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Home >> Acura >> 2012 >> RL >> Repair and Diagnosis >> Engine Mechanical >> Cooling System (Mechanical) >> Engine Cooling System >> Coolant Replacement

Coolant Replacement

  1. Start the engine. Set the heater temperature control to maximum heat, then turn the ignition switch to LOCK (0). Make sure the engine and the radiator are cool to the touch.
  2. Remove the radiator cap.
  3. Loosen the drain plug (A) and drain the coolant.
    Fig 1: Identifying Drain Plug
    G07353745Courtesy 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: Installing Rubber Hose On Drain Bolt With Torque Specifications
    G07353746Courtesy 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, drain, and reinstall the coolant reservoir.
  8. Fill the coolant reservoir to the MAX mark (A) with Acura Long Life Antifreeze/Coolant Type 2.
    Fig 3: Filling Coolant Reservoir To Max Mark With Coolant
    G07353747Courtesy 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. 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 Into Radiator
    G07353748Courtesy 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 the 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.
  15. If the Maintenance Minder required engine coolant replacement, reset the Maintenance Minder (see MAINTENANCE MINDER™ ), and this procedure is complete. If the Maintenance Minder did not require
  16. Turn the ignition switch to LOCK (0).
  17. Connect the HDS to the DLC (see step 2 on HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM) ).
  18. Make sure the HDS communicates with the vehicle and the PCM. If it does not communicate, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
  19. Turn the ignition switch to ON (II).
  20. Select GAUGES in the BODY ELECTRICAL with the HDS.
  21. Select ADJUSTMENT in the GAUGES with the HDS.
  22. Select MAINTENANCE MINDER in the ADJUSTMENT with the HDS.
  23. Select RESET in the MAINTENANCE MINDER with the HDS.
  24. Select MAINTENANCE SUB ITEM 5 RESET with the HDS.
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