...BTW your Bieber avatar is awesome.-Malone
I do know that I drive torque, while listening to my friends prattle on about horsepower.
The water circuit on my Subaru was mainly for after-run cooling to prevent bearing coking, the system is designed to circulate via thermal flow after the engine is shut off (and has a separate, high-mounted coolant tank), I'd suspect the VW system is similar... you don't need water running through it when in operation, the oil is plenty to keep it cool.