After reading about the issues with valves on our 335i's (and I suspect other cars) and realising that my car is at 50k which is apparently too much
judging by the state fo some of the pictures I have decided to get them cleaned.
I have approached a garage in south Essex (J30 M25) about the cost and time of doing this the manual solvent way (hope about 4-5 hrs).
There might be some potential for a group buy if any of you guys are interested. Apparently it makes a big dirrerence to higher mileage cars.