My 2004 Boxster 2.7 eng temp rises to about 90c in traffic. Normally runs at 82c. Get home to find coolant leaking from under the car. There is also coolant condensation around the filler cap and under the removable plastic plate. As you probably know in Australia we run in degrees centigrade . Can you explain what is causing this please ? The coolant cap is new and no apparent rumbling noises from the water pump.
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Porsche Boxster Water Pump and Thermostat Replacement - 986 / 987 (1997-08) - Pelican Parts Technical Article