buzzing noise from rhr

[skidmark77]

Anyone come across a whirring/buzzing noise from the rhr 1/4 panel, near the fuel door, of their series 1 discos when you turn the engine off after a drive? the noise lasts a couple of minutes.......... is this normal?

Andrew

[rangieman]

Sounds like the tank venting , can you hear the noise outside the car near the fuel filler:cool:

[skidmark77]

Sounds like the tank venting , can you hear the noise outside the car near the fuel filler:cool:

yes, but it sounds like a mechanical buzz. i dont think its the pump as i can hear that prime separately when i turn the ignition on again. venting.......... interesting thought

[Scouse]

yes, but it sounds like a mechanical buzz. It vents through a spring loaded valve. It does buzz when venting.

[skidmark77]

ahhhh ok
next time it does it ill pull the fuel cap off and see if it stops

Andrew

[Utemad]

I know you said it isn't the fuel pump but out of curiosity do you have underfloor LPG tanks with the small petrol tank in the quarter panel?

[skidmark77]

I know you said it isn't the fuel pump but out of curiosity do you have underfloor LPG tanks with the small petrol tank in the quarter panel?
No the petrol tank is under the car still, and i have manifold tanks on the rear floor

[Utemad]

No the petrol tank is under the car still, and i have manifold tanks on the rear floor

Same as me.


It vents through a spring loaded valve. It does buzz when venting.

I don't here any buzzing from my quarter panel. Would/should the buzzing change from when the petrol tank is near empty and when it is full?

[Scouse]

I don't have a Disco but I have used 2 of these valves on my 120 litre tank in my Morris.

They only seem to vent when the tank is near empty as it's the fumes that expand rather than the fuel.
On a hot day they start buzzing in stereo :).

[Utemad]

They only seem to vent when the tank is near empty as it's the fumes that expand rather than the fuel.

That's what I was thinking :)

[skidmark77]

started buzzing when i got home from work. unscrewed the fuel cap and the noise stopped.
thanks for your advice