83 fuel tank leak question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rigid · 12-10-2016, 07:31 PM

like always i wait until the last minute .. put the blade on because we have snow coming . filled with fuel . truck sat all summer and now have a leak . I have a plastic tank on a bare frame that I can get to easily . It only has two lines off the top . I would guess supply and return ? The one on the truck now has three lines . Can I make the plastic tank work ? Have a couple drives to blade and not sure if it will run off the passenger tank .
Thank you

68c10airstream · 12-10-2016, 07:49 PM

The lines are part of the sender?? Use your old sender in the new tank?? Welcome aboard!!

Low69CST · 12-10-2016, 09:49 PM

Check the filler hose. Might be leaking since you noticed during a fill up

rigid · 12-10-2016, 10:01 PM

low 69 - I could not be that lucky ! The filler end and neck area look dry . The front end ,under cab , is where it seems to be leaking . I would use the passenger tank for time being except when I push the switch the gauge goes completely past full and off the chart . there may be couple gallons , but not full . any idea what that issue may be ?
Thank you

Low69CST · 12-10-2016, 11:05 PM

My 87 (tbi) wouldn't run off the passenger tank. Also, the gauge did just as you described. A selector valve, sending unit, and fuel pump later it's fixed. I think the funny readings is the ground. It could be the connection at the frame. My sending units literally rusted in two. I don't know how to advise you other than tear into it and see what you find.

Also, I haven't liked other poly tanks. I'd get a metal one.

rigid · 12-10-2016, 11:44 PM

Thanks . I will tear into it in the morning . This is an 83 so it has a carb with the block mount pump. i need to figure out the ground problem also .

**hatzie** · 12-11-2016, 01:02 AM

The carb and diesel ground is a pigtail with ring terminal on the frame end and a 1/4" female disconnect that plugs into a blade on the sender or the tank ring around it.

rigid · 12-11-2016, 11:49 AM

thank you . should be able to find that

12-10-2016, 07:31 PM	#1
rigid Registered User Join Date: Apr 2016 Location: big city Posts: 20	83 fuel tank leak question like always i wait until the last minute .. put the blade on because we have snow coming . filled with fuel . truck sat all summer and now have a leak . I have a plastic tank on a bare frame that I can get to easily . It only has two lines off the top . I would guess supply and return ? The one on the truck now has three lines . Can I make the plastic tank work ? Have a couple drives to blade and not sure if it will run off the passenger tank . Thank you

12-10-2016, 07:49 PM	#2
68c10airstream Registered User Join Date: Mar 2013 Location: Marquette michigan Posts: 828	Re: 83 fuel tank leak question The lines are part of the sender?? Use your old sender in the new tank?? Welcome aboard!!

12-10-2016, 09:49 PM	#3
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	Re: 83 fuel tank leak question Check the filler hose. Might be leaking since you noticed during a fill up __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

12-10-2016, 10:01 PM	#4
rigid Registered User Join Date: Apr 2016 Location: big city Posts: 20	Re: 83 fuel tank leak question low 69 - I could not be that lucky ! The filler end and neck area look dry . The front end ,under cab , is where it seems to be leaking . I would use the passenger tank for time being except when I push the switch the gauge goes completely past full and off the chart . there may be couple gallons , but not full . any idea what that issue may be ? Thank you

12-10-2016, 11:05 PM	#5
Low69CST Registered User Join Date: May 2000 Location: Frankfort, Kentucky, USA Posts: 2,163	Re: 83 fuel tank leak question My 87 (tbi) wouldn't run off the passenger tank. Also, the gauge did just as you described. A selector valve, sending unit, and fuel pump later it's fixed. I think the funny readings is the ground. It could be the connection at the frame. My sending units literally rusted in two. I don't know how to advise you other than tear into it and see what you find. Also, I haven't liked other poly tanks. I'd get a metal one. Attached Images __________________ '69 CST Short fleetside Lowered, 400 small block, 700R4, 4 wheel disc brakes, front sway bar & rear camaro sway bar (in progress) '87 V10 4x4 Short Fleetside Quad Suspension and Dual Tanks

12-10-2016, 11:44 PM	#6
rigid Registered User Join Date: Apr 2016 Location: big city Posts: 20	Re: 83 fuel tank leak question Thanks . I will tear into it in the morning . This is an 83 so it has a carb with the block mount pump. i need to figure out the ground problem also .

12-11-2016, 01:02 AM	#7
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: 83 fuel tank leak question The carb and diesel ground is a pigtail with ring terminal on the frame end and a 1/4" female disconnect that plugs into a blade on the sender or the tank ring around it. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

12-11-2016, 11:49 AM	#8
rigid Registered User Join Date: Apr 2016 Location: big city Posts: 20	Re: 83 fuel tank leak question thank you . should be able to find that



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