Acura CL Integra NSX RL RSX TL TSX 2001-2006

Thermostat

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Removal & Installation



2004-06 TL Models
  1. Make sure you have the anti-theft codes for the radio and navigation system, then write down the audio presets. Make sure the ignition switch is OFF.
  2.  
  3. Disconnect the negative cable from the battery first, then disconnect the positive cable.
  4.  
  5. Remove the battery.
  6.  
  7. Drain the engine coolant.
  8.  
  9. Remove the thermostat cover, then remove the thermostat.

    Click image to see an enlarged view

    Fig. Thermostat mounting-2004-06 TL models

  10.  

To install:

  1. Install the thermostat with a new rubber seal.
  2.  
  3. Install the battery.
  4.  
  5. Refill the radiator with engine coolant, then bleed air from the cooling system.
  6.  
  7. Clean up any spilled engine coolant.
  8.  
  9. Enter the anti-theft codes for the radio and the navigation system, then enter the audio presets.
  10.  
  11. Set the clock.
  12.  

2005-06 RL Models
  1. Make sure you have the anti-theft codes for the radio and navigation system, then write down the audio presets. Make sure the ignition switch is OFF.
  2.  
  3. Disconnect the negative cable from the battery first, then the positive cable, then remove the battery.
  4.  
  5. Drain the engine coolant.
  6.  
  7. Remove the ground cable and thermostat cover, then remove the thermostat.

    Click image to see an enlarged view

    Fig. Exploded view of the thermostat mounting-2005-06 RL models

  8.  

To install:

  1. Install the thermostat with a new rubber seal.
  2.  
  3. Install the battery. Clean the battery posts and cable terminals with sandpaper, then assemble them and apply grease to prevent corrosion.
  4.  
  5. Refill the radiator with engine coolant, then bleed air from the cooling system.
  6.  
  7. Clean up any spilled engine coolant.
  8.  
  9. Enter the anti-theft codes for the radio and the navigation system, then enter the audio presets.
    NOTE
    Reset the power window control unit using one of the two following procedures.

  10.  
  11. Resetting the power window control unit with an HDS:
    1. Connect the Honda Diagnostic System (HDS) to the vehicle's DLC.
    2.  
    3. Turn the ignition switch ON (II), then enter the vehicle's VIN and mileage at the prompts.
    4.  
    5. Select Body Electrical from the System Selection menu.
    6.  
    7. From the Body Electrical System Select menu, select Power Windows.
    8.  
    9. From the Mode menu, select Adjustments.
    10.  
    11. From the Adjustment menu, select Window P Reset.
    12.  
    13. Follow the prompts on the screen.
    14.  
    15. Confirm that the power window master switch is reset by using the driver's window AUTO UP and DOWN function.
    16.  

  12.  
  13. Resetting the power window control unit without an HDS:
    1. Turn the ignition switch ON (II).
    2.  
    3. Move the driver's window all the way down by using the driver's window DOWN switch.
    4.  
    5. Open the driver's door.
      NOTE
      Steps d.-g. must be done within 5 seconds of each other.

    6.  
    7. Turn the ignition switch OFF.
    8.  
    9. Push and hold the driver's window DOWN switch.
    10.  
    11. Turn the ignition switch ON (II).
    12.  
    13. Release the driver's window DOWN switch.
    14.  
    15. Repeat steps d.-g. three more times.
    16.  
    17. Wait 1 second.
    18.  
    19. Confirm that AUTO UP and AUTO DOWN do not work. If AUTO UP and DOWN work, go back to step a.
    20.  
    21. Move the driver's window all the way down by holding the driver's window DOWN switch to the AUTO DOWN position.
    22.  
    23. Pull up and hold the driver's window UP switch to the AUTO UP position until the window reaches the fully closed position, then continue to hold the switch for 1 second.
    24.  
    25. Confirm that the power window master switch is reset by using the driver's window AUTO UP and DOWN function.
    26.  
    27. If the window still does not work in AUTO, repeat the procedure several times, paying close attention to the 5 second time limit between steps.
      NOTE
      If battery is disconnected, the power tilt and telescopic steering wheel system needs to be reset when you reconnect the battery.

