Engine Cooling System: Testing

In cases of engine overheating or insufficient air conditioning proceed with following tests:

1. Start with a cool engine to ensure complete fan clutch disengagement.
2. Cover radiator grille sufficiently to induce high engine temperature.
3. Start engine and operate at 2000 RPM. Turn on air conditioning if equipped.
4. A fan roar will be noticed when fan clutch engages.
   NOTE: It will take approximately 5 to 10 minutes for temperature to become high enough to allow engagement of the fan clutch. While operating engine under these conditions, observe temperature light to prevent overheating. If hot light comes on, remove cover from radiator grille.
5. When clutch engages, remove radiator grille cover and turn A/C off to assist in engine cooling.
6. After several minutes fan clutch should disengage. This can be determined by a reduction in fan speed and roar. If fan fails to function as described, it should be replaced.
   NOTE: To avoid premature cooling system wear, always use the manufacturer's recommended coolant products and coolant mixture ratios.