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Torque specs for f-body fuel tank bolts??

This is a discussion on Torque specs for f-body fuel tank bolts?? within the General Help forums, part of the LSx Technical Help Section category; Does anyone have the torque specs for the two bolts for the straps that hold the fuel tank in place? ...

  1. #1
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    Torque specs for f-body fuel tank bolts??

    Does anyone have the torque specs for the two bolts for the straps that hold the fuel tank in place? This is for a 1999 Z28.

    Thanks

  2. #2
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Tight..

    Welcome to the site..

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    Quote Originally Posted by Smittro View Post
    Tight..
    That's what I plan to do if no one knows the "official" torques specs. My other option is to use the old standby specification: "tighten it until it feels right."

    Quote Originally Posted by Smittro View Post
    Welcome to the site..
    Thanks very much for the welcome. I actually first joined ls1.com about 1999 or shortly thereafter. I posted many times initially. It has been many years now, though, since I have posted again. My site registration was still active but my posting history seems to have disappeared.

    The site was always very useful. I first looked for the tank specs in a folder I kept on past mods. I found several pages of torque specs I had copied off of ls1.com in 2003 but they did not cover the tank. Even the specs I already had no longer appear to be here anymore.

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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    When I did my 01 camaro fuel pump, I could'nt find any specifics on it either.

    I am sure they exsist but.. eh tight is good..lol

    Did the same just tightened them down till they felt good and called it done.

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    Former Mopar Man 2002ssslp's Avatar
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    Quote Originally Posted by Smittro View Post
    Tight..

    Welcome to the site..
    Smittro is 1/2 right. The exact torque spec. is tight but not too tight. lol
    Smittro likes this.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

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    Quote Originally Posted by 2002ssslp View Post
    Smittro is 1/2 right. The exact torque spec. is tight but not too tight. lol
    So you're suggesting about halfway between tight enough to snap the bolt and loose enough that the tank falls out?

  8. #8
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    Sounds about right. I tighen mine more than snug. Tight, but not enough to snap the bolt.
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    Former Mopar Man 2002ssslp's Avatar
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    Quote Originally Posted by Mr Ed View Post
    So you're suggesting about halfway between tight enough to snap the bolt and loose enough that the tank falls out?
    Oh Mr Ed, you should know better then that. Wilbur always said righty tighty but not tooooo tighty. I would use blue loc tight and go 1/2 turn past snug.

  10. #10
    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Just don't chimp out on them man and you'll be good..

  11. #11
    Spaz is My Mentor SMWS6TA's Avatar
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    Here you go, also a service bulletin.

    Caution! Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.


    Fuel straps are tighten to 24 lb ft


    Here are the procedures

    INSTALLATION PROCEDURE


    1. Install the fuel sender assembly (3) and the rear fuel and EVAP pipes to the fuel tank.



    1. Install the right fuel tank insulator.


      • The fuel sender pipes must route below the left fuel tank insulator.


    1. Align the insulator (2) on the top of the fuel tank with 15-25 mm (O.6 - 1.0 in) of the insulator extending beyond the edge of the fuel tank front flange (3).
    2. Fold the insulator down.
    3. Secure the insulator to the flange (4). The alignment notch on the insulator lines up with the fuel tank flange edge (1).
    4. With the aid of an assistant, position and support the fuel tank.
    5. Position the right fuel tank strap up.
    6. Install the front right fuel tank strap attaching bolt.
    7. Position the EVAP canister vent solenoid bracket (4) between the left fuel tank strap (2) and the underbody bracket (1).
    8. Install the front left fuel tank strap attaching bolt.

    Tighten
    Bolts to 33 Nm (24 lb ft).



    1. Connect the fuel sender and the fuel pressure sensor electrical connectors.
    2. Connect the electrical harness clip (2) to the fuel tank flange (1).
    3. Connect the fuel tank vent valve to the rear brake hose bracket.
    4. Connect the fuel feed pipe at the fuel filter inlet.
    5. Connect the EVAP purge pipe (3).
    6. Connect the fuel return pipe (4).
    7. Connect the EVAP pipes (1) at the EVAP canister (2).
    8. Install the fuel and EVAP pipes into the pipe clip.
    9. Align the fuel and EVAP pipes in a flat position.
    10. Install the pipe clip bolt.

    Tighten
    Bolt to 5.5 Nm (49 lb in).



    1. Install the rear axle assembly.
    2. Install the exhaust system heat shields and attaching screws.
    3. Install the exhaust system.
    4. Install the fuel filler pipe shield.
    5. Lower the vehicle.
    6. Install the fuel tank filler pocket.
    7. Refill the fuel tank.
    8. Install the fuel tiller cap.
    9. Connect the negative battery cable.
    10. Inspect for leaks.



  12. #12
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    Quote Originally Posted by SMWS6TA View Post
    Here you go, also a service bulletin.

    Caution! Tighten the strap fasteners by steps, alternating between the fasteners, until the specified torque is reached. A failure to tighten the strap fasteners as specified will cause the bottom of the tank to flex upward. This will result in the fuel gauge indicating that there is fuel remaining in the tank when the tank is empty.


    Fuel straps are tighten to 24 lb ft


    Here are the procedures
    ...
    SMWS6TA, Thanks a million. If I had gone with my best guess on how much to tighten them, I would definitely have overdone it.


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