Acura RSX Honda Integra. Manual - part 411

21-51

Blower Unit Component Replacement

Note these items when overhauling the blower unit:

• The recirculation control motor (A), the power transistor (B), the blower motor (C), and the dust and pollen filters (D)

can be replaced without removing the blower unit.

• Before reassembly, make sure that the recirculation control linkage and doors move smoothly without binding.
• After reassembly, make sure the recirculation control motor runs smoothly (see page 21-47).

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21-52

Climate Control

Evaporator Core Replacement

6 x 1.0 mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)

1. Recover the refrigerant with a recovery/recycling/

charging station (see page 21-62).

2. Remove the bolt, then disconnect the suction line

(A) and the receiver line (B) from the evaporator
core.

3. Remove the blower unit (see page 21-50).

4. Remove the self-tapping screws and the expansion

valve cover.

5. Carefully pull out the evaporator core without

bending the pipes.

6. Install the core in the reverse order of removal, and

note these items:

• If you’re installing a new evaporator core, add

refrigerant oil (KEIHIN SP-10) (see page 21-6).

• 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 page 21-64).

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21-53

Heater Unit/Core Replacement

6 x 1.0 mm
9.8 N·m
(1.0 kgf·m, 7.2 lbf·ft)

SRS components are located in this area. Review the
SRS component locations (see page 23-10), and the
precautions and procedures (see page 23-11) before
performing repairs or service.

1. Turn the ignition switch ON (II).

2. Turn the mode control dial to the floor vent position.

This will prevent the mode control doors from
being damaged when the dashboard is removed.

3. Turn the ignition switch OFF.

4. Make sure you have the anti-theft code for the radio,

then write down the frequencies for the radio’s
preset buttons.

5. Disconnect the negative cable from the battery.

6. Disconnect the suction and receiver lines from the

evaporator core (see page 21-52).

7. From under the hood, open the cable clamp (A),

then disconnect the heater valve cable (B) from the
heater valve arm (C). Turn the heater valve arm to
the fully opened position as shown.

8. When the engine is cool, drain the engine coolant

from the radiator (see page 10-6).

9. Slide the hose clamps (A) back, then disconnect the

inlet heater hose (B) and the outlet heater hose (C)
from the heater core. Engine coolant will run out
when the hoses are disconnected; drain it into a
clean drip pan. Be sure not to let coolant spill on
the electrical parts or the painted surfaces. If any
coolant spills, rinse it off immediately.

10. Remove the mounting bolt and the heater valve as

shown.

(cont’d)

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21-54

Climate Control

Heater Unit/Core Replacement (cont’d)

8 x 1.25 mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)

6 x 1.0 mm
9.8 N·m (1.0 kgf·m, 7.2 lbf·ft)

11. Remove the mounting nut from the heater unit.

Take care not to damage or bend the fuel lines and
the brake lines, etc.

12. Remove the dashboard (see page 20-69).

13. Remove the blower unit (see page 21-50).

14. Disconnect the drain hose (A), then remove the

wire harness (B), the mounting bolts and the heater
unit (C).

15. Remove the self-tapping screws and the expansion

valve cover (A). Carefully pull out the evaporator
core (B) so you don’t bend the inlet and outlet pipes.
Remove the grommet (C), then remove the self-
tapping screws and the flange cover (D). Remove
the self-tapping screws and the pipe cover (E), then
carefully pull out the heater core (F) so you don’t
bend the inlet and outlet pipes.

16. Install the heater core and the evaporator core in

the reverse order of removal.

17. Install the heater unit in the reverse order of

removal, and note these items:

• Do not interchange the inlet and outlet heater

hoses, and install the hose clamps securely.

• Refill the cooling system with engine coolant

(see page 10-6).

• Be sure to connect the drain hose securely.
• Adjust the heater valve cable (see page 21-55).
• Make sure that there is no coolant leakage.
• Make sure that there is no air leakage.
• Do the ECM/PCM idle learn procedure (see page

11-349).

• Do the power window control unit reset

procedure (see page 22-148).

• Enter the anti-theft code for the radio, then enter

the customer’s radio station presets.

• Refer to evaporator core replacement (see step 6

on page 21-52).

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