Noticed oil from one of the main bolts on top of the engine, I believe the it's the o-ring that's gone, is this an easy fix also while I am there I might as well do the top end gasket as that is seeping too, is this a difficult task or just a simple replace and rebuild?
Also are there any tutorials on shims and valve clearances? while I've got the top end off I might as well do them as it needs doing!
Hopefully this will help its in the tutorial section of this forum
https://www.youtube.com/watch?v=j4vRm9xADa8
Fantastic, thank you!