Topic

I will strip it down to get a look at the relief valve inside its just springs so I would imagine so long as nothing is broken and its all clean from rubbish it should work. I will need to have a think on how to test the cap once its rebuilt. Hopefully have a brain wave when I strip it down!

I found this on the web earlier http://www.mgfcar.de/fuelcap/ shows all the parts.

Also note that there is a correct and incorrect way to fit the cap. There is a key top right(2 O'clock)
Look at the cap there is a slot to allow the key to fit.

Yeah that's right if it is the wrong orientation I think the cap will stick it from the body of the car.