981 Cayman S Water Temperature
Discussion
The 981 cooling system is set to open the thermostat at 105 degrees when in normal mode, if the Sport button is pressed then the 'stat is electronically opened to regulate the temp around 85 degrees (emissions and efficiency are better at higher temperature - Sport setting allows for better regulation when the engine is worked harder). The dash has a 'tolerance window' that displays a constant, steady temp at 90 degrees. The only time I have seen a 981 coolant temp over 100 degrees indicated on the dash it had either an airlock in the system or a thermal management solenoid valve had failed - was the AC still supplying heated air?? (If not; bolsters the two scenarios above)
Edited by Pope on Friday 22 November 20:03
Pope said:
Thermal management is achieved with the solenoid valves and electronic thermostat fitted to the latest electronic platform vehicles 9x1 (sportscars) 970 (Panamera) and 92A (Cayenne) not fitted to any gen2 9x7's
shame they didn't fit the same arrangement on the m96/7 engine might have saved a few from bore scoring!just out of interest mr pope what sort of temperature does the thermostat open at on the 9x7 gen2 cars?
Pope said:
The only time I have seen a 981 coolant temp over 100 degrees indicated on the dash it had either an airlock in the system or a thermal management solenoid valve had failed - was the AC still supplying heated air?? (If not; bolsters the two scenarios above)
Still receiving hot air, although I have never been impressed by the heat of the air it blows, might be somehitng there?Edited by Pope on Friday 22 November 20:03
Anyway - did the journey in reverse (not reverse gear ;-) ) the follwoing day with Sport Plus engaged - never got above 97degC.
Moog72 said:
Interestingly, my Boxster is the exact opposite - coolant is rock steady at 90c and oil, when not in sport mode, sits around the 110c mark. Put it in sport and the oil comes down to around 90c
981 Boxster S - exactly the same experience as Moog72. But it takes an age for the oil temp to get out of the "red" cold zone when starting from cold (about 75 deg IIRC), and probably 20min driving to equal the water temp. Has made me wonder where the oil temp sensor is.
Exactly the same in my 981 Cayman. Water gets to temp quite quickly and then never varies from 90 deg. Oil takes an absolute age to warm up, much longer than my previous 997 C2S, and then can vary between 90 deg to about 110 deg. I thought they now had fancy thermal management which I assumed would mean quicker warm up. I don't go to high revs until the oil is warm, which means quite a long wait!
A water temp' of 110'C doesn't seem right to me.
I've never owned a car that shows water temp' over 95'C. My 997 Turbo water sits rock solid at 88'C and the oil at 95ish. I've only ever seen my oil temp' reach 110'C on fast autobahn trips, never over, probably because the Turbo has an oil cooler!
And my oil and water get up to temperature really quickly.
I've never owned a car that shows water temp' over 95'C. My 997 Turbo water sits rock solid at 88'C and the oil at 95ish. I've only ever seen my oil temp' reach 110'C on fast autobahn trips, never over, probably because the Turbo has an oil cooler!
And my oil and water get up to temperature really quickly.
Greenslade said:
Water should run at 80C. for every 1 degree above you lose 1% of potential horsepower. Oil should run at 100C.
On that basis, why not 70? Or 65? It's a compromise between power and emissions. Plenty of cars are now designed to run at well above 80C. I'd be surprised if Modern Porsches don't, whatever the gauge says.
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