Cooling System Specifications: Maintenance: Flushing
CAUTION:
Cooling system normally operates at 12-15 psi. Exceeding this pressure may damage radiator or hoses.
- Reverse flushing is an effective means of removing cooling system rust and scale. Ensure heater control valve is closed (heater off). This will prevent coolant flow with scale and other deposits from entering heater core.
- To flush radiator, connect flushing gun to water outlet of radiator and disconnect water inlet hose. To prevent flooding engine, use a hose connected to radiator inlet. Use air in short bursts to prevent damage to radiator. Continue flushing until water runs clear.
- To flush engine, remove thermostat and replace housing. Connect flushing gun to water outlet of engine. Flush using short air bursts until water runs clean.
- Flush heater core as described for radiator. Ensure heater control valve is set to maximum heat position before flushing heater.