Replacing Radiator, should I replace it THEN do an engine radiator flush
- ENSURE engine is off and cool.
- DRAIN radiator then close drain ****.
- POUR entire contents of bottle into radiator and fill with water. Use two bottles for systems larger than 12 quarts.
- RUN engine with heater on high for 10 minutes after reaching normal operating temperature.
- COOL engine. Remove radiator cap and drain radiator. Close drain **** and refill with water.
- REPLACE radiator cap and run engine again with heater on high for 10 minutes after reaching normal operating temperature.
- COOL engine before installing new antifreeze/coolant.
