---that is what i though was the problem at first thanks -- bob

08-13-2002, 07:33 PM	#7
sewanhaka62 Registered User Join Date: Jan 2002 Location: berwick,penn Posts: 98	hi intake is about 10" above tank with a 45--dropping to another 45 with about 10 " of straight into tank thanks all for help--bob



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