Yeah, I have no idea. The guy i bought it from said he did a lot of the maintenance himself, and the service manual didn't come with it, so I'm wondering if he ever really used one when working on it. 3 gallons of coolant is a lot, and just proves how bulletproof these engines are! Ran on almost no coolant and didn't blow any gaskets.

Did you find the bleeder valve?

http://img5.imageshack.us/img5/8492/89529100.jpg

Mine got pretty hot, red light came on.

You have a major problem - 3 gallons of coolant is a serious leak....

1) Check your oil level to see if there is coolant / oil intermix.
2) Did you "bleed" the system after refilling with coolant?
3) What did you fill the coolant overflow bottle with - some off the shelf coolant fluids react to the Porsche coolant causing gelling"?.
4) If in doubt, get the system pressure checked by a reputable Porsche specialist.

Is your oil 3 gallons over full by any chance? It had to go somewhere, I would take it (maybe even tow it) to be pressure tested and checked for intermix.

I wouldn't write this off as a fluke on account of the previous owner. I would much more suspect someone passing off a problem car onto an unsuspecting buyer.

Skoot

Well, I'm doing an oil change today so we'll see if an idiot previously worked on the car(likely), the car is burning a bit(common), if it it's in the oil (unlikely at this point)