
ENGINE LUBRICATION &
COOLING SYSTEMS
SECTION
LC
CONTENTS
QG
ENGINE LUBRICATION SYSTEM..................................3
Precautions ..................................................................3
LIQUID GASKET APPLICATION PROCEDURE............3
Preparation ..................................................................3
SPECIAL SERVICE TOOLS........................................3
Lubrication Circuit ........................................................4
Oil Pressure Check......................................................5
Oil Pump ......................................................................5
REMOVAL AND INSTALLATION.................................5
DISASSEMBLY AND ASSEMBLY................................6
INSPECTION.............................................................7
REGULATOR VALVE INSPECTION............................7
Changing Engine Oil....................................................8
Changing Oil Filter .......................................................9
Service Data and Specifications (SDS).....................10
OIL PRESSURE CHECK..........................................10
OIL PUMP INSPECTION..........................................10
REGULATOR VALVE INSPECTION..........................10
OIL CAPACITY........................................................10
ENGINE COOLING SYSTEM........................................ 11
Precautions ................................................................ 11
LIQUID GASKET APPLICATION PROCEDURE.......... 11
Preparation ................................................................ 11
SPECIAL SERVICE TOOLS...................................... 11
Cooling Circuit ...........................................................12
System Check............................................................12
CHECKING COOLING SYSTEM HOSES...................12
CHECKING RADIATOR............................................13
CHECKING RADIATOR CAP....................................13
CHECKING COOLING SYSTEM FOR LEAKS............13
Water Pump ...............................................................14
REMOVAL AND INSTALLATION...............................14
INSPECTION...........................................................14
Thermostat .................................................................15
REMOVAL AND INSTALLATION...............................15
INSPECTION...........................................................16
Radiator .....................................................................16
COMPONENTS.......................................................16
Cooling Fan ...............................................................17
COMPONENTS.......................................................17
CONTROL SYSTEM................................................17
Changing Engine Coolant..........................................17
- DRAINING ENGINE COOLANT -............................17
- REFILLING ENGINE COOLANT -...........................18
- FLUSHING COOLING SYSTEM -............................19
Radiator (Aluminum type) ..........................................20
PREPARATION.......................................................20
DISASSEMBLY........................................................20
ASSEMBLY.............................................................21
INSPECTION...........................................................22
Overheating Cause Analysis .....................................23
Service Data and Specifications (SDS).....................24
THERMOSTAT........................................................24
RADIATOR..............................................................24
COOLANT CAPACITY..............................................24
YD
ENGINE LUBRICATION SYSTEM................................25
Precautions ................................................................25
LIQUID GASKET APPLICATION PROCEDURE..........25
Preparation ................................................................25
SPECIAL SERVICE TOOLS......................................25
Lubrication Circuit ......................................................26
Oil Pressure Check....................................................27
Oil Pump ....................................................................27
REMOVAL AND INSTALLATION...............................27
DISASSEMBLY AND ASSEMBLY..............................28
OIL PUMP INSPECTION..........................................28
REGULATOR VALVE INSPECTION..........................29
Changing Engine Oil..................................................30
Oil Filter Bracket ........................................................31
REMOVAL AND INSTALLATION...............................31
Changing Oil Filter .....................................................31
REMOVAL...............................................................32
INSTALLATION........................................................32
Oil Cooler ...................................................................33
REMOVAL AND INSTALLATION...............................33
Service Data and Specifications (SDS).....................34
OIL PRESSURE CHECK..........................................34

REGULATOR VALVE INSPECTION..........................34
OIL PUMP INSPECTION..........................................34
ENGINE OIL CAPACITY...........................................34
ENGINE COOLING SYSTEM........................................35
Precautions ................................................................35
LIQUID GASKET APPLICATION PROCEDURE..........35
Preparation ................................................................35
SPECIAL SERVICE TOOLS......................................35
Cooling Circuit ...........................................................36
System Check............................................................37
CHECKING COOLING SYSTEM HOSES...................37
CHECKING RADIATOR............................................37
CHECKING RADIATOR CAP....................................37
CHECKING COOLING SYSTEM FOR LEAKS............38
Water Pump ...............................................................38
REMOVAL AND INSTALLATION...............................38
REMOVAL...............................................................39
INSPECTION...........................................................39
INSTALLATION........................................................39
Thermostat .................................................................40
REMOVAL AND INSTALLATION...............................40
INSPECTION...........................................................41
Radiator .....................................................................41
COMPONENTS.......................................................41
REMOVAL AND INSTALLATION...............................42
Cooling Fan ...............................................................42
COMPONENTS.......................................................42
CONTROL SYSTEM................................................42
Changing Engine Coolant..........................................43
- DRAINING ENGINE COOLANT -............................43
- REFILLING ENGINE COOLANT -...........................43
- FLUSHING COOLING SYSTEM -............................45
Radiator (Aluminum type) ..........................................46
Overheating Cause Analysis .....................................46
Service Data and Specifications (SDS).....................47
THERMOSTAT........................................................47
RADIATOR..............................................................47
ENGINE COOLANT CAPACITY................................47
CONTENTS(Cont'd)
LC-2

Service Data and Specifications (SDS)
OIL PRESSURE CHECKNJLC0011
Engine speed
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
600 More than 98 (0.98, 1.0, 14)
2,000 More than 294 (2.94, 3.0, 43)
6,000 More than 392 (3.92, 4.0, 57)
OIL PUMP INSPECTIONNJLC0013Unit: mm (in)
Body to outer rotor radial clearance 0.250 - 0.325 (0.0098 - 0.0128)
Inner rotor to outer rotor tip clearance Below 0.18 (0.0071)
Body to inner rotor clearance 0.030 - 0.085 (0.0012 - 0.0033)
Body to outer rotor axial clearance 0.030 - 0.090 (0.0012 - 0.0035)
Inner rotor to brazed portion of housing clear-
ance0.045 - 0.091 (0.0018 - 0.0036)
REGULATOR VALVE INSPECTIONNJLC0012Unit: mm (in)
Regulator valve to oil pump cover clearance 0.052 - 0.088 (0.0020 - 0.0035)
OIL CAPACITYNJLC0036Unit:!(Imp qt)
With oil filter change2.7 (2-3/8)
Without oil filter change2.5 (2-1/4)
Dry engine (engine overhaul)3.1 (2-3/4)
ENGINE LUBRICATION SYSTEMQG
Service Data and Specifications (SDS)
LC-10

Symptom Check items
Except cool-
ing system
parts mal-
functionÐ Overload on engineAbusive drivingHigh engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system malfunc-
tion
Ð Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper Ð
Ð Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator Ð
Blocked condenser
Ð
Installed large fog lamp
Service Data and Specifications (SDS)
THERMOSTATNJLC0029
Valve opening temperature ÉC (ÉF) 82 (180)
Valve lift mm/ÉC (in/ÉF)More than 8/95 (0.31/203)
RADIATORNJLC0030Unit: kPa (bar, kg/cm2, psi)
Cap reliefpressureStandard 78 - 98 (0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Limit 59 - 98 (0.59 - 0.98, 0.6 - 1.0,9-14)
Leakage test pressure157 (1.57, 1.6, 23)
COOLANT CAPACITYNJLC0038Unit:!(Imp qt)
M/T*6.7 (5-7/8)
A/T*Sedan 6.6 (5-7/8)
Hatchback 6.7 (5-7/8)
Reservoir tank0.7 (5/8)
*: With reservoir tank
ENGINE COOLING SYSTEMQG
Overheating Cause Analysis (Cont'd)
LC-24

Service Data and Specifications (SDS)
OIL PRESSURE CHECK=NJLC0048
Engine speed
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed More than 140 (1.40, 1.43, 20.3)
2,000 More than 270 (2.69, 2.75, 39.1)
4,000 More than 430 (4.29, 4.38, 62.3)
REGULATOR VALVE INSPECTIONNJLC0049Unit: mm (in)
Regulator valve to oil pump cover clearance 0.040 - 0.097 (0.0016 - 0.0038)
OIL PUMP INSPECTIONNJLC0050Unit: mm (in)
Body to outer rotor radial clearance 0.114 - 0.260 (0.0045 - 0.0102)
Inner rotor to outer rotor tip clearance Below 0.18 (0.0071)
Body to inner rotor axial clearance 0.050 - 0.090 (0.0020 - 0.0035)
Body to outer rotor axial clearance 0.030 - 0.190 (0.0012 - 0.0075)
Inner rotor to brazed portion of housing clearance 0.045 - 0.091 (0.0018 - 0.0036)
ENGINE OIL CAPACITYNJLC0078Unit:!(Imp qt)
Drain and refill (Approximately)Without oil filter change 4.9 (4-3/8)
With oil filter change 5.2 (4-5/8)
Dry engine (engine overhaul)6.3 (5-1/2)
ENGINE LUBRICATION SYSTEMYD
Service Data and Specifications (SDS)
LC-34

Symptom Check items
Except cool-
ing system
parts mal-
functionÐ Overload on engineAbusive drivingHigh engine rpm under
no load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system malfunc-
tion
Ð Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flowBlocked bumper Ð
Ð Blocked radiator grilleInstalled car brassiere
Mud contamination or
paper clogging
Blocked radiator Ð
Blocked condenser
Ð
Installed large fog lamp
Service Data and Specifications (SDS)
THERMOSTATNJLC0071
Valve opening temperature Above 80.5 - 83.5ÉC (177 - 182ÉF)
Valve liftMore than 9.0 mm/95ÉC (0.354 in/203ÉF)
RADIATORNJLC0073Unit: kPa (bar, kg/cm2, psi)
Cap relief pressureStandard 78 - 98 (0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Limit 59 - 98 (0.59 - 0.98, 0.6 - 1.0,9-14)
Leakage test pressure157 (1.57, 1.6, 23)
ENGINE COOLANT CAPACITYNJLC0080Unit:!(Imp qt)
With reservoir tank8.7 (7-5/8)
Reservoir tank0.7 (5/8)
ENGINE COOLING SYSTEMYD
Overheating Cause Analysis (Cont'd)
LC-47

CLOSED THROTTLE POSITION SWITCH
(WHERE FITTED)........................................................426
Component Description ...........................................426
ECM Terminals and Reference Value .....................426
Wiring Diagram ........................................................427
Diagnostic Procedure ..............................................428
Component Inspection .............................................431
INTAKE VALVE TIMING CONTROL SOLENOID
VALVE..........................................................................432
Component Description ...........................................432
Operation .................................................................432
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................432
ECM Terminals and Reference Value .....................432
Wiring Diagram ........................................................433
Diagnostic Procedure ..............................................434
Component Inspection .............................................436
A/T COMMUNICATION LINE......................................437
System Description ..................................................437
Wiring Diagram ........................................................438
Diagnostic Procedure ..............................................439
PARK/NEUTRAL POSITION (PNP) SWITCH............441
Component Description ...........................................441
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................441
ECM Terminals and Reference Value .....................441
Wiring Diagram ........................................................442
Diagnostic Procedure ..............................................443
INJECTOR...................................................................446
Component Description ...........................................446
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................446
ECM Terminals and Reference Value .....................446
Wiring Diagram ........................................................447
Diagnostic Procedure ..............................................448
Component Inspection .............................................450
IGNITION SIGNAL.......................................................451
Component Description ...........................................451
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................451
ECM Terminals and Reference Value .....................451
Wiring Diagram ........................................................452
Diagnostic Procedure ..............................................454
Component Inspection .............................................458
START SIGNAL...........................................................460
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................460
ECM Terminals and Reference Value .....................460
Wiring Diagram ........................................................461
Diagnostic Procedure ..............................................462
FUEL PUMP.................................................................464
System Description ..................................................464Component Description ...........................................464
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................464
ECM Terminals and Reference Value .....................465
Wiring Diagram ........................................................466
Diagnostic Procedure ..............................................467
Component Inspection .............................................469
POWER STEERING OIL PRESSURE SWITCH.........470
Component Description ...........................................470
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................470
ECM Terminals and Reference Value .....................470
Wiring Diagram ........................................................471
Diagnostic Procedure ..............................................472
Component Inspection .............................................473
REFRIGERANT PRESSURE SENSOR......................475
Description ...............................................................475
ECM Terminals and Reference Value .....................475
Wiring Diagram ........................................................476
Diagnostic Procedure ..............................................477
ELECTRICAL LOAD SIGNAL.....................................480
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................480
ECM Terminals and Reference Value .....................480
Wiring Diagram ........................................................481
Diagnostic Procedure - Load Signal - .....................483
Diagnostic Procedure - Heater Control Panel
(Fan Switch) - ..........................................................487
MI & DATA LINK CONNECTORS..............................488
Wiring Diagram ........................................................488
SERVICE DATA AND SPECIFICATIONS (SDS).......489
Fuel Pressure Regulator..........................................489
Idle Speed and Ignition Timing ................................489
Mass Air Flow Sensor..............................................489
Intake Air Temperature Sensor ................................489
Engine Coolant Temperature Sensor ......................489
Throttle Position Sensor ..........................................489
Heated Oxygen Sensor 1 Heater (Front) ................489
Heated Oxygen Sensor 2 Heater (Rear).................489
EGR Volume Control Valve (Where Fitted) .............490
EGR Temperature Sensor (Where Fitted) ...............490
EVAP Canister Purge Volume Control Valve ..........490
IACV-AAC Valve ......................................................490
Injector .....................................................................490
Ignition Coil with Power Transistor ..........................490
Condenser ...............................................................490
Fuel Pump ...............................................................490
Crankshaft Position Sensor (POS) ..........................491
Camshaft Position Sensor (PHASE) .......................491
CONTENTS(Cont'd)
EC-6

GLOW CONTROL SYSTEM.......................................677
Description ...............................................................677
ECM Terminals and Reference Value .....................678
Wiring Diagram ........................................................679
Diagnostic Procedure ..............................................680
EGR VOLUME CONTROL SYSTEM..........................686
Description ...............................................................686
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................687
ECM Terminals and Reference Value .....................687
Wiring Diagram ........................................................688
Diagnostic Procedure ..............................................689
START SIGNAL...........................................................693
Wiring Diagram ........................................................693
Diagnostic Procedure ..............................................694
PARK/NEUTRAL POSITION (PNP) SWITCH
(WHERE FITTED)........................................................696
Description ...............................................................696CONSULT-II Reference Value in Data Monitor
Mode ........................................................................696
ECM Terminals and Reference Value .....................696
Wiring Diagram ........................................................697
Diagnostic Procedure ..............................................698
AIR CONDITIONER CONTROL..................................700
Wiring Diagram ........................................................700
MI & DATA LINK CONNECTORS..............................701
Wiring Diagram ........................................................701
SERVICE DATA AND SPECIFICATIONS (SDS).......702
General Specifications .............................................702
Injection Nozzle .......................................................702
Engine Coolant Temperature Sensor ......................702
Crankshaft Position Sensor (TDC) ..........................702
Glow Plug ................................................................702
Accelerator Position Sensor ....................................702
EGR Volume Control Valve .....................................702
CONTENTS(Cont'd)
EC-9