Acura CSX. Manual — part 492

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21-83

21-83

A/C Compressor Replacement

A

C

B

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

A

B

13. Remove the self-tapping screws, the heater core

cover (A), the grommet (B). and carefully pull out
the heater core (C).

14. Install the heater core and the evaporator core in

the reverse order of removal.

15. 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 10-8).

• Make sure that there is no coolant leakage.
• Make sure that there is no air leakage.
• Refer to evaporator core replacement (see page

21-78).

16. Do the battery terminal reconnection procedure

(see page 22-68).

NOTE: Do not install an A/C compressor into a system
unless you are completely sure that the system is free
of contamination. Installing the A/C compressor into a
contaminated system can result in premature A/C
compressor failure.

1. If the A/C compressor is marginally operable, run

the engine at idle speed, and let the air
conditioning work for a few minutes, then shut the
engine off.

2. Recover the refrigerant with a recovery/recycling/

charging station (see page 21-90).

3. Remove the drive belt (see page 4-31).

4. Remove the front bulkhead and the condenser fan

shroud (see page 10-19).

5. Remove the splash shield (see page 20-172).

6. Remove the bolt and the nut, then disconnect the

suction hose (A) and discharge hose (B) from the
A/C compressor. Plug or cap the lines immediately
after disconnecting them to avoid moisture and
dust contamination.

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21-84

Climate Control

8 x 1.25 mm
22 N·m
(2.2 kgf·m, 16 lbf·ft)

A

7. Remove the mounting bolts and the A/C

compressor (A). Be careful not to damage the
radiator fins when removing the A/C compressor.

8. Install the compressor in the reverse order of

removal, and note these items:

• Inspect the A/C lines for any signs of

contamination.

• If you’re installing a new A/C compressor, you

must calculate the amount of refrigerant oil to be
removed from it (see page 21-7). A new A/C
compressor comes with a full charge of oil.

• 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.

• Use refrigerant oil (SP-10) for HFC-134a SANDEN

spiral type A/C compressor only.

• To avoid contamination, do not return the oil to

the container once dispensed, and never mix it
with other refrigerant oils.

• 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.

• Charge the system (see page 21-92).

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−

−

−

Clearance:

0.35

0.65 mm (0.014

0.026 in.)

Field Coil Resistance:

3.15

3.45

20 °C (68 °F)

21-85

A/C Compressor Clutch Check

A

B

A

1. Check the armature plate for discoloration, peeling,

or other damage. If there is damage, replace the
clutch set (see page 21-86).

2. Check the rotor pulley bearing play and drag by

rotating the rotor pulley by hand. Replace the
clutch set with a new one if it is noisy or has
excessive play/drag (see page 21-86).

3. Measure the clearance between the rotor pulley (A)

and the armature plate (B) all the way around. If the
clearance is not within specified limits, remove the
armature plate (see page 21-86) and add or remove
shims as needed to increase or decrease clearance.

NOTE: The shims are available in four thicknesses:
0.1 mm, 0.2 mm, 0.4 mm, and 0.5 mm.

4. Check the thermal protector for continuity between

the A/C compressor clutch connector terminals
No. 1 and No. 3. If there is no continuity, replace the
thermal protector (see page 21-87).

NOTE: The thermal protector will have no
continuity above about 122 to 128 °C (252 to 262 °F).
When the temperature drops below about 116 to
104 °C (241 to 219 °F), the thermal protector will
have continuity.

5. Disconnect the field coil connector (A). Check

resistance of the field coil. If resistance is not within
specifications, replace the field coil (see page
21-86).

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Special Tools Required

21-86

Climate Control

A/C Compressor Clutch Overhaul

25.5 N·m
(2.6 kgf·m, 18.8 lbf·ft)

A

B

A

B

A

B

A

B

C

D

1.3 N·m
(0.1 kgf·m, 1.0 lbf·ft)

A/C clutch holder, Robinair 10204 or Kent-Moore
J37872, or Honda Tool and Equipment KMT-J33939,
commercially available

1. Remove the center nut while holding the armature

plate (A) with a commercially available A/C clutch
holder (B).

2. Remove the armature plate (A) and shim(s) (B),

taking care not to lose the shim(s). If the clutch
needs adjustment, increase or decrease the
number and thickness of shims as necessary, then
reinstall the armature plate, and recheck its
clearance (see page 21-85).

NOTE: The shims are available in four thicknesses:
0.1 mm, 0.2 mm, 0.4 mm, and 0.5 mm.

3. If you are replacing the field coil, remove the snap

ring (A) with snap ring pliers, then remove the rotor
pulley (B). Be careful not to damage the rotor pulley
and A/C compressor.

4. Remove the bolt and holder (A), then disconnect

the field coil connector (B). Remove the snap ring
(C) with snap ring pliers, then remove the field coil
(D). Be careful not to damage the field coil and A/C
compressor.

5. Reassemble the clutch in the reverse order of

disassembly, and note these items:

• Install the field coil with the wire side facing

down, and align the boss on the field coil with the
hole in the A/C compressor.

• Clean the rotor pulley and A/C compressor

sliding surfaces with contact cleaner or other
non-petroleum solvent.

• Install new snap rings, note the installation

direction, and make sure they are fully seated in
the groove.

• Make sure that the rotor pulley turns smoothly

after it’s reassembled.

• Route and clamp the wires properly or they can

be damaged by the rotor pulley.

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