1998 ACURA INTEGRA Service Repair Manual

A/C System Service
Performance Test
The performance test will help determine if the air con,
ditioner system is operating within specifications.
Use only service equipment that is U.L.-listed and is cer,
tified to meet the requirements of SAE J2210 to remove
HFC-134a (R-134a) from the air conditioner svstem.
CAUTION: Exposure to air conditioner retrigerant and
lubricant vapor or mist can irritate eyes, nose and
throat. Avoid breathing the air conditioner refrigerant
and lubricant vapor or mist.
lf accidental system discharge occurs, ventilate work
area before resuming service.
R-134a service equipment or vehicle air conditioner sys-
tems should not be pressure tested or leak tested with
compressed arr.
@ some mixtures of air and R-134a have
been shown to be combustible at elevated Dressures
and can result in fire or explosion causing iniury orproperty damage. Never use compressed air to pressure
test R-134a service equipment or vehicle air conditioner
systems.
Additional health and safety information may be
obtained from the refrigerant and lubricant manufactur-
ers.
Connect a R-134a refrigerant Recovery/Recycling/
Charging System to the vehicle, as shown, follow-
ing the equipment manufacturer's instructions.
Insen a thermometer in the center vent outlet.
Determine the relative humidity and air tempera-
IUre.
Test conditions:
. Avoid direct sunlight.
. Open hood.
. Open lront doors.
. Set the temperature control lever to MAX COOL,
the mode control switch on VENT and the recir-
culation control switch on RECIRCULATE.. Slide the heater fan switch on MAX.. Run the engine at 1.500 rpm.. No driver or passengers in vehicle.
After running the air conditioning for'10 minutes
under the above test conditions, read the delivery
temperature from the thermometer in the dashvent, and the high and low system pressure from
the A,/C gauges.
Recovo.v/Recycling/Charging System.
LOW.PRESSURE
l
22-24

JTo complete the chansl
. Mark the delivery temperature along the venical line.
. Mark the intake temperature (ambient air temperature) along the bottom lane.
. Draw a line straight up from the air temperature to the humidity.
. Mark a point one line above and one line below the humidity level (10 % above and 10 % below the humidity
level).
. From each point. draw a horizontal line across the delivery temperature.
. The delivery temperature should fall between the tlvo lines.
. Complete the low side pressure test and high side pressure test in the same way
. Any measurements outside the line may indicate the need for further inspection.
kpalkst/cm')tpsil2900t30)I4:'01
250{)t25)t3601
2000{20}I28ol
80 70
30%rp.lkgf/cm'llpsilDELIVERYPRESSURE
OEL|vENYPRESSURE
1500{151t2101
980{10)I14ol
INTAKEPRESSURE
11t5l
DELIVERYTEMPERATURE
INTAKE TEMPERATURE
22-25

Evaporator
Replacement
Cut the dashboard insulato. at the areas shown.
Disconnect the connector from the A,,/C thermostat.
and remove the wire harness clips from the evapo-
rator.
6 x 1.0 rnm9.8 N.m 11.0 kgf.m,7.2 tbl.ft)
EVAPOBATOB
7. Remove the four self-tapping screws. the mounting
bolt and the mounting nut.
8. Disconnect the drain hose, and remove the evapo-
rator.
9, Install in the reverse order of removal, and:
. if you're installing a new evaporator, add refrig-
erant oil (ND-OlL 8: PiN 38897 - PR7 - A0IAH or
38899 - PR7 - A0 I I lsee page 22-21) .. replace the O-rings with new ones at each fitting,
and apply a thin coat of refrigerant oil before
installing them.
NOTE: Be sure to use the right O-rings tor HFC-
134a (R-134a) to avoid leakage.
. apply sealant to the grommets.
. make sure that there is no air leakage.. charge the system (see page 22-39) and test itsperformance {see page 22-24l.
CLIPS
SRS components are located in this area. Review the
SRS component locations, precautions, and procedures
in the SRS section {23) before performing repairs or ser-
vice.
1. Recover the retrigerant with a Recovery/Recycling/
Charging System \see page 22-221.
2. Remove the bolts, and disconnect the receiver line
and the suction line from the evaporator.
NOTE: Plug or cap the lines immediately after dis-
connecting to avoid moisture and dust contamina-
UOn.
6x1.0mm9.8 N.m 11.0 kgf.m,1.2 tbi.ft)
Remove the glove box (see section 20).
Remove the four bolts and the glove box frame.4.
SUCTION LINE
RECEIVER LINE
22-26

