Flushing

You may use various methods and equipment in order to flush the system. If using special equipment such as a back flusher, follow the manufacturer's instructions. However, remove the thermostat before flushing the system This does not apply to the 4.8L, 5.3L, and 6.0L engines.

RADIATOR CLEANING

CAUTION: NEVER spray water on a hot radiator. The resulting steam could cause personal injury.

NOTICE: The radiator fins are necessary for good heat transfer. Do not brush the fins. This may cause damage to the fins, reducing heat transfer.

^ Inspect the hoses for flexibility and no signs of bulging.
^ Inspect the hoses for cracks, cuts, kinks and areas of possible leaks.
^ Inspect the brackets, the supports, the ties and the clamps.
^ Replace and adjust as needed.

IMPORTANT: Do not brush the radiator fins or spray the radiator with high pressure water. The radiator fins are necessary for good heat transfer. Brushing damages the fins and reduces heat transfer. Clean the front face of the radiator annually.

^ Clean the front face of the condenser.
^ Remove bugs, leaves, etc. by blowing compressed air through the radiator.
Blow the air from the rear toward the front. If compressed air is not available a water hose can be used to force water through the radiator. Use water only with the engine not running and cool.