Water Pump
 

When changing the water pump do I have to drain the coolant from the radiator?

You don't have to drain it all....but when you remove the pump a bunch will pour out of there from the engine etc.... It will pour out regardless of the radiator being emptied, so when I did it I just left the radiator alone and then poured in some more into the expansion tank when I was done....all worked well.

change WATER PUMP
 

1094 300d Turbo 136k
Drain Radiator And Change Upper And L0wer Hose Same Time Install
Lower New Lower Hose And Upper, Fill Radiator Run Engine And Stop
Pull Top Hose Off And Fill Hose What You Take Out Is The Same You
Put Back In As A Transmission Fluid Change