1998 ACURA INTEGRA radiator cap

Heater Unit
Replacement
SRS components are located in this area. Review the
SRS component locatio.s, precautions, and procedures
in the SRS section (23) before performing repairs or ser-
vtce.
1. When the engine is cool, drain the engine coolant
from the radiator (see section 1O).
@ oo not remove the radiator cap when
the engine is hot; the engine coolant is undol
prsssure and could sevdely scald you.
2. Ooen the clamD, then disconnect the heater valve
cable from the heater valve arm.
HEATER VALVE CABI-E
I
i
21-22
3. Disconnect the heater hoses lrom the heater unit.
CAUTION: Engine coolant will damaga paint. Ouick-
ly rinse any spilled engine coolant from painted
sudaces.
NOTE: Engine coolant will run out when the hoses
are disconnected, drain it into a clean drip pan.
4. Remove the mounting nut from the heater unit.
NOTE: When removing the mounting nut, take care
not to damage or bend the fuel pipes, brake pipes,
etc.
8 x 1.25 mm22 N'llt. 12.2 kgl'm, 16 lbl.tl)
CLAMPS
HEATER HOSES

.J
5.
6.
7.
8.
Remove the dashboard (see section 2O).
Remove the heater duct (see page 21 20) or the
evaporator lsee page 22-261.
Remove the two bolts, the nut and the passenger's
SRS beam.
PASSENGER'SSRS BEAM
Disconnect the mode control motor connector. and
remove the wire harness clip from the heater unit.
Remove the two mounting nuts and the heater unit.
6 x 1.0 mm9.8 N.m (1.0 kgf.m, 7.2 lbf.ftl
I r 1.25 mm22 N.m 12.2 kgf.m, 16 lbf'ft)
Il
I
I
lnstall in the reverse order of removal. Make note of
these items:
. Apply sealant to the grommets
. Do not interchange the inlet and outlet hoses.
Make sure that the hose clamps are secure.
. Loosen the bleed bolt on the engine and refill the
radiator and coolant reservoir with the proper
engine coolant minure (see section 10).
Tighten the bleed bolt when all the trapped air
has escaped and engine coolant begins to flow
from it (see section 10).
. Connect all cables and make sure they are prop-
erly adjusted (see page 2'l-271.
;!
i
21-23

