Thank you
Rob175 and
NewArt for this very good info. I'm back from travels and will open up the carpets on the wekend to come. I've had the car only 2 months and can see now that the water in the reservoir is at the lower mark now when the car warm... can't remember how it was at the time of purchase
Quote:
Originally Posted by NewArt
Check under the carpet/liner in the trunk near the tank for wetness.
Replacing the tank with an original Porsche part is recommended. Aftermarket tanks have often proved to be unreliable; you don't want to do the job twice!
DIY tips and videos abound. You might want to tackle this job, it's not as daunting as many make you believe! 
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Quote:
Originally Posted by Rob175
Please DON'T RELY on seeing or feeling a "wet carpet" in the truck in order to determine IF the coolant tank is leaking! In my case the carpet was bone dry and the tank was still leaking (actually weeping from it's bottom when up to temp and pressurized).
The trunk in my 1998 has a masonite type of raised flooring that sits 1 inch above and between the metal trunk floor and the carpet....that allowed the coolant to collect below the masonite raised floor and just slosh around until it eventually found a way to drip a few drops on my garage floor.
I suggest you removed ALL the fabric lining in the rear trunk (bottom & sides)....(easy to do but time consuming). Then lift up the raised floor boards and drive the car for a day or two and just keep opening the truck to look for coolant collecting. I took rolled up paper towel and placed it all around the tanks sides and bottom, drove the car for a bit, and saw the paper towel began getting wet.
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