my power valve seals have just decided to give up, wondered if any one has any experiance in this, and could lend me some tips and trick and posibly where to get some replacement ones at a sensible price? any sugestions would be much appreciated.

Cheers Stockersss

Try Fowlers, best to go for genuine with things like this. Its only a couple of o rings. Take longer to clean all the carbon out than actually doing the spannering. Nothing complex.