Acura RL. Manual - part 580

Fig. 125: Identifying Blower Unit Components
Courtesy of AMERICAN HONDA MOTOR CO., INC.

EVAPORATOR CORE REPLACEMENT

1. Recover the refrigerant with a recovery/recycling/ charging station (see REFRIGERANT

RECOVERY ).

2. Remove the engine cover (see IGNITION COIL REMOVAL/INSTALLATION ).

3. Remove the bolt, then disconnect the A/C lines (A) from the evaporator core.

Fig. 126: Identifying A/C Lines Connection At Evaporator Core With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Remove the blower unit (see BLOWER UNIT REMOVAL/INSTALLATION ).

5. Remove the self-tapping screws and the expansion valve cover (A), then remove the bolts and the

expansion valve (B) without bending the lines.

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:43 PM

Fig. 127: Identifying Expansion Valve Cover And Expansion Valve
Courtesy of AMERICAN HONDA MOTOR CO., INC.

6. Disconnect the connectors (A) from the power transistor and control motor relay, then remove the

joint duct (B).

Fig. 128: Identifying Connectors, Power Transistor, Control Motor Relay And Joint Duct
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Carefully pull out the evaporator core (A) and the plate (B).

Fig. 129: Identifying Evaporator Core And Plate

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:43 PM

Courtesy of AMERICAN HONDA MOTOR CO., INC.

8. Install the core in the reverse order of removal, and note these items:



If you're installing a new evaporator core, add refrigerant oil (DENSO ND-OIL 8) (see A/C
REFRIGERANT OIL REPLACEMENT ).



Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before
installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.



Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture
absorption.



Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil
contacts the paint, wash it off immediately.



Make sure that there is no air leakage.



Charge the system (see SYSTEM CHARGING ).

EXPANSION VALVE REPLACEMENT

1. Recover the refrigerant with a recovery/recycling/ charging station (see REFRIGERANT

RECOVERY ).

2. Remove the engine cover (see IGNITION COIL REMOVAL/INSTALLATION ).

3. Remove the bolt, then disconnect the A/C lines (A) from the evaporator core.

Fig. 130: Identifying A/C Lines Connection At Evaporator Core With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.

4. Remove the blower unit (see BLOWER UNIT REMOVAL/INSTALLATION ).

5. Remove the self-tapping screws and the expansion valve cover (A), then remove the bolts and the

pipe (B) without bending the lines.

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:43 PM

Fig. 131: Identifying Expansion Valve Cover, Bolts And Pipe
Courtesy of AMERICAN HONDA MOTOR CO., INC.

6. Remove the bolt (A), O-rings (B) and the expansion valve (C) without bending the pipe.

Fig. 132: Identifying Expansion Valve, O-Ring And Bolt
Courtesy of AMERICAN HONDA MOTOR CO., INC.

7. Install the valve in the reverse order of removal, and note these items:



If you're installing a new expansion valve, add refrigerant oil (DENSO ND-OIL 8) (see A/C
SERVICE TIPS AND PRECAUTIONS ).



Replace the O-rings with new ones at each fitting, and apply a thin coat of refrigerant oil before
installing them. Be sure to use the correct O-rings for HFC-134a (R-134a) to avoid leakage.



Immediately after using the oil, reinstall the cap on the container, and seal it to avoid moisture
absorption.



Do not spill the refrigerant oil on the vehicle; it may damage the paint; if the refrigerant oil
contacts the paint, wash it off immediately.



Make sure that there is no air leakage.



Charge the system (see SYSTEM CHARGING ).

HEATER UNIT/CORE REPLACEMENT

2007 Acura RL

2005-08 HVAC HVAC - RL

Friday, June 05, 2009 2:25:43 PM

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