I'm getting some rather loud and annoying noises from my baseboard heating system. The 1st sounds are pining noises from the fins on the registers. The 2nd sounds are a loud bang noise which occurs after the hot water valve closes. Does anyone have any ideas on how to get rid of these noises short of replacing the registers/valves? They are loud enough that they are waking me up at night. Thanks!

Change water valve to slow close type

Bleed radiators