I actually just got off the phone with Jake Raby, he says the most likely thing here is that when the water pump failed a piece of the plastic impeller probably lodged in a capillary in the head, causing a blockage, causing a hot spot, causing a crack, most likely to the exhaust system, causing the burning of coolant.
Repair will be about $12K, which is the value of the car.
I now have to consider my options.
If there is one thing I can tell all Boxster owners: Change your water pump every 3 years no matter what!!!
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