2002 NISSAN TERRANO Service Repair Manual

NOTES

ENGINE LUBRICATION &
COOLING SYSTEMS
SECTION
LC
CONTENTS
ZD
PRECAUTIONS AND PREPARATION............................2
Liquid Gasket Application Procedure ..........................2
Special Service Tools ..................................................2
ENGINE LUBRICATION SYSTEM..................................3
Lubricating Circuit ........................................................3
Oil Pressure Check......................................................4
Oil Pump ......................................................................5
Oil Jet...........................................................................7
Oil Cooler .....................................................................8
ENGINE COOLING SYSTEM..........................................9
Cooling Circuit .............................................................9
System Check............................................................10
Water Pump ............................................................... 11
Thermostat .................................................................12
Water Outlet ...............................................................13
Radiator .....................................................................14
Cooling Fan (Crankshaft driven) ...............................15
EGR Cooler ...............................................................16
SERVICE DATA AND SPECIFICATIONS (SDS)..........17
Engine Lubrication System ........................................17
Engine Cooling System .............................................17TD27TiPREPARATION..............................................................18
PRECAUTION................................................................19
ENGINE LUBRICATION SYSTEM................................20
Lubrication Circuit ......................................................20
Oil Pressure Check....................................................21
Oil Pump ....................................................................22
Oil Filter Bracket ........................................................24
Oil Cooler ...................................................................25
Oil Jet.........................................................................26
ENGINE COOLING SYSTEM........................................27
Cooling Circuit ...........................................................27
System Inspection .....................................................28
Water Pump ...............................................................29
Thermostat .................................................................31
Radiator .....................................................................32
Cooling Fan ...............................................................33
SERVICE DATA AND SPECIFICATIONS (SDS)..........34
Engine Lubrication System ........................................34
Engine Cooling System .............................................34

Liquid Gasket Application Procedure
a. Use a scraper to remove all traces of old liquid gasket from
mating surfaces and grooves. Also, completely clean any oil
from these areas.
b. Apply a continuous bead of liquid gasket to mating surfaces.
(Use Genuine Liquid Gasket or equivalent.)
IFor oil pan, be sure liquid gasket diameter is 3.5 to 4.5 mm
(0.138 to 0.177 in).
IFor areas except oil pan, be sure liquid gasket diameter is
2.0 to 3.0 mm (0.079 to 0.118 in).
c. Apply liquid gasket around the inner side of bolt holes (unless
otherwise specified).
d. Assembly should be done within 5 minutes after coating.
e. Wait at least 30 minutes before refilling engine oil and engine
coolant.
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 filler neck and reser-
voir tank cap
a: 28 (1.10) dia.
b: 31.4 (1.236) dia.
c: 41.3 (1.626) dia.
Unit: mm (in)
SEM164F
AEM080
PRECAUTIONS AND PREPARATIONZD
LC-2

Lubricating Circuit
SLC361B
ENGINE LUBRICATION SYSTEMZD
LC-3

Oil Pressure Check
WARNING:
IBe careful not to burn yourself, as the engine and oil may
be hot.
IOil pressure check should be done in ªNeutralº gear posi-
tion.
1. Check oil level.
2. Remove oil pressure switch.
3. Install pressure gauge.
4. Start engine and warm it up to normal operating temperature.
5. Check oil pressure with engine running under no-load.
Engine speed
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed
2,000
4,000More than 147 (1.47, 1.5, 21)
More than 539 (5.39, 5.5, 78)
More than 736 (7.36, 7.5, 107)
If difference is extreme, check oil passage and oil pump.
6. Install oil pressure switch with sealant.
Oil pressure switch:
:13-17N×m (1.25 - 1.75 kg-m,9-12ft-lb)
SLC694A
JLC362B
ENGINE LUBRICATION SYSTEMZD
LC-4

Oil Pump
REMOVAL AND INSTALLATION
Refer to ªTIMING GEARº in EM section.
DISASSEMBLY AND ASSEMBLY
IWhen installing oil pump, apply new engine oil to gears.
IWhen installing the inner and outer gear, face mating mark
toward the oil pump cover as shown (left).
JLC363B
JLC364B
ENGINE LUBRICATION SYSTEMZD
LC-5

OIL PUMP INSPECTION
Using a feeler gauge, straightedge and micrometers, check the
following clearances:
Unit: mm (in)
Body to outer gear radial clearanceq10.114 - 0.200
(0.0045 - 0.0079)
Inner gear to outer gear tip clearanceq
2Less than 0.180 (0.0071)
Body to inner gear axial clearanceq
30.05 - 0.09
(0.0020 - 0.0035)
Body to outer gear axial clearanceq
40.050 - 0.105
(0.0020 - 0.0041)
Inner gear to brazed portion of housing
clearanceq
5
0.045 - 0.091
(0.0018 - 0.0036)
Regulator valve to oil pump cover
clearanceq
6
0.040 - 0.097
(0.0016 - 0.0038)
IIf the tip clearance (q2) exceeds the limit, replace gear set.
IIf body to gear clearances (q
1,q3,q4,q5) exceed the limit,
replace oil pump body assembly.
REGULATOR VALVE INSPECTION
1. Visually inspect components for wear and damage.
2. Check oil pressure regulator valve sliding surface and valve
spring.
3. Coat regulator valve with engine oil. Check that it falls smoothly
into the valve hole by its own weight.
If damaged, replace regulator valve set or oil pump cover.
4. Check regulator valve to oil pump cover clearance.
Clearance:
q
6: 0.040 - 0.097 mm (0.0016 - 0.0038 in)
If it exceeds the limit, replace oil pump cover.
JLC365B
JLC366B
JLC367B
SLC369B
ENGINE LUBRICATION SYSTEMZD
Oil Pump (Cont'd)
LC-6

OIL PRESSURE RELIEF VALVE AND BYPASS VALVE
INSPECTION (For oil cooler)
1. Inspect oil pressure relief valve for movement, cracks and
breaks by pushing the ball. If replacement is necessary, remove
valve by prying it out with suitable tool.
Install a new valve in place by tapping it.
2. Check oil pressure relief valve to oil cooler housing clearance.
Clearance:
q
C: 0.032 - 0.068 mm (0.0013 - 0.0027 in)
If it exceeds the limit, replace oil cooler housing.
Oil Jet
INSPECTION (For timing chain)
Make sure that the holes are not clogged. Clean them with a wire
if necessary.
Drive oil jet into place after positioning alignment mark on.
INSPECTION (For piston)
1. Push cut-off valve of oil jet bolt with a clean resin or brass rod
and make sure that cut-off valve moves smoothly with proper
repulsion.
2. Make sure that the oil jet passage is not clogged. Clean with a
wire if necessary.
When installing oil jet, align oil jet's boss with hole on cylin-
der block.
Oil jet:
:30-39N×m (3.0 - 4.0 kg-m, 22 - 28 ft-lb)
SLC371B
SLC385B
FEM124
FEM125
ENGINE LUBRICATION SYSTEMZD
Oil Pump (Cont'd)
LC-7