First full tank and i've got gas in the cab! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

whitesswj · 04-21-2005, 06:06 PM

I filled my new pickup up today and when i got in i smelled gas real bad. Thought it was just b/c i just filled up. looked between the bucket seats and i've got a pool of Fuel on the sending unit and draining down the tank.

It looks like it't comming from the electric connection of the sending unit and it pours out when i take a left turn. I've got another tank in the bed of the truck that came from a 67 and the one that's hooked up has all of the vents hooked up to it and they've been all plugged off.

should i switch tanks or sending units??

sswj

kaycee · 04-21-2005, 06:31 PM

I would start with the sending unit,There is a big o-ring that goes with it that might be the culprit allso.

jhwkns · 04-21-2005, 07:57 PM

Do you have a vented cap? If everything's plugged off pressure can build if the cap isn't vented. You might try switching sending units, and installing it with a new seal..

whitesswj · 04-21-2005, 11:43 PM

Quote:

Originally Posted by jhwkns

Do you have a vented cap? If everything's plugged off pressure can build if the cap isn't vented. You might try switching sending units, and installing it with a new seal..

i've got the locking cap that i used on my other pickup and no, it's not vented, i don't think.

who carries that big o-ring?

thanks sswj

jhwkns · 04-21-2005, 11:48 PM

Quote:

Originally Posted by whitesswj

who carries that big o-ring?

thanks sswj

Dealer should have one.

whitesswj · 04-22-2005, 02:01 AM

Quote:

Originally Posted by jhwkns

Dealer should have one.

can i get one at the part's store?

and how do you remove the sending unit?

sswj

**pjmoreland** · 04-22-2005, 02:53 AM

You might be able to special order the seal at a parts store, but I doubt they'll have one in stock. You can order one from www.gmcpauls.com for $2.95 plus shipping.

To remove the sending unit, first detach the fuel line and the brown wire. Then take a hammer and a big straight-blade screwdriver and tap on the tabs of the locking ring so that the locking ring rotates counterclockwise. You'll have to tap a little on one tab and then a little on another, working your way around. Once the ring rotates a little ways (somewhere around a quarter of a turn or so), it will pop loose.

GMC AMI · 04-22-2005, 04:39 AM

This is a new in pack vented chrome cap that will solve the pressure problem.
I had the same problem with my 68 when I put on a non-vented locking cap.
9.99 shipped to your door if interested.

whitesswj · 04-22-2005, 09:13 AM

Quote:

Originally Posted by Mike Files

This is a new in pack vented chrome cap that will solve the pressure problem.
I had the same problem with my 68 when I put on a non-vented locking cap.
9.99 shipped to your door if interested.

do they make a locking vented cap?

GMC AMI · 04-22-2005, 11:13 AM

Yes, they make locking ones. You just have to make sure it is vented since they have both kinds.

RainFade · 04-22-2005, 12:28 PM

Quote:

Originally Posted by Mike Files

This is a new in pack vented chrome cap that will solve the pressure problem.
I had the same problem with my 68 when I put on a non-vented locking cap.
9.99 shipped to your door if interested.

I assume that is a stant ?
Would you be kind enough to list the part number.
I ask as I recently got what was supposed to be a vented cap for my 71 and it builds a LOT of pressure or vacuum depending on conditions and I'll bet it is either the wrong one or needs the pressure spring cut down.

Thanks

ChevyDude · 04-22-2005, 01:47 PM

I would start thinking about re-locating your tank...out of the cab and under the bed!

joelboxt · 04-22-2005, 04:41 PM

Mike,

is that cap your selling is that a repro cap? exactly like the original or simillar to the original?

joel

GMC AMI · 04-23-2005, 07:31 PM

Yes Joel, It is a perfect repo vented cap that I have used on all my trucks except the 72's. No leaks,
perfect chrome and if you wish to remove the warning label, no prob. Just not for 72 models, due to diff. size fill tubes due to Darn un-leaded fuel! I use this cap unless leaving the truck in a high crime area, ha-ha not likely up here. Then I would switch to the locking chrome if parked in such an area for a time if worried about a gas rip-off?
I think the plain chrome looks way better than the keyed cap, more original?

Lorrai · 04-28-2005, 04:59 PM

speaking of full tanks and gas leaks, when I fill mine up all the way fuel starts pouring out as it tops off.. Is this just the tank? I am concerned about my fuel evaporating from this.

jeffnstef · 04-28-2005, 05:27 PM

DO NOT use the vacuum at the "do it yourself carwash" to suck the gas out of the cab.

Yes I am speaking from experience

Inspector722 · 04-28-2005, 05:41 PM

I know it was not funny at the time, but now.

