Cooling system overview. The alert will notice: a) no central spout on the crosspipe (a V12 saloon crosspipe is fitted which is the only new type now avaulable), b) the radiator purge tubes have gone, c) the radiator bleed is from the LHS - see red hose going to firewall header tank. The radiator filling bleed screw is in the banjo threads. The header tank is connected to the main system by a T into the heater return, the overflow is the red tank on the wing where the factory tank was.