1998 NISSAN PATROL service

ENGINE LUBRICATION &
COOLING SYSTEMS
SECTION
LC
CONTENTS
PRECAUTIONS AND PREPARATION............................1
Liquid Gasket Application Procedure ..........................1
Special Service Tools ..................................................2
ENGINE LUBRICATION SYSTEM..................................3
Lubrication Circuit ........................................................3
Oil Pressure Check......................................................3
Oil Pump ......................................................................4
Oil Cooler .....................................................................7
Oil Jet...........................................................................7
Turbocharger ...............................................................8
ENGINE COOLING SYSTEM..........................................9
Cooling Circuit .............................................................9System Check..............................................................9
Water Pump ...............................................................10
Thermostat .................................................................12
Radiator .....................................................................14
Re®lling Engine Coolant ............................................14
Cooling Fan (Crankshaft driven) ...............................15
Cooling Fan (Motor driven)........................................15
Radiator (Aluminum type) ..........................................16
Overheating Cause Analysis .....................................20
SERVICE DATA AND SPECIFICATIONS (SDS)..........21
Engine Lubrication System ........................................21
Engine Cooling System .............................................21
LC

Special Service Tools*: Special tool or commercial equivalent
Tool number
Tool nameDescription
ST25051001*
Oil pressure gauge
NT558
Measuring oil pressure
Maximum measuring range:
2,452 kPa (24.5 bar, 25
kg/cm
2, 356 psi)
ST25052000*
Hose
NT559
Adapting oil pressure gauge
to cylinder block
EG17650301
Radiator cap tester
adapter
NT564
Adapting radiator cap tester
to radiator ®ller neck
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
KV99103510
Radiator plate pliers A
NT224
Installing radiator upper and
lower tanks
KV99103520
Radiator plate pliers B
NT225
Removing radiator upper and
lower tanks
WS39930000
Tube presser
NT052
Pressing the tube of liquid gas-
ket
PRECAUTIONS AND PREPARATION
LC-2

Radiator (Aluminum type)
Aluminum radiator can be disassembled by using special proce-
dures and special service tools.
DISASSEMBLY
1. Remove tank with Tool.
+Grip the crimped edge and bend it upwards so that Tool slips
off.
Do not bend excessively.
SLC882AB
SLC903
SLC893
ENGINE COOLING SYSTEM
LC-16

Engine Lubrication System
Oil pressure check
Engine
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed
3,000More than 78 (0.78, 0.8, 11)
318.7 - 424.6
(3.19 - 4.25, 3.25 - 4.33, 46.2 - 61.6)
Oil pumpUnit: mm (in)
Body to outer gear clearance
V10.11 - 0.20 (0.0043 - 0.0079)
Inner gear to crescent
clearance
V20.216 - 0.326 (0.0085 - 0.0128)
Outer gear to crescent
clearance
V30.21 - 0.32 (0.0083 - 0.0126)
Housing to inner gear
clearance
V40.05 - 0.09 (0.0020 - 0.0035)
Housing to outer gear
clearance
V50.05 - 0.11 (0.0020 - 0.0043)
Inner gear to brazed portion
of housing clearance
V60.106 - 0.152 (0.0042 - 0.0060)
Engine Cooling System
Thermostat
Valve opening temperature CÉ (ÉF) 82.0 (180)
Maximum valve lift mm/ÉC (in/ÉF) 10/95 (0.39/203)
RadiatorUnit: kPa (bar, kg/cm2, psi)
Cap relief pressure78-98
(0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Leakage test pressure 157 (1.57, 1.6, 23)
SERVICE DATA AND SPECIFICATIONS (SDS)
LC-21