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Home >> Acura >> 2006 >> RL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Cooling System >> Coolant Replacement

Coolant Replacement

  1. Start the engine. Set the heater temperature control dial to maximum heat, then turn off the ignition switch. Make sure the engine and radiator are cool to the touch.
  2. Remove the radiator cap.
  3. Loosen the drain plug (A) and drain the coolant.
    Fig 1: Loosening Radiator Coolant Drain Plug
    G05494217Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Install a rubber hose (A) on the drain bolt (B) located at the rear of the cylinder block, then loosen the drain bolt.
    Fig 2: Draining Coolant At Rear Of Cylinder Block With Torque Specifications
    G05494218Courtesy of AMERICAN HONDA MOTOR CO., INC.
  5. When the coolant stops draining, tighten the drain bolt. Remove the rubber hose.
  6. Tighten the radiator drain plug securely.
  7. Remove the coolant reservoir and drain the coolant, then reinstall the coolant reservoir.
  8. Fill the coolant reservoir to the MAX mark (A) with Acura Long Life Antifreeze/Coolant Type 2 (P/N OL999-9011A).
    Fig 3: Identifying Coolant Reservoir Coolant Level Marks
    G05494216Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Pour Acura Long Life Antifreeze/Coolant Type 2 into the radiator up to the base of the filler neck.
    NOTE:
    • Always use Acura Long Life Antifreeze/Coolant Type 2 (P/N OL999-9011A). Using a non-Acura coolant can result in corrosion, causing the cooling system to malfunction or fail.
    • Acura Long Life Antifreeze/Coolant Type 2 is a mixture of 50% antifreeze and 50% water. Do not add water.

    Engine Coolant Capacities (Including the reserve tank capacity of 0.58 L (0.153 US gal)): 

    After Coolant Change: 6.0 L (1.59 US gal) 

    After Engine Overhaul: 8.6 L (2.27 US gal) 

    Fig 4: Pouring Acura Long Life Antifreeze/Coolant Type 2 Into Radiator
    G05494220Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Install the radiator cap loosely.
  11. Start the engine and let it run until it warms up (the radiator fan comes on at least twice).
  12. Turn off the engine. Check the level in the radiator and add Acura Long Life Antifreeze/Coolant Type 2, if needed.
    NOTE: Removing the radiator cap while the engine is hot can cause the coolant to spray out. Always let the engine and radiator cool before removing the cap.
  13. Put the radiator cap on tightly, then run the engine again and check for leaks.
  14. Clean up any spilled engine coolant.
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