Fuel sender gaskets???

[mikem]

I'm replacing the fuel sender gaskets to cure a leak. The old gaskets
show evidence of extrusion due to overtightening the screws.

How tight should the screws be? (Tight enough to seal, but not tight
enough to deform/cut the gasket?)

Should I use any form of gasket cement between the steel face of the
sender and the gasket?

Between the gasket and the aluminum surface on the tank?

MikeM

[[email protected]]

The only gasket sealer that i would use is Proseal. It's totally fuel proof.



mikem wrote:
> I'm replacing the fuel sender gaskets to cure a leak. The old gaskets
> show evidence of extrusion due to overtightening the screws.
>
> How tight should the screws be? (Tight enough to seal, but not tight
> enough to deform/cut the gasket?)
>
> Should I use any form of gasket cement between the steel face of the
> sender and the gasket?
>
> Between the gasket and the aluminum surface on the tank?
>
> MikeM
>

[kontiki]

mikem wrote:
> I'm replacing the fuel sender gaskets to cure a leak. The old gaskets
> show evidence of extrusion due to overtightening the screws.
>
> How tight should the screws be? (Tight enough to seal, but not tight
> enough to deform/cut the gasket?)
>
> Should I use any form of gasket cement between the steel face of the
> sender and the gasket?
>
> Between the gasket and the aluminum surface on the tank?
>
> MikeM
>

When I put a new fuel cell in my airplane last year it came with all
the gaskets including the sender gasket. It was cork and I used a light
coat of Vaseline only. They shouldn't need any sealer. The torque
spec should be in the maint manual, but its not much. Also retorque
after 24 hrs as the gasket 'sets'.

[mikem]

kontiki wrote:

> When I put a new fuel cell in my airplane last year it came with all
> the gaskets including the sender gasket. It was cork and I used a light
> coat of Vaseline only.

The gaskets are rubber. When I opened the wing bay at annual this year,
the leak was obvious. Three years ago when the senders were replaced,
we put new gaskets in with a thin film of "FuelLube". They leaked just
enough to stain the fuel tank and put a fuel smell into the cockpit and
hangar. The gaskets have developed cracks around the screw holes,
probably because the screws were overtightened, so they must be
replaced. I dont want to be doing this again...