04-21-2005, 06:06 PM	#1
whitesswj Embrace the Redneck Join Date: Jan 2004 Location: Cabot, AR Posts: 1,334	First full tank and i've got gas in the cab! I filled my new pickup up today and when i got in i smelled gas real bad. Thought it was just b/c i just filled up. looked between the bucket seats and i've got a pool of Fuel on the sending unit and draining down the tank. It looks like it't comming from the electric connection of the sending unit and it pours out when i take a left turn. I've got another tank in the bed of the truck that came from a 67 and the one that's hooked up has all of the vents hooked up to it and they've been all plugged off. should i switch tanks or sending units?? sswj __________________ '01 Camaro *Son, you just can't get there from here...*

04-21-2005, 06:31 PM	#2
kaycee Registered User Join Date: Jan 2000 Location: Wyoming USA Posts: 2,445	I would start with the sending unit,There is a big o-ring that goes with it that might be the culprit allso. __________________ 2001 Silverado K-1500 2005 FXDWG stage3 69 CHEVY Short/Step 327/4L60 373 posi 63 IMPALA 327 Last edited by kaycee; 04-21-2005 at 06:32 PM.

04-21-2005, 07:57 PM	#3
jhwkns Registered Cruiser Join Date: May 2002 Location: Las Vegas NV Posts: 2,230	Do you have a vented cap? If everything's plugged off pressure can build if the cap isn't vented. You might try switching sending units, and installing it with a new seal.. __________________ I intend to live forever. So far, so good.

04-22-2005, 04:39 AM	#8
GMC AMI Registered User Join Date: Apr 2004 Location: The Other Maine! Posts: 2,236	Vented gas cap. This is a new in pack vented chrome cap that will solve the pressure problem. I had the same problem with my 68 when I put on a non-vented locking cap. 9.99 shipped to your door if interested. Attached Images __________________ 1968 Chevy 4x4 307 4 speed

04-22-2005, 11:13 AM	#10
GMC AMI Registered User Join Date: Apr 2004 Location: The Other Maine! Posts: 2,236	Yes, they make locking ones. You just have to make sure it is vented since they have both kinds. __________________ 1968 Chevy 4x4 307 4 speed

04-22-2005, 02:53 AM	#7
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,340	You might be able to special order the seal at a parts store, but I doubt they'll have one in stock. You can order one from www.gmcpauls.com for $2.95 plus shipping. To remove the sending unit, first detach the fuel line and the brown wire. Then take a hammer and a big straight-blade screwdriver and tap on the tabs of the locking ring so that the locking ring rotates counterclockwise. You'll have to tap a little on one tab and then a little on another, working your way around. Once the ring rotates a little ways (somewhere around a quarter of a turn or so), it will pop loose.

04-22-2005, 01:47 PM	#12
ChevyDude Senior Member Join Date: Jun 2003 Location: Westminster, CO Posts: 3,071	I would start thinking about re-locating your tank...out of the cab and under the bed! __________________ Alex 1971 Lil' Red 350 SBC 700R4

04-22-2005, 04:41 PM	#13
joelboxt 71 Cheyenne SWB Fleetside Join Date: Jan 2005 Location: Sarnia, Ontario, Canada Posts: 403	Mike, is that cap your selling is that a repro cap? exactly like the original or simillar to the original? joel __________________

04-23-2005, 07:31 PM	#14
GMC AMI Registered User Join Date: Apr 2004 Location: The Other Maine! Posts: 2,236	Yes Joel, It is a perfect repo vented cap that I have used on all my trucks except the 72's. No leaks, perfect chrome and if you wish to remove the warning label, no prob. Just not for 72 models, due to diff. size fill tubes due to Darn un-leaded fuel! I use this cap unless leaving the truck in a high crime area, ha-ha not likely up here. Then I would switch to the locking chrome if parked in such an area for a time if worried about a gas rip-off? I think the plain chrome looks way better than the keyed cap, more original? __________________ 1968 Chevy 4x4 307 4 speed

04-28-2005, 04:59 PM	#15
Lorrai Registered User Join Date: Dec 2003 Location: ARIZONA Posts: 13	speaking of full tanks and gas leaks, when I fill mine up all the way fuel starts pouring out as it tops off.. Is this just the tank? I am concerned about my fuel evaporating from this.

04-28-2005, 05:27 PM	#16
jeffnstef Registered User Join Date: Dec 2004 Location: Manchester, NH Posts: 64	DO NOT use the vacuum at the "do it yourself carwash" to suck the gas out of the cab. Yes I am speaking from experience

04-28-2005, 05:41 PM	#17
Inspector722 Fixing my 67, & loving it Join Date: Jun 2004 Location: Bridge City, Texas Posts: 524	I know it was not funny at the time, but now. __________________ Email address- inspector722@aol.com Zip Code- 77611 Shipping- DHL & USPS Working on: 67, large back glass, 307 V8, 200 4R, 3.73 rearend, Short Stepside Bed



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