J
Pressure Test Chart
Performance Test on page 22.24.
TEST RESULTSRELATED SYMPTOMSPROBABLE CAUSEREMEDY
Discharge (highlpressure
abnormally high
After stopping compressor, pressure
drops about 200 kPa (2.0 kgflcm',28psi) quickly, and then falls gradually.
Air in systemRecover, evacuate and rechargewith specified amount.Evacuation: see pag€ 22-38Charging: see page 22-39
Reduced or no air tlow throughconoenser.
. Clogged condenser orradiator fins. Condenser or radialor fannot working proPerly
CleanCheck voltage and fan rpmCheck fan direction
Line lo condenser is excessively hot.Restricted flow of felrigerantin systemRestricted lines
Dischargepressureabnormally low
High and low pressures are balancedsoon after stopping compressor. Lowside is higherthan normal.
. Faulty compressordischarge valve. Faulty compressor seal
Replace the compressor.
Outlet of expansion valve is notfrosted, low pressure gauge
indicates vacuum.
. Faulty expansion valve. lvloisture in system
. Replace. Recover, evacuate and rechargewith specified amount.
Suction (low)pressure
abnormally low
Expansion valve is not frosted andlow-pressure line is not cold. Lowpressure gauge indicates vacuum.
Frozen expansion valveFaulty expansion valveReplace the expansion valve.
Discharge temperature is low and theairflow from vents is restricted.Frozen evaporatorRun the fan with compressor off,then check A,/C thermostat.
Expansion valve is frosted.Clogged expansion valveClean or replace.
Receiver/dryer outlet is cool and inletis warm (should be warm duringoperal|onJ.
Clogged receiver/dryerReplace
Suctionpressureabnormally high
Low-pressure hose and seryicevalve are cooler than the temPera-ture around evaporator.
Expansion valve open toolongLoose expansion capillarytube
Repair or replace.
Suction pressure is lowered whencondenser is cooled by water.Excessive refrigerant insystemRecover. evacuate and rechargewith specified amount.
High and low pressure are equalizedas soon asthe compressor asstopped, and both gauges fluctuatewhile running.
Faulty gasket
Faulty high-pressure valveForeign panicle stuck in highpressure valve
Reolace the comDressor.
Suction and dis-charge pr€ssuresabnormally high
Reduced air flow throughcondenser.
. Clogged condenser orradiator fins. Condenser or radiator lannot working properly.
Clean condenser and radiatorCheck voltage and fan rpmCheck fan direction
No bubbles in sight glass whencondenser is cooled bv water.Excessive refrigerant in systemRecover. evacuate and rechargewith specified amount.
Suction anddischargepfessure
abnormally low
Low-pressure hose and metal endareas are cooler than evaDorator.Clogged or kinked lowpressure hose partsRepair or replace.
TemP€rature around expansionvalve is too low compared with thataround receiv€r/dryer.
Clogged high-pressure lineRepair or replace.
RetrigerantleaksCompressor clutch is dirty.Compressor shaft seal leakingReplace the compressor.
Comoressor bolt(s) are dirty.Leaking around bolt(s)Tighten bolt{s) or replacecompressor.
Compressor gasket is wet with oil.Gasket leakingReolace the comoressor.
22-23

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

Condenser
J
Replacement
RADIATOR UPPERMOUNT BRACKETS
Recover the refrigerant with a Recovery/Recycling/
Charging System lsee page 22-221.
Remove the coolant reservoir.
NOTE: Do not disconnect the reservoir hose from
the coolant reservoir and the radiator.
Remove the bolts and the radiator upper mount
brackets. then remov6 the boll from the suction
hose bracket.
COOLANT RESERVOIR
6x1.0mm9.8 N'm 11.0 kgf'm, ?.2lbf'ft)
4. Remove the bolts, then disconnect the discharge
line and the condenser line from the condenser.
NOTE: Plug or cap the lines immediately after dis-
connecting them to avoid moisture and dust con'
tamination.
DISCHARGE LINE
6x1.0mm9.8 N.m {1.0 kgj'm, 7.2 lbl'ft)
5. Remove the two mounting bolts, then lift out the
condenser as shown.
NOTE: Be careful not to damage the radiator and
condenser fins when removing the condenser.
6x1.0mm9.8 N m 11.0 kgf m, 7.2 lbf ft)
lnstall in the reverse order of removal. Make note of
these items;
. lf you're instslling a new condenser, add refriger-
ant oil (ND-olL 8: P/N 38897-PR7-A01AH or 38899- PR7 - A01) (see page 22-211.
. 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-
134a (R-1344) to avoid leakage.
a Do not damage the radiator and condenser fins
when installing the condenser.
o Be sure to install the condenser mount cushions
securely into the holes.
. Charge the system {see page 22-39) and test its
performance (see page 22-241.
CONOENSER LINE
22-37

