Torque specs for f-body fuel tank bolts??

**Mr Ed** · 08-18-2012, 08:06 PM

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

**Smittro** · 08-19-2012, 02:18 AM

Tight..

Welcome to the site..

**Mr Ed** · 08-19-2012, 09:21 AM

Originally Posted by Smittro

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."

Originally Posted by Smittro

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.

**Smittro** · 08-19-2012, 01:01 PM

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.

**2002ssslp** · 08-19-2012, 01:02 PM

Originally Posted by Smittro

Tight..

Welcome to the site..

Smittro is 1/2 right. The exact torque spec. is tight but not too tight. lol

**Smittro** · 08-19-2012, 01:10 PM

**Mr Ed** · 08-19-2012, 03:03 PM

Originally Posted by 2002ssslp

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?

***Ed Blown Vert*** · 08-19-2012, 03:06 PM

Sounds about right. I tighen mine more than snug. Tight, but not enough to snap the bolt.

**2002ssslp** · 08-19-2012, 04:05 PM

Originally Posted by Mr Ed

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.

**Smittro** · 08-20-2012, 03:51 AM

Just don't chimp out on them man and you'll be good..

***SMWS6TA*** · 08-21-2012, 09:48 AM

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

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

Install the right fuel tank insulator.

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

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).
Fold the insulator down.
Secure the insulator to the flange (4). The alignment notch on the insulator lines up with the fuel tank flange edge (1).
With the aid of an assistant, position and support the fuel tank.
Position the right fuel tank strap up.
Install the front right fuel tank strap attaching bolt.
Position the EVAP canister vent solenoid bracket (4) between the left fuel tank strap (2) and the underbody bracket (1).
Install the front left fuel tank strap attaching bolt.

Tighten
Bolts to 33 Nm (24 lb ft).

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

Tighten
Bolt to 5.5 Nm (49 lb in).

Install the rear axle assembly.
Install the exhaust system heat shields and attaching screws.
Install the exhaust system.
Install the fuel filler pipe shield.
Lower the vehicle.
Install the fuel tank filler pocket.
Refill the fuel tank.
Install the fuel tiller cap.
Connect the negative battery cable.
Inspect for leaks.

1. Turn the ignition switch ON for 2 seconds.
2. Turn the ignition switch OFF for 10 seconds.
3. Turn the ignition switch ON.
4. Visually Inspect the fuel system for fuel leaks.

**Mr Ed** · 08-24-2012, 05:48 AM

Originally Posted by SMWS6TA

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.