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Post by recce75 on Feb 26, 2007 9:47:06 GMT 8
Hi All,
I drive with my aircon turned on 99.5% of the time. However, this morning I decided to drive to work without my aircon and I discovered an indirect effect of not turning on the aircon.
The water temp(coolant) on my Sportage when warmed up is between 81 to 84 degrees celcius. However, this morning without my aircon on and stopping at traffic lights, I was SHOCKED to see the water temp climb to 94 degrees celcius!
Thats a whole 10 degrees above the norm I've experience on my vehicle. I immediately turned on my aircon but I wasn't able to verify the water temp drop after that as the traffic lights turned green and it dropped backed to the normal range after that. For those, who wonder why turning on aircon will result in water temp drop, our aircon fan will be turned on 100% of the time when aircon is on, this would have resulted in constant airflow through the radiator.
I'll try this another morning to verify what I experienced this morning, will post again if I can verify this.
Bernard
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Post by recce75 on Feb 26, 2007 13:02:10 GMT 8
Verified that with aircon turned on, water temp will stabilise between 82 to 84 degree celcius.
Test situation: 1) Drove at constant speed on expressway home 2) After exit, stop by road. Water temp slowly climb to above 94 degree celcius 3) Upon reaching 92 degree celcius, aircon is turned on 4) Slowly but surely, water temp drop. 5) Within about 1 minute, water temp drop back to 82 to 84 degree celcius
Do note that water temp when crusing on expressway without aircon is between 81 to 84 degree celcius.
Bernard
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Post by Kit71 on Feb 26, 2007 14:09:44 GMT 8
After this test... Will you see anything wrong if it's 94 degree? How you take the measurement? Bcos, I use to smoke while driving.
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Post by recce75 on Feb 26, 2007 21:10:25 GMT 8
After this test... Will you see anything wrong if it's 94 degree? How you take the measurement? Bcos, I use to smoke while driving. I've got scan guage connected to the OBD2 connector in the cabin. The readings come from the OEM sensors which the ECU depends upon. With higher water temp, the engine will eventually run hotter, which might(only) cause pinging/knock/pre-detonation if using lower octane petrol. Also the other fluids like engine oil might run hotter as well(my guess), which might/will cause the engine oil to breakdown faster/earlier, which might/will result in lowered protection after usage(say 7 to 10k). But all above are base on assumptions, I don't have an egine oil temp sensor installed, so can't verify. Bernard
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