So I got the heads out of the car the other day. I also pulled the valve springs and valves from the head so I could replace the valve seals. As you can see by the following pictures some of the intake valves are quite dirty. The valves that are the most dirty are the valve that are in the secondary ports.
Valve Springs/Retainers/Valves/Keepers

Dirty Intake Valve

LH Head Parts

RH Head Parts

My question is, is it ok to clean the valves? What should I clean them with? I assume I shouldn't use any wire brush or anything that would scratch the shaft of the valve as that would probably affect how the valve seals against the valve seal. So some general cleaner and a tooth brush?
As you can see I have everything marked and in order of the way they came out of the heads so I can re-install them in the exact place they came out of.
I am looking for a suitable bottle/tube brush so I can start cleaning the ports in the head as well as in the upper and lower intakes.
Valve Springs/Retainers/Valves/Keepers

Dirty Intake Valve

LH Head Parts

RH Head Parts

My question is, is it ok to clean the valves? What should I clean them with? I assume I shouldn't use any wire brush or anything that would scratch the shaft of the valve as that would probably affect how the valve seals against the valve seal. So some general cleaner and a tooth brush?
As you can see I have everything marked and in order of the way they came out of the heads so I can re-install them in the exact place they came out of.
I am looking for a suitable bottle/tube brush so I can start cleaning the ports in the head as well as in the upper and lower intakes.