Flushing

Radiator Installed
To remove rust, sludge and other foreign material from the cooling system, use warm water only. Remove the water thermostat prior to pressure flushing. This cleaning restores cooling efficiency and helps prevent overheating. A pulsating or reversed direction of flushing water will loosen sediment more quickly than a steady flow in the normal coolant flow direction. In severe cases where warm water will not properly clean the cooling system for efficient operation, use the pressure flushing method, using Rotunda Pro Flush and Fill, Coolant Flush and Fill 023-00154 or equivalent. Dispose of old coolant and flushing water contaminated with antifreeze in accordance with local, state and federal laws.

Radiator Removed

1. CAUTION: Radiator internal pressure must not exceed 138 kPa (20 psi). Damage may result.

Backflush radiator with radiator upside down. Position a high-pressure water hose in lower hose location and backflush.
2. Remove water thermostat housing and water thermostat.
3. Backflush engine. Position high-pressure hose into engine through engine return and backflush engine.