    28.  

  14.  
  15. Perform the steering column position memorization procedure. To reset the system when the auto tilt and telescopic feature is turned on:
    1. Push the ignition switch for at least 2 seconds and release it, or insert the built-in key into the ignition switch, and remove it.
    2.  
    3. The steering wheel automatically moves fully in and up to let you know the system is reset.
    4.  

  16.  
  17. To reset the system when the auto tilt and telescopic feature is turned off:
    1. Move the steering wheel to the highest position and hold that position by pushing and holding the adjustment button for at least 2 seconds.
    2.  
    3. Then, move the steering wheel to the most inward position, and hold that position by pushing and holding the adjustment button for at least 2 seconds.
    4.  

  18.  
  19. Set the clock.
  20.  

CL Models, 2001-04 RL Models & 2001-03 TL Models
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a suitable container.
  4.  
  5. Locate the thermostat housing by following the upper radiator hose to the engine.
  6.  
  7. Loosen the hose clamps then carefully detach the hose from the fitting.
    NOTE
    If the hose is stuck, carefully use a pick to break the seal between the radiator hose and the housing. If the hose is deteriorated, replace it with a new one.

  8.  
  9. Disconnect any sensors or switches that may interfere with the removal of the thermostat from the housing.

    Click image to see an enlarged view

    Fig. Exploded view of the thermostat mounting-CL models shown

  10.  
  11. Unfasten the retainers, then remove the thermostat housing.
    NOTE
    Some coolant may leak out of the housing as the seal is broken.

  12.  
  13. Remove the thermostat carefully noting how it-s installed.
  14.  
  15. Clean the mating surfaces of the thermostat housing.
    NOTE
    Many thermostat housing-s are made out of aluminum alloy. A plastic scraper is very effective and will not harm such metals.



    Click image to see an enlarged view

    Fig. Exploded view of the thermostat mounting-2001-03 TL models

  16.  

To install:

  1. Install the new thermostat and gasket.
    NOTE
    Install the thermostat with the jiggle pin facing up. This acts as an air bleed and must be at the top of the thermostat to operate properly.

  2.  
  3. Install the thermostat housing, then tighten the bolts securely.
  4.  
  5. Connect the radiator hose and tighten the hose clamps securely.
  6.  
  7. Install any remaining components, then refill the cooling system.
  8.  
  9. Start and run the engine until it reaches normal operating temperature while checking for leaks.
  10.  

Integra Models
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a suitable container.
  4.  
  5. Locate the thermostat housing by following the upper radiator hose to the engine.
  6.  
  7. Loosen the hose clamps then carefully detach the hose from the fitting.
    NOTE
    If the hose is stuck, carefully use a pick to break the seal between the radiator hose and the housing. If the hose is deteriorated, replace it with a new one.

  8.  
  9. Disconnect any sensors or switches that may interfere with the removal of the thermostat from the housing.

    Click image to see an enlarged view

    Fig. Remove the thermostat housing bolts



    Click image to see an enlarged view

    Fig. Pull the water outlet neck away from the housing



    Click image to see an enlarged view

    Fig. Note the installed position of the thermostat, then remove it

  10.  
  11. Unfasten the retainers, then remove the thermostat housing.
    NOTE
    Some coolant may leak out of the housing as the seal is broken.

  12.  
  13. Remove the thermostat carefully noting how it-s installed.
  14.  
  15. Clean the mating surfaces of the thermostat housing.
    NOTE
    Many thermostat housing-s are made out of aluminum alloy. A plastic scraper is very effective and will not harm such metals.

  16.  

To install:

Click image to see an enlarged view

Fig. A new gasket must be installed before installation



Click image to see an enlarged view

Fig. Install the thermostat with the air bleed valve at the top

  1. Install the new thermostat and gasket.
    NOTE
    Install the thermostat with the jiggle pin facing up. This acts as an air bleed and must be at the top of the thermostat to operate properly.

