NISSAN PATROL 2000 Electronic Repair Manual

2. Remove intake manifold in the reverse order of that shown
in the figure.
Inspection
Clean surface of intake manifold.
Use a reliable straightedge and feeler gauge to check the flat-
ness of intake manifold surface.
Intake manifold surface flatness:
Limit 0.2 mm (0.008 in)
INSTALLATION
1. Tighten intake manifold in the numerical order shown in the
figure.
:25-28Nzm (2.5 - 2.9 kg-m, 18 - 20 ft-lb)
2. Install in the reverse order of removal.
SEM293G
SEM294G
INTAKE MANIFOLDZD
Removal and Installation (Cont'd)
EM-1013

Removal and Installation
REMOVAL
1. Remove the following parts.
+Undercover
+Under guard
+Engine coolant (drain)
Refer to MA section, ªChanging Engine Coolantº.
+Battery (on left side) (for cold areas)
+Exhaust front tube
Refer to FE section, ªRemoval and Installationº, ªEXHAUST
SYSTEMº.
+Remove wires, harnesses, tubes and pipes.
SEM295G
SEM296G
CATALYST AND TURBOCHARGERZD
EM-1014

2. Remove catalyst.
CAUTION:
Do not disassemble catalyst.
Inspection
TURBOCHARGER
CAUTION:
When the compressor wheel, turbine wheel, or rotor shaft is
damaged, remove all the fragments and foreign matter left in the
following passages in order to prevent a secondary failure:
Suction side: Between turbocharger and intercooler
Exhaust side: Between turbocharger and catalytic
converter
Rotor shaft
+Check that the rotor shaft rotates smoothly without any resis-
tance when it is rotated by your fingertips.
+Check that the rotor shaft is not loose when it is moved ver-
tically or horizontally.
Standard value for rotor shaft oil clearance:
0.086 - 0.177 mm (0.0034 - 0.0070 in)
SEM297G
SEM298G
CATALYST AND TURBOCHARGERZD
Removal and Installation (Cont'd)
EM-1015

Rotor shaft end play
Place a dial gauge at the rotor shaft end in the axial direction to
measure the end play.
Standard: 0.044 - 0.083 mm (0.0017 - 0.0033 in)
Turbine wheel
+Check that there is no oil adhesion.
+Check that there is no carbon accumulation.
+Check that blades of the turbine wheel are not bent or bro-
ken.
+Check that the turbine wheel does not interfere with the tur-
bine housing.
Compressor wheel
+Check that there is no oil adhesion inside the air inlet.
+Check that the compressor wheel does not interfere with the
compressor housing.
+Check that the wheel is not bent or broken.
VNT control actuator
+Connect the handy pump to the actuator, and check that the
rod strokes smoothly in compliance with the following pres-
sure.
+First, apply the inspection negative pressure of about þ66.7
kPa (þ667 mbar, þ500 mmHg, 19.69 inHg), and then mea-
sure the values while reducing the negative pressure to 0.
Standard (Vacuum pressure/rod stroke amount):
þ46.9 1.3 kPa (þ469 13 mbar, þ352 10 mmHg,
þ13.86 0.39 inHg)/0.2 mm (0.008 in)
þ30.8 0.7 kPa (þ308 7 mbar, þ231 5 mmHg,
þ9.09 0.20 inHg)/5.0 mm (0.197 in)
Approximately þ22.7 kPa (þ227 mbar, þ170 mmHg,
þ6.69 inHg)/Rod stroke end
SEM299G
SEM300G
SEM310G
SEM311G
CATALYST AND TURBOCHARGERZD
Inspection (Cont'd)
EM-1016

Trouble diagnosis of turbocharger
Preliminary check:
Check that the VNT control valve system has no malfunction.
Refer to EC section, ªECM Terminals and Reference Valueº in
ªTROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONº.
+Check that the engine oil level is between MIN and MAX of
the dipstick. (When the engine oil amount is more than MAX,
the oil flows into the inlet duct through the blow-by gas
passage, and the turbocharger is misjudged failure.)
+Ask the customer if he/she always runs the vehicle in idle
engine speed to cool the oil down after driving.
+Replace the turbocharger assembly when any malfunction is
found after unit inspections specified in the table below.
+If no malfunction is found after the unit inspections, judge that
the turbocharger body has no failure. Check the other parts
again.
Inspection item Inspection resultSymptom (when each inspection item
meets each inspection result)
Oil leak-
ageSmoke NoiseInsuffi-
cient
power/
accel-
eration
failure
Turbine wheelOil leaks.n
nn
Carbon is accumulated.n
jj
Friction with housing.nj
j
Blades are bent or broken.
Compressor wheelInside the air inlet is seriously contami-
nated by oil.jj
Friction with housing.njj
Blades are bent or broken.
After checking both turbine and compressor,
inspect rotor shaft end play.There is resistance when the rotor shaft
is rotated by your fingertips.nnj
The rotor shaft sometimes does not
rotate by your fingertips.
There is too much play in the bearing.nnjn
Oil return portCarbon or sludge is accumulated in the
waste oil hole.n
nn
Operation of VNT control actuator+The actuator does not operate
smoothly when vacuum pressure is
gradually applied.
+Stroke amount is not in compliance
with the vacuum pressure.j
: Large possibility
j: Medium possibility
n: Small possibility
INSTALLATION
1. Install catalyst.
:29-39Nzm (2.9 - 3.3 kg-m, 21 - 23 ft-lb)
Place the protruding area of the gasket between the turbo-
charger and the exhaust outlet upwards, and install the lipped
side to the turbocharger side. Refer to the figure, EM-1014.
2. Install in the reverse order of removal.
CATALYST AND TURBOCHARGERZD
Inspection (Cont'd)
EM-1017

Removal and Installation
REMOVAL
1. Remove the following parts.
+Refer to ªPREPARATIVE WORKº in ªCATALYST AND
TURBOCHARGERº, EM-1014.
+Remove catalytic converter.
+Remove turbocharger.
2. Loosen nuts holding the exhaust manifold in the reverse
order of that shown in the figure.
SEM312G
SEM313G
EXHAUST MANIFOