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Coolant Replacement

WARNING: This page is about a different car, the 2013 Acura MDX, 2012 Acura MDX, 2011 Acura MDX, and 2010 Acura MDX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Wait until the engine is cool, then carefully remove the radiator cap.
  2. Remove the splash shield (see SPLASH SHIELD REPLACEMENT ).
  3. Loosen the drain plug (A) and drain the coolant.
    Fig 1: Loosening Drain Plug
    G08052387Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Install a rubber hose (A) on the drain bolt (B) located at the rear of the engine block, then loosen the drain bolt.
    Fig 2: Rubber Hose And Drain Bolt With Torque Specifications
    G08052388Courtesy 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. Install the splash shield (see SPLASH SHIELD REPLACEMENT ).
  8. Remove, drain, and reinstall the coolant reservoir.
  9. Fill the coolant reservoir to the MAX mark (A) with Acura Long Life Antifreeze/Coolant Type 2.
    Fig 3: Identifying Coolant Reservoir MAX Mark
    G08052389Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. 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 coolant reservoir capacity of 0.71 L (0.188 US gal)): 

    At Coolant Change: 7.3 L (1.93 US gal) 

    After Engine Overhaul: 9.2 L (2.43 US gal) 

    Fig 4: Filling Engine Coolant
    G08052390Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Start the engine. Hold the engine speed at 1, 500 rpm until it warms up (the radiator fan comes on at least twice). Make sure the thermostat is open.
  12. Turn off the engine. Check the level in the radiator, and add the recommended coolant, if needed.
  13. Set the climate control or heater control panel to maximum cool. Start the engine. Hold the engine speed at 1, 500 rpm for 5 minutes, then turn off the engine.
  14. Check the level in the radiator, and add the recommended coolant, if needed.
  15. Set the climate control or heater control panel to maximum heat. Start the engine. Hold the engine speed at 1, 500 rpm for 5 minutes, then turn off the engine.
  16. Check the level in the radiator, and add the recommended coolant, if needed.
  17. Set the climate control or heater control panel to maximum cool. Start the engine. Hold the engine speed at 1, 500 rpm for 3 minutes, then turn off the engine.
  18. Check the level in the radiator, and add the recommended coolant, if needed.
  19. Set the climate control or heater control panel to maximum heat. Start the engine. Hold the engine speed at 1, 500 rpm for 3 minutes, then turn off the engine.
  20. Check the level in the radiator, and add the recommended coolant, if needed.
  21. Repeat steps  17 through  20 until the coolant level does not change in the radiator, then install the radiator cap loosely.
  22. Set the climate control or heater control panel to maximum cool. Start the engine. Hold the engine speed at 2, 500 rpm for 1 minute.
  23. Set the climate control or heater control panel to maximum heat, and select high speed heat mode on the rear control panel. Measure the temperature of the air from the rear floor vent for 3 minutes. Make sure the temperature is above the standard line of the graph as shown. If the temperature is below the standard line, repeat steps  17 through  20 several more times. Then loosely install the radiator cap and recheck.
    Fig 5: Air Flow And Interior Temperature Graph
    G08052391Courtesy of AMERICAN HONDA MOTOR CO., INC.
  24. With the engine idling, make sure you do not hear the sound of water flowing near the rear heater unit. If you hear water flowing, repeat steps  17 through  20 several more times.
  25. Install the radiator cap securely.
  26. Fill the coolant reservoir with the recommended coolant up to the MAX mark on the coolant reservoir, then add an extra 0.4 L (0.11 US gal) coolant.
  27. Clean up any spilled engine coolant.
  28. If the Maintenance Minder required replacing the engine coolant, reset the Maintenance Minder (see MAINTENANCE MINDER™ ), and this procedure is complete. If the Maintenance Minder did not require engine coolant replacement, go to step  30.
  29. Turn the ignition switch to LOCK (0).
  30. Connect the HDS to the DLC (see step 2 under GENERAL TROUBLESHOOTING INFORMATION ).
  31. Turn the ignition switch to ON (II).
  32. Make sure the HDS communicates with the vehicle and the PCM. If it does not communicate, troubleshoot the DLC circuit (see DLC CIRCUIT TROUBLESHOOTING ).
  33. Select GAUGES in the BODY ELECTRICAL with the HDS.
  34. Select ADJUSTMENT in the GAUGES with the HDS.
  35. Select MAINTENANCE MINDER in the ADJUSTMENT with the HDS.
  36. Select RESET in the MAINTENANCE MINDER with the HDS.
  37. Select MAINTENANCE SUB ITEM 5 RESET with the HDS.
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