Good information at
www.clarks-garage.com:
http://www.clarks-garage.com/pdf-manual/cool-07.pdf
The quick check to see if your car has the updated pump turbo pump if to look at the waterpump "nose" sticking out of the front. If it has a white "block off" plate (turbo uses-we do not), you have the updated pump.
If you car still has the OEM pump with out the silver belt guard, you should upgrade. Get the belt guard and new roller. .
Get a pump with a good guarantee---New or used.
GL
John_AZ