Standards and Service Limits
missions - Section 11
* Including the pedal play 1 - 10 mm (0.04 - 0.39 in).
0Gooling - Sectlon
MEASUREMENTSTANDARD (NEW}
RadiatorCoolant capacity / (US qt, lmp qt) 81881 engine
I Including engine, heater, II cooling line and reservoir IReservoir capacity:0.6 f (0.63 US qt, 0.53 lmp qt) 818C1 engine
818C5 engine
M/T: 6.4 (6.8, 5.6) for overhaul4.4 14.6,3.9) for coolant change*
A,/T: 6.7 (7.1, 5.9) for overhaul4.7 $.0,4.1)for coolant change*
M/T: 6.7 (7.1,5.9) for overhaul4.7 (5.0, 4.1) for coolant change*
M/T: 6.5 (6.9, 5.7) for overhaul4.5 (4.8, 4.0) for coolant change*
Radiator capOpening pressure kPa (kgf/cm', Psi)93 - 123 (0.95 - 1.25, 13.5 - 17.8)
ThermostatStart to open 'F ("C)
Fully open "F ("C)
Valve lift at fully open
169 - 176 (76 - 80)194 (90)
8.0 (0.31)min.
Cooling fanThermoswitch "ON" temperature "F ('C)
Thermoswitch "OFF" temperature "F ("C)196 - 203 (91 - 95)Subtract 5 - 14 (3 - 8) from actual "ON" temperature
*: Including the coolant in the reservoir and that remaining in the engine
Fuel and E
MEASUREMENTSTANDARD (NEW}SERVICE LIMIT
Pressure regulatorPressure with regulator vacuum hose disconnected
kPa (kgf/cm', psi) 81881 engine818C1 engine818C5 engine
270 - 320 (2.8 - 3.3, 40 - 47].
329 - 378 (3.35 - 3.85, 48 - 55)
320 - 370 (3.3 - 3.8, 47 -541
Fuel tankCapacity / (US gal, lmp gal)50 (13.2, 11.0)
Engineldle speed with headlight and cooling fan off rpm81881, 818C1 engines 750 t 50 (M/T: neutral)750 I 50 (A/T: N or E Position)818C5 engine 800 t 50 (M/T: neutral)
Fast idle rpmB1881, 818C1 engines 1,600 t 200 (M/T: neutral)1,600 t 200 (A/T: E or E Position)818C5 engine 1,500 t 200 (M/T: neutral)
ldle CO %0.1 max.
Clutch - Section 'lZ
MEASUREMENTSTANDARD (NEW}SERVICE LIMIT
Clutch pedalPedal height to floor
StrokePedal playDisengagement height to floor
164 (6 7/16)130 - 140 (5.12 - 5.51)12 -21 (12 - 13/16)*83 (3.27) min.
FlywheelClutch surface runoul0.05 (0.002) max,0.15 (0.006)
Clutch discRivet head depthThickness
1.2 - 1.7 (0.05 - 0.07)8.3 - 9.0 (0.33 - 0.35)0.2 (0.01)
6.0 (0.24)
Pressu re plateWarpageDiaphragm spring finger alignmenl
0.03 (0.001) max.0.6 (0.021 max.
0.15 (0.006)
0.8 (0.03)
3-6

tt.Pour Honda All Season Antifreeze/Coolant Type 2into the radiator up to the base of the filler neck.
NOTE:
o Always use Honda All Season Antifreeze/Coolant
Type 2. Using a non-Honda coolant can result incorrosion, causing the cooling system to mal-function or fail.
o Honda All Season Antifreeze/Coolant Type 2 is amixture of 50% antifreeze and 50% water.Premixing is not required.
Engine Coolant Refill Gapacity [including reservoir(0.6 f {0.6 US qt, 0.5 lmp qtlll:
81881 engine:
M/T: 4.4 / {4.6 US qt, 3.9 lmp qtl
B18B1, Bl8Cl engines:
AIT:4.7 / (5.0 US qt,4.1 lmp qtl
818C1, B18C5 engines:
MIT:4.7 / (5.0 US qt,4.1 lmp qtl
FILLER NECK
Fill up to here
9.
10.
11.
12.
Install the radiator cap loosely.
Install the battery.
Start the engine and let it run until it warms up (the
radiator fan comes on at least twice).
Turn off the engine. Check the level in the radiator,
and add Honda All Season Antifreeze/Coolant Type2 if needed.
Put the radiator cap on tightly, then run the engine
again and check for leaks.
13.