Quote:
Originally Posted by big911fan
I've been thinking about replacing the water pump on my 2006 Boxster S as a preventative measure. I only have 27K miles on the car but I understand age can take it's toll on the composite pump vanes.
My question is this:
If I replace the water pump and thermostat/housing, how much coolant should I expect to lose?
The capacity of the system is 6 gals. but will I lose all of it, most of it, or just a small amount of it during the replacement procedure.
I want to be prepared with the correct amount of new coolant on hand.
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You are never going to get more than about 85% or so of the coolant out by just gravity draining the car; there are many places where the coolant gets held up and simply will not come out with out disassembling the car. That said, if this is your original coolant, you are more than due for fresh.
Buy three gallons of the Porsche coolant and three gallons for distilled water to premix it with. When you are done, you will have some premix left over for topping up down the road.