First I would like to thank PorscheDoc for helping me diagnose my problem. It was in fact the coolant overflow tank that had minor cracks in the tank. I was able to do the job myself for $280 including coolant. I noticed that different porsche dealerships charge different prices for the same product after calling around. It does take several hours to do and it is in fact a bear getting the tank in and out. However if you want to save $500+ you can in fact do it your self. It took me longer because I got the tank installed and realized I forgot to insert the sensor in the bottom of the tank.

 

Errr....I may have done that the first time I did a tank as well