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Home >> Acura >> 2007 >> RDX >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System >> Radiator Replacement
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Radiator Replacement

  1. Drain the engine coolant (see COOLANT CHECK ).
  2. Remove the condenser fan shroud assembly and radiator fan shroud assembly (see FAN, FAN MOTOR, AND SHROUD REMOVAL AND INSTALLATION ).
  3. Remove the upper radiator hose (A).
    Fig 1: Identifying Upper Radiator Hose
    G05446959Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Clean any dirt off the quick connector (B), radiator, and lower radiator hose.
  5. Pull out the lock (C) by hand, then wiggle the quick connector loose, and remove it from the radiator. Do not use any tools to remove the quick connector.
  6. Remove the automatic transmission fluid (ATF) cooler hoses (D), then plug the hose and the line.
  7. Disconnect the engine coolant temperature (ECT) sensor 2 connector (E).
  8. Remove the intake air duct cover (A) and the four clips (B), then remove the upper radiator brackets (C).
    Fig 2: Identifying Intake Air Duct Cover, Clips And Upper Radiator Brackets
    G05446960Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Pull up the radiator, then remove the radiator cap (A), ECT sensor 2 (B), and drain plug (C).
    Fig 3: Radiator ECT Sensor With Torque Specifications
    G05446961Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Reassemble the radiator with new O-rings (D).
  11. Install the radiator. Make sure the lower cushions (E) are set securely.
  12. Install the upper radiator brackets (A), then install the intake air duct cover (B) and the four clips (C).
    Fig 4: Intake Air Duct Cover And Upper Radiator Brackets With Torque Specifications
    G05446962Courtesy of AMERICAN HONDA MOTOR CO., INC.
  13. Check the quick connector (A) and set ring (B) for cracks or damage. If the connector and/or set ring are cracked or damaged, replace the connector.
    Fig 5: Identifying Quick Connector, Set Ring, O-Ring And Lock
    G05446963Courtesy of AMERICAN HONDA MOTOR CO., INC.
  14. Make sure the set ring is in place inside the quick connector. If the set ring is displaced or not properly seated in the connector, replace the quick connector.
  15. Replace the O-ring (C) in the quick connector.
  16. Check the lock (D). If the lock is damaged or deformed, replace it. When installing the new lock to the connector, slide it straight down along the groove.
  17. Install a new lower radiator hose on the quick connector, and install the clamp.
  18. Clean the connecting surface of the radiator (E), then apply clean engine coolant around the connecting surface.
  19. Push down the lock (A), then push the quick connector (B) onto the radiator until you hear it click.
    Fig 6: Identifying Lower Radiator Electrical And Hose Connections
    G05446964Courtesy of AMERICAN HONDA MOTOR CO., INC.
  20. Install the upper radiator hose (C).
  21. Install the ATF cooler hoses (D), and connect the ECT sensor 2 connector (E).
  22. Install the condenser fan shroud assembly and radiator fan shroud assembly (see FAN, FAN MOTOR, AND SHROUD REMOVAL AND INSTALLATION ).
  23. Refill the radiator with engine coolant, and bleed the air from the cooling system with the heater valve open (see step  6 ).
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