I've had more than my share of leaky reserve taps too.
In my case the problem has been solved by simply
turning on the ignition and pumping fuel every few days.
The seal is cork-if it dries out it leaks-if it remains
wet it doesn't.On Thu, 29 Sep 2005 20:48:42 -0500 Lew
Palmer <lpalmer@roundaboutmanor.com> wrote:
> Terry,
>
> I had more than my share of issues with the fuel switchover valves. I have a
> few recommendations:
>
> 1) Be sure the bore in the body of the valve is EXACTLY 1/2" in diameter and
> the Teflon/cork insert is sized to matched or a little bigger. NO SLOP is
> allowed.
>
> 2) Consider going back to cork instead of the Teflon. Although the cork will
> shrink when dry, it will also expand when wet. Therefore if you start with a
> VERY dry cork (a wine bottle cork well aged works well) and cut it using a
> carpenter's plug cutting drill of 1/2" in diameter, you'll wind up with an
> insert the right diameter to begin with. Then a 45 degree slice and a 1/8"
> center hole will make an ideal insert. Since it was sized dry, it has
> nowhere to go but to swell when wet with fuel.
>
> 3) Be sure the pipe fittings that mate with the switchover valve are tight
> and don't leak air. This is also true of any fittings between the valve and
> the fuel pump. They MUST be leak free or it will suck air.
>
> 4) Before you try to get fuel to pass, remove the cork and let it sit in
> fuel so it is lightly saturated. This will cause it to swell enough that you
> will have an air-tight valve.
>
> One or more of those suggestions has worked for me every time. You'll have
> to repeat the process in the spring when the car has not pumped fuel for a
> long time.
>
> Cheers,
> Lew Palmer
>
> -----Original Message-----
> From: owner-mg-mmm@autox.team.net [mailto:owner-mg-mmm@autox.team.net] On
> Behalf Of TATERRY@aol.com
> Sent: Thursday, September 29, 2005 7:18 PM
> To: mg-mmm@autox.team.net
> Subject: N type petrol tank vent...
>
> Thanks to Terry Andrews, I can report that the original Bonora cap does
> infact have a vent drilled in it. It is drilled at a 45 right through the
> spine of
> the pivoting top....hard to see unless you know its there. Borora's were
> original on the N types.
>
> Now how to stop the reserve valve to stop leaking air........!
> Terry
>
> /// unsubscribe/change address requests to majordomo@autox.team.net or try
> /// http://www.team.net/cgi-bin/majorcool
> /// http://www.team.net/mailman/listinfo
> /// Archives at http://www.team.net/archive/mg-mmm
> /// Send list postings to mg-mmm@autox.team.net
>
> /// unsubscribe/change address requests to majordomo@autox.team.net or try
> /// http://www.team.net/cgi-bin/majorcool
> /// http://www.team.net/mailman/listinfo
> /// Archives at http://www.team.net/archive/mg-mmm
> /// Send list postings to mg-mmm@autox.team.net
>
----------------------
David Stansbie
David.Stansbie@bristol.ac.uk
/// unsubscribe/change address requests to majordomo@autox.team.net or try
/// http://www.team.net/cgi-bin/majorcool
/// http://www.team.net/mailman/listinfo
/// Archives at http://www.team.net/archive/mg-mmm
/// Send list postings to mg-mmm@autox.team.net
|