Engine Cooling problem
2003 Chevy Malibu 6 cyl Front Wheel Drive Automatic 130000 miles
I'm the owner of this vehicle and am relaying the problem as my mechanic has described it to me:
The hi-speed radiator fan is not coming on when the temperature goes over 96 degrees centigrade. (The low-speed fan is operating normally.)
The engine coolant overflows as a result.
We have installed a new engine temperature sensor, a new thermostat and even reprogrammed the Engine Control Module.
What we don't understand is that when we unthread the engine temperature sensor from the housing, leaving the electric connector hooked into it and with the ignition key on, when we place the sensor in a bowl with water and heat it to 96 degrees centigrade the system responds and the fans come on like they should when the sensor is threaded into the thermostat housing.
A thermoswitch has been installed temporarily so that the vehicle can be driven.
Wednesday, December 2nd, 2009 AT 2:15 PM