engine NISSAN TERRANO 2002 Service Repair Manual

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

OIL FILTER
The oil filter is an element type. Refer to ªChanging Oil Filterº in MA
section.
Oil Cooler
REMOVAL AND INSTALLATION
1. Drain engine oil and coolant.
Remove catalyst and turbocharger. Refer to ªCATALYST AND
TURBOCHARGERº in EM section.
2. Remove bolts A to C then remove oil cooler assembly.
IDo not remove ªDº nuts when removing oil cooler assem-
bly.
Bolt length:
A: 20 mm (0.79 in)
B: 45 mm (1.77 in)
C: 65 mm (2.56 in)
3. Installation is in reverse order of removal.
IDo not spill coolant on the drive belt.
INSPECTION
1. Check oil cooler for cracks.
2. Check oil cooler for clogging by blowing through coolant inlet.
If necessary, replace oil cooler assembly.
YLC030
JLC381B
ENGINE LUBRICATION SYSTEMZD
Oil Jet (Cont'd)
LC-8

Cooling Circuit
YLC031
ENGINE COOLING SYSTEMZD
LC-9

System Check
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could occur from high pressure coolant escaping from
the radiator.
Wrap a thick cloth around the cap. Slowly turn it a quarter turn
to allow built-up pressure to escape. Carefully remove the cap
by turning it all the way.
CHECKING COOLING SYSTEM HOSES
Check hoses for the following:
IImproper attachment
ILeaks
ICracks
IDamage
IChafing
IDeterioration
CHECKING COOLING SYSTEM FOR LEAKS
To check for leakage, apply pressure to the cooling system with a
tester.
Testing pressure:
157 kPa (1.57 bar, 1.6 kg/cm
2, 23 psi)
CAUTION:
Higher pressure than specified may cause radiator damage.
CHECKING RADIATOR CAP
To check radiator cap, apply pressure to cap with a tester.
Radiator cap relief pressure:
Standard
78-98kPa
(0.78 - 0.98 bar, 0.8 - 1.0 kg/cm
2, 11 - 14 psi)
Pull the negative pressure valve to open it.
Check that it closes completely when released.
SLC134B
SLC135B
SMA967B
ENGINE COOLING SYSTEMZD
LC-10

Water Pump
CAUTION:
IWhen removing water pump assembly, be careful not to
get coolant on drive belt.
IWater pump cannot be disassembled and should be
replaced as a unit.
IAlways replace with new gasket.
IAfter installing water pump, connect hose and clamp
securely, then check for leaks using radiator cap tester.
Refer to MA section.
REMOVAL AND INSTALLATION
1. Drain coolant from radiator and cylinder block.
Refer to MA section (ªChanging Engine Coolantº, ªENGINE
MAINTENANCEº).
2. Remove radiator upper hose.
3. Remove radiator shroud.
4. Remove cooling fan.
5. Remove drive belt. Refer to MA section, ªChecking Drive Beltº.
6. Remove insulator.
7. Remove vacuum pipe.
8. Remove TDC sensor. Refer to EM section, ªTDC sensor
removal and installationº in ªTIMING GEARº.
9. Remove fan coupling with water pump.
10. Install in the reverse order of removal.
JLC373B
ENGINE COOLING SYSTEMZD
LC-11

INSPECTION
1. Check for badly rusted or corroded body assembly and vane.
2. Check for rough operation due to excessive end play.
CAUTION:
Do not disassemble water pump coupling assembly.
Thermostat
SLC374B
YLC032
ENGINE COOLING SYSTEMZD
Water Pump (Cont'd)
LC-12

REMOVAL AND INSTALLATION
1. Drain engine coolant. Refer to MA section, ªChanging Engine
Coolantº.
2. Remove left side battery. (If so equipped)
3. Remove radiator upper hose.
4. Remove radiator shroud.
5. Remove intake air duct, inlet pipe.
6. Remove harness and connectors.
7. Install in reverse order of removal.
IAfter installation, run engine for a few minutes and check
for leaks.
IBe careful not to spill coolant in engine compartment. Use
a rag to absorb coolant.
INSPECTION
1. Check valve seating condition at ordinary temperatures. It
should seat tightly.
2. Check valve opening temperature and maximum valve lift.
Valve opening temperature ÉC (ÉF) 82 (180)
Maximum valve lift mm/ÉC (in/ÉF) 10/95 (0.39/203)
3. Then check if valve closes at 5ÉC (9ÉF) below valve opening
temperature.
Water Outlet
INSPECTION
Visual inspection for water leaks. If there is leakage, replace gas-
ket.
JLC384B
SLC695A
YLC033
ENGINE COOLING SYSTEMZD
Thermostat (Cont'd)
LC-13