I have this 2004 turbo-s that I've been having a few cooling issues. I did install a new water pump with the metal impeller in it about the months ago. The old water pump was plastic and it failed. It's now trying to overheat if you let it sit there and idle but if you pickup the idle to about 1800-2000 rpm it cools back to normal. I'm thinking I might have broken a fin or two in this new water pump. I am wondering what brand of water pump you high horse power guys are using without tearing them up romping on it?? Gonna pull the thermostat tomorrow to see if I see any damage to the impeller. Thanks in advance.