Re: to Dancap, Sorry I didn't get back sooner. Here are my thoughts after listening to the sound clip: There is a "secondary electric water pump" that is controlled by the ECM and is turned on after the engine is shut off so as to continue to circulate coolant through the turbocharger and thus prevent heat damage to the turbo. What it sounds like from this 'puter is that there is air in the cooling system that hasnt been bled out since the water pump replacement. (i.e., electric water pump is cavitating). If in fact that is the case it isnt good and should be remedied. I would recommend doing it as soon as possible if you can, or return it to the dealer and have them do it ASAP. The other possibility I can think of is the electric water pump itself is faulty. Again, not good and needs to be fixed. I believe what you should hear is a "steady electric motor humm" for about 2 minutes after shutoff as my car does. Being a "Mainah" my car is now in storage until spring and I cant record its sound now. Hope this all helps, Dancap, wishing you success in resolving the issue. Please let us all know the results. s.