radiator fans Turn on Temp
11-01-06, 09:05 AM
#1
radiator fans Turn on Temp
Ive looked around for about a half and hour and really couldnt come up with a good answer on this. Im sure its a simple answer and right under my nose, but what Tempature do the radiator fans turn on at? my pfc shows 85+ C on the read out and they still arent turning on. The only time they seem to work is if i turn on my AC and run the fans that way. otherwise the temp rises.
65C (150F): too cold. According to service manual, EGR valve is non-operational below 150F, "to improve drivability when cold."
82C (180F): getting warm. Thermostat begins to open, circulating coolant through the radiator. Some coolant is still bypassing the radiator.
95C (203F): fully warm. Thermostat is fully open, not bypassing the radiator at all.
100C (212F): boiling point of pure water at atmospheric pressure.
108C (226F): getting hot. Stock 93-95 coolant thermoswitch activates, changing fan speeds from low>> medium (if A/C is already on) (switching to an FC thermoswitch will change this temp to 203F)
110C (230F): fully hot. Stock ECU will activate fans to cool the car down. Fan speed will be medium, or high (if A/C is already on).
115C (240F): getting dangerous. OEM temp gauge begins to rise.
117C (243F): dangerous. boiling point of pure water with 13psi pressure cap.
121C (250F): too hot. OEM temp gauge will point to white line. Boiling point of pure water with 16psi pressure cap.
124C (256F): way too hot. Boiling point of pure water with 19psi pressure cap. Boiling point of 50/50 coolant mix with 13psi pressure cap.
127C (260F): way too hot. OEM temp gauge will point to red line.
I see it switches from low to Medium but where does it actually turn onto low at?
65C (150F): too cold. According to service manual, EGR valve is non-operational below 150F, "to improve drivability when cold."
82C (180F): getting warm. Thermostat begins to open, circulating coolant through the radiator. Some coolant is still bypassing the radiator.
95C (203F): fully warm. Thermostat is fully open, not bypassing the radiator at all.
100C (212F): boiling point of pure water at atmospheric pressure.
108C (226F): getting hot. Stock 93-95 coolant thermoswitch activates, changing fan speeds from low>> medium (if A/C is already on) (switching to an FC thermoswitch will change this temp to 203F)
110C (230F): fully hot. Stock ECU will activate fans to cool the car down. Fan speed will be medium, or high (if A/C is already on).
115C (240F): getting dangerous. OEM temp gauge begins to rise.
117C (243F): dangerous. boiling point of pure water with 13psi pressure cap.
121C (250F): too hot. OEM temp gauge will point to white line. Boiling point of pure water with 16psi pressure cap.
124C (256F): way too hot. Boiling point of pure water with 19psi pressure cap. Boiling point of 50/50 coolant mix with 13psi pressure cap.
127C (260F): way too hot. OEM temp gauge will point to red line.
I see it switches from low to Medium but where does it actually turn onto low at?
Last edited by twisted7; 11-01-06 at 09:11 AM.
11-01-06, 10:07 AM
#2
Rotary Enthusiast
actually should include:
~205F: parking lites on or cabin fan at 3 or more, ecu turns fans on at low (med if ac on)
221F: ecu turns fan on at low (med if AC on)
226F: temp switch turns fan on med (fast if ac on). FC switch drops this event to 207F,
and mostly eliminates low speed fan use.
235F: based on special temp switch for atx, takes steps to reduce atx heat generation.
note with pfc and datalogit, fan on points can be altered
sorry for late reply scott
~205F: parking lites on or cabin fan at 3 or more, ecu turns fans on at low (med if ac on)
221F: ecu turns fan on at low (med if AC on)
226F: temp switch turns fan on med (fast if ac on). FC switch drops this event to 207F,
and mostly eliminates low speed fan use.
235F: based on special temp switch for atx, takes steps to reduce atx heat generation.
note with pfc and datalogit, fan on points can be altered
sorry for late reply scott
