Right, Been doing some more reading and had a look at all the valves. 2 of the valves are caked in oil, one of these valves was quite hard to get out compared to all the others which pretty much just dropped out when i tapped them with my finger. All the valves sat flush when I took the heads off and the one that was a pain to get out doesn't look bent.
I'm now wondering if I had a couple of worn valve guides or stem seals?
The two valves in question....
One of the valves compared to what the rest of the valves looked like....