J
Overhaul
Pull out the A,/C thermostat sensor from the evapo-
rator fins.
t
I
ir
I
Remove the self-tapping screws and clamps from
the housing.
3. Carefully separate the housings and remove the
evaporator.
4. lf necessary. remove the expansion valve.
NOTE: When loosening the expansion valve nuts,
use a second wrench to hold the expansion valve or
evaporator pipe. Otherwise, they can be damaged.
Assemble in the reverse order of disassembly.
Make note ot these items:
Replace the O-rings with new ones at each fit-
ting, and apply a thin cost of retrigerant oil (ND-
OIL 8: P/N 38897 - PR7 - A01AH or 38899 - PR7 -
A01) before installing them.
NOTE: Be sure to use the right O-rings for HFC-
134a (R-134a) to avoid leakage.
Install the expansion valve capillary tube with
the capillary tube in contact with the suction line
directly, and wrap it with tape.
Reinstall the Ay'C thermostat sensor to its original
location.
TAPEReplace.Make sure there is no foreign matter stuck between
tEVAPORATORblow dirt out of tinswith compressed alr'8 N.m {0.8 kgt'm.6 rbf.ftl
CAPILLARY TUBE
EXPANSION VALVE
24 N.m (2.{ kgtm.17 rbf.ftl
UPPER HOUSING
%
6th tin f.om outlet sido
A/C THERMOSTATTest, page 22'19
EVAPORATOR LID
22-27

This compressor is a Nippondenso piston type compressor for HFC-134a (R-134a). A revolving inclined disc drives the sur-rounding 10 reciprocating pistons. As the inclined disc revolves, it pushes the pistons, ,protected by a ceramic shoe, thuscompressing the refrigerant.
FIELD COIL
ar:o@
o-> @ ______-__> o,_______> @
r____________l
Compressor
Description
\
22-28

lllustratedlndex
CLUTCHSETlnspection,Page 22-32
SNAP RING AReplace.
FIELD COILInspection, page 22-32
I / COMPRESSOR COMPLETE
.-- lDo not disassemble)
SUCTION SERVICE VALVEO.RINGReplace.
I
S..-
VX
I
I ^.-{\
I.ory
O.RINGReplace.RELICF VALVER€placement. page 22-34
22-29

Compressor
Replacement
lf the compressor is marginally operable, run the
engine at idle speed, and let the air conditioner
work a few minutes. Then shut the engine off.
Recover the refrigerant with a Recovery/Recycling/
Charging System \see page 22-22).
Remove the power steering pump (see section 17).
NOTE: Do not disconnect the hoses from the power
steering pump.
Disconnect the condenser fan connector.
Disconnect the compressor clutch connector, then
remove the compressor clutch connector and the
clips from the condenser fan shroud
Remove the two mounting bolts and the condenser
fan shroud.
NOTE: Be careful not to damage the radiator fins
when removing the condenser fan shroud.
1.0 mmN.m (1.0 kgt.m,rbf.ftt
CONDENSER FAN SHROUD
COMPRESSOR CLUTCH CONNECTOR
5. Remove the bolts, then disconnect the suction line
and the discharge line from the compressor.
NOTE: Plug or cap the lines immediately aiter dis-
connecting to avoid moisture and dust contamina-
tio n.
6x1.0mm9.8 N.m (1.0 kgf.m, 7.2 lbf.ft)
22-30
6. Loosen the adjusl pulley bracket pivot bolt and the
adjusting bolt, then remove the A/C compressor
belt from the Dullev as shown.
ADJUSTING BOLT
A/C COMPRESSOR BELT
Remove the four mounting bolts and the compres-
sor.
NOTE: Be careful not to damage the radiator fins
when removing the compressor.
7.
./.,
COMPRESSOR

J8. Remove the four bolts and the suction servtce valve
from the compressor.
25.s18.8 tbf.ft)N.m {2.6 kgt.m,
A\
-/ l=\'zI
i:-
9.
SUCTION SERVICEVALVE
O-RING \Benrace. --'.l4p
lf necessary, remove the compressor bracket as fol
- Remove the engine mount nut and the washer'
NOTE: When tightening the engane mount nut,
make sure the washer is set properly on the left
front engine mount as shown.
- Remove the four mounting bolts and the com-
pressor bracket.
LEFT FRONTENGTNE MOUNT 12 x 1.25 mm
I
69 N.m {7.0 kg{.m.s1 rbt.ft)
10 x 1.25 mm47 N.m (4.8 kgf.m.35 rbf.ftt
10. lnstall in the reverse order of removal. Make note of
these rtems:
) lf you're installing a new compressor, drain all
the refrigerant oil from the removed compressor,
and measure its volume, Subtract the volume of
drained oil from 140 m{ 14 2/3ll.oz,4.93 imp.oz);
the result is the amount of oil you should drain
from the new compressor (through the suction
{itting).
r Replace the O-rings with new ones at each fit-
ting, and apply a thin coat of refrigerant oil
before installing them.
NOTE: Be sure to use the right O-rings for HFC-'t34a (R-134a) to avoid leakage.
. use refrigerant oil (ND-OlL 8: P/N 38897 PR7-
A0IAH or 38899 - PR7 - A01) for R-'134a DENSO
piston type compressors onlY.
. To avoid contamination, do not return the oil to
the container once dispensed, and never mix it
with other refrigerant oils.
. lmmediately after using the oil, replace the cap
on the container, and seal it to avoid moisture
aDsorDt|on.
. Do not spill the refrigerant oil on the vehicle; it
may damage the paint; if the refrigerant oil con-
tacts the Daint, wash it off immediately.
. Do not damage the radiator fins when installing
the condenser fan shroud and the compressor.
. Adjust the Ay'C compressoi belt {see page 22-36J
. Adjust the power steering pump belt (see section
17J.
. Charge the system (see page 22-39) and test its
performance {see Page 22-24).
WASHER
22-31