[Steve Tinker]

Alex....
When you change out the pump, you really should replace the coolant fluid too - but be prepared to pay.
1) When you remove the old pump check that the impeller is in one piece and not broken - the last thing you need is impeller bits in the cooling system.

2) If you are even half interested in keeping your new to you car for a long time, use the search function and read about "coolant" & "gelling" for a few hours. If you are not going to use the genuine Porsche coolant, you MUST flush the whole system to remove all the old stuff or you could get gelling - which is not good.

You will now hear some differing opinions.....