Changing o rings on the s400 Classic filler valve body

[Mikeg99]

Hi
I have a S400 classic with the old style filler valve body which is lacking air through the small hole, does anyone know how to change the two O rings which are seated behind the valve screw inside the filler valve body.

[bgaltd]

Hi
I have a S400 classic with the old style filler valve body which is lacking air through the small hole, does anyone know how to change the two O rings which are seated behind the valve screw inside the filler valve body.

i'm sure it can be done , i just cant for the life of me remember the part number for the o ring . a call to AA will clarify though .