[flymo]

Just replaced the head cover gaskets with brand new rubber ones but they are leaking, not much but I would not expect them to leak at all.

Its on a K3 not that it makes much difference.

Anybody come across this before, how did you resolve?

I didnt replace the thick rubber washers that sit under the three bolts on each head cover, is that the problem, maybe not applying as much pressure to the cover if they are older.