  2.  
  3. Install the thermostat housing, then tighten the bolts securely.
  4.  
  5. Connect the radiator hose and tighten the hose clamps securely.
  6.  
  7. Install any remaining components, then refill the cooling system.
  8.  
  9. Start and run the engine until it reaches normal operating temperature while checking for leaks.
  10.  

NSX Models
  1. Disconnect the negative battery cable.
  2.  
  3. Drain the cooling system into a suitable container.
  4.  
  5. Locate the thermostat housing by following the upper radiator hose to the engine.
  6.  
  7. Loosen the hose clamps then carefully detach the hose from the fitting.
    NOTE
    If the hose is stuck, carefully use a pick to break the seal between the radiator hose and the housing. If the hose is deteriorated, replace it with a new one.

  8.  
  9. Disconnect any sensors or switches that may interfere with the removal of the thermostat from the housing.
  10.  
  11. Unfasten the retainers, then remove the thermostat housing.
    NOTE
    Some coolant may leak out of the housing as the seal is broken.

  12.  
  13. Remove the thermostat carefully noting how it-s installed.
  14.  
  15. Clean the mating surfaces of the thermostat housing.
    NOTE
    Many thermostat housing-s are made out of aluminum alloy. A plastic scraper is very effective and will not harm such metals.

  16.  

To install:

  1. Install the new thermostat and gasket.
    NOTE
    Install the thermostat with the jiggle pin facing up. This acts as an air bleed and must be at the top of the thermostat to operate properly.

  2.  
  3. Install the thermostat housing, then tighten the bolts securely.
  4.  
  5. Connect the radiator hose and tighten the hose clamps securely.
  6.  
  7. Install any remaining components, then refill the cooling system.
  8.  
  9. Start and run the engine until it reaches normal operating temperature while checking for leaks.
  10.  

RSX Models
  1. Drain the engine coolant.
  2.  
  3. Remove the splash shield.
  4.  
  5. Remove the lower hose, then remove the thermostat.

    Click image to see an enlarged view

    Fig. Exploded view of the thermostat mounting-RSX models

  6.  

To install:

  1. Install the thermostat with a new O-ring, then install the lower hose.
  2.  
  3. Install the splash shield.
  4.  
  5. Refill the radiator with engine coolant, and bleed the air from cooling system with the heater valve open.
  6.  

TSX Models
  1. Drain the engine coolant.
  2.  
  3. Clean any dirt off the quick connector (A), thermostat cover, and lower radiator hose.
  4.  
  5. Pull out lock (B) by hand, then wiggle the quick connector loose, and remove it from the thermostat cover. Do not use any tools to remove the quick connector.

    Click image to see an enlarged view

    Fig. Clean the dirt off of the quick connector (A), then pull out lock (B) by hand, then wiggle the quick connector loose, and remove it from the thermostat cover

  6.  
  7. Remove the thermostat (A).
  8.  

To install:

  1. Install the thermostat with a new O-ring (B).

    Click image to see an enlarged view

    Fig. Always use a new O-ring (B) when installing the thermostat (A)

  2.  
  3. 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.
  4.  
  5. Make sure the set ring is in place inside the quick connector. If the set ring is off the connector, replace the quick connector.
  6.  
  7. Replace the O-ring (C) in the quick connector.
  8.  
  9. Check the lock (D). If the lock is damaged or deformed, replace it. When installing the new lock on the connector, press it straight down along the groove.
  10.  
  11. Clean the connecting surface of the thermostat cover (E), then apply clean engine coolant around the connecting surface.

    Click image to see an enlarged view

    Fig. Thermostat installation

  12.  
  13. Push down the lock, then push the quick connector onto the thermostat cover until you hear it click.
  14.  
  15. Refill the radiator with engine coolant, and bleed air from the cooling system with the heater valve open.
  16.  

 
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