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Pulling gas tank

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by Purs, Mar 7, 2000.

  1. Purs

    Purs Registered Member

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    Location:
    West Texas
    any ideas on pulling a gas tank on a '72 4x4 Jimmy? I don't have a manual so any help would be appreciated. My gauge isn't working and I think it's the sending unit. Is there anything I should check before I dive into this? Thanks in advance for the help.
     
  2. mudfanatic

    mudfanatic 1/2 ton status

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    Location:
    Aloha, Oregon
    I did this job last summer, Just be sure that all of the gas is out of the tank before you drop it on your foot and have to go to the podietrist[​IMG]
    Unbolt the ground wire from the frame before you start to unbolt the straps, put some penetrating oil in the end of the filler tube a day or so ahead of time so that you can pull that off easily, and one tip, if you ever see high water replace the short breather tube with a long one, zip tie this to the filler tube and shove it up where the filler tube goes into the side of the body after putting the breather cap on.
    The fuel lines arent that long so you'll have to pull them when you've got the tank at an angle resting on a floor jack then when installing the tank put on a little bit longer lines to make reinstallation easier, I only went with about 4 inches longer per line.
    After you choke at the dealer cost call your local wrecking yards. hook up the new sending unit before you install the tank, have someone sit in the cab while you move the fuel gage back and forth slowly to see if the gage works. if this doesn't work it could also be the dash voltage regulator behind the dash dangling on four 12-14 gage wires.
    '77 K5

    <font color=red>mudfanatic</font color=red>[​IMG]
     
  3. Waxer

    Waxer 1/2 ton status Author

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    Location:
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    My guage wasnt working when I first bought her, so I went to replace the sender as well. come to find out my tank had all kinds of crud in it and was too bad to clean. I paid 127 for a new one and 99 bucks from the dealer for the new sending unit. Hooked it all up and the guage now works like a charm...

    <img src="http://www.geocities.com/waxerk5/waxsk5.jpg"
     
  4. kim tate

    kim tate 1/2 ton status

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    Just finished the same job and agree with mudfanantic. Good advice on the longer lines. You should consider having it pressure tested if it's as old as the truck. Cost me $38 at the local radiator shop. Oh, and while you have it on the ground be careful if you need to heat your garage or do any cutting/welding/grinding, etc. I put a tarp over mine and always carried it outside.
     
  5. Burt4x4

    Burt4x4 3/4 ton status

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    Location:
    California (Modesto area)
    On my 72K5 I replaced the old rusted out tank with a Polyethelane (sp??) tank. Now I don't ever have to worrie about rust and with my metal skid around it it is nice and safe! I also replaced the straps that hold it to the frame.
    Good luck
    Burt4x4

    Rock ON!
     
  6. **b**

    **b** 1/2 ton status

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    Location:
    KIllington, VT.
    you should give your dealer a hug
    mine bent me over the counter
    and took $300.00 for a sending
    unit on my 87 not including pump.
    iam still kind of sore...
     
  7. MICHIGAN BLAZER

    MICHIGAN BLAZER 1/2 ton status

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    Location:
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    i hear ya ***b***, i started crying when i read $99 bucks for a sending unit. i bought the parts and had a shop install the tank for me...i was affraid that i wouldn't be able to get all the rusted stuff off. Well the shop semi twisted the lines on the sending unit & said they most likely wouldn't be able to put it back on w/o twisting them completely. had to buy new unit from the dealer ( i tried desperately to find from somewhere else)...only one dealer in town even had one.....$375!!! total bill for the day $600. that didn't include the gas tank and straps i bought...add another $150.....then on the way home my alternator froze up right in a friends driveway.

    <font color=red>MICHIGAN BLAZER
    <font color=green>89 Fullsize Blazer
    87 Cherokee
    65 IH Scout
     

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