what is the little o ring for in the oil filter on a AFN

[Tom_B]

Morning all,

Just changing the oil on the 1.9 tdi the new oil filter came with a big o ring to seal the cap on and also a much smaller o ring - i cant see one on the sticky bit that goes through the filter where does it go?

thanks

 

[Tom_B]

Ah ha, I just looked more carefully and spotted it.