2002 NISSAN TERRANO Service Repair Manual

VALVE STEM OIL SEAL
1. Remove rocker cover.
2. Remove rocker shaft assembly.
3. Remove valve spring.
Piston concerned should be set at TDC to prevent valve from
falling.
4. Remove valve oil seals.
5. Apply engine oil to valve oil seal and install it in place.
SEM645B
SEM626B
SEM646B
SEM223B
OIL SEAL REPLACEMENTTD27Ti
EM-117

OIL SEAL INSTALLING DIRECTION
IWhen installing a new front or rear oil seal, make sure its
mounting direction is correct.
CRANKSHAFT FRONT OIL SEAL
1. Remove protecting cover.
2. Remove radiator shroud.
3. Remove cooling fan.
4. Remove drive belts.
5. Remove crank pulley.
6. Remove crankshaft oil seal.
IBe careful not to damage sealing surfaces of crankshaft.
7. Coat new oil seal with engine oil and install it in place.
CRANKSHAFT REAR OIL SEAL
1. Dismount transmission.
2. Remove clutch cover assembly.
3. Remove flywheel and rear plate.
4. Remove oil seal retainer assembly, then remove oil seal.
IBe careful not to damage sealing surfaces of crankshaft.
5. Coat new oil seal with engine oil and install it in place.
SEM715A
SEM644B
SEM217B
OIL SEAL REPLACEMENTTD27Ti
EM-118

Removal and Installation
Turbocharger should not be disassembled.
1. Drain engine coolant.
2. Remove the following:
IAir duct and intercooler components
IHeat shield plates
IExhaust front tube
IOil tubes
IWater tubes
3. Remove turbocharger from exhaust manifold.
4. Remove turbocharger bracket bolts.
Inspection
Condition 1: Low engine power
Probable cause Corrective action
Air leak at the connection of compressor housing and suc-
tion hose/inlet tube, or inlet and intake manifold.
ECorrect the connection.
Exhaust gas leak at the connection of turbine housing and
exhaust manifold, connecting tube or exhaust outlet.
ECorrect the connection or replace gasket.
By-pass valve is stuck in open position.E
Replace turbocharger assembly.
Stuck or worn journal or bearing.E
Broken shaft.E
Sludge on back of turbine wheel.E
Broken turbine wheel.E
Condition 2: Excessively high engine power
Probable cause Corrective action
Disconnected or cracked rubber hose of by-pass valve
controller.
ECorrect or replace rubber hose.
By-pass valve is stuck in closed position.E
Replace turbocharger assembly.
Controller diaphragm is broken.E
TURBOCHARGERTD27Ti
EM-119

Condition 3: Excessively high oil consumption, or exhaust shows pale blue smoke
Probable cause Corrective action
Oil leak at the connection of lubricating oil passage.
ECorrect the connection.
Oil leak at oil seal of turbine.E
Replace turbocharger assembly.Oil leak at oil seal of compressor.E
Worn journal or bearing.E
Perform the following checks. If NG, replace turbocharger unit.
OIL AND WATER TUBES
Check tubes for clogging.
NEM180
SEM029F
TURBOCHARGERTD27Ti
Inspection (Cont'd)
EM-120

ROTOR SHAFT
1. Check rotor shaft for smooth rotation.
2. Check rotor shaft for carbon deposits.
3. Measure rotor shaft runout.
Runout (Total indicator reading):
Standard
0.056 - 0.127 mm (0.0022 - 0.0050 in)
4. Measure rotor shaft end play.
End play:
Standard
0.013 - 0.097 mm (0.0005 - 0.0038 in)
IDo not allow wheels to turn when axial play is being mea-
sured.
SEM030F
SEM031F
SEM032F
SEM827D
TURBOCHARGERTD27Ti
Inspection (Cont'd)
EM-121

TURBINE WHEEL
Check turbine wheel for the following.
IOil
ICarbon deposits
IDeformed fins
IContact with turbine housing
COMPRESSOR WHEEL
Check compressor wheel for the following.
IOil
IDeformed fins
IContact with compressor housing
WASTEGATE VALVE
Remove rod pin and check wastegate valve for cracks, deformation
and smooth movement. Check valve seat surface for smoothness.
Check operation of by-pass valve controller.
IMove by-pass valve to make sure that it is not sticking or
scratched.
IMeasure rod end play of the by-pass valve controller.
Do not apply more than 102.6 kPa (1,026 mbar, 770 mmHg,
30.31 inHg) pressure to controller diaphragm.
By-pass valve controller stroke/pressure:
0.38 mm (0.015 in)/92 kPa (920 mbar, 690 mmHg,
27.17 inHg)
SEM828D
SEM829D
SEM830D
SEC727B
TURBOCHARGERTD27Ti
Inspection (Cont'd)
EM-122

EEM097E
ENGINE REMOVALTD27Ti
EM-123

WARNING:
a. Situate vehicle on a flat and solid surface.
b. Place chocks at front and back of rear wheels.
c. Do not remove engine until exhaust system has completely
cooled off.
d. For safety during subsequent steps, the tension of wires
should be slackened against the engine.
e. Be sure to hoist engine in a safe manner.
f. For engines not equipped with engine slingers, attach
proper slingers and bolts described in PARTS CATALOG.
CAUTION:
IWhen lifting engine, be careful not to strike adjacent parts,
especially, brake lines and brake master cylinder.
IIn hoisting the engine, always use engine slingers in a safe
manner.
ENGINE REMOVALTD27Ti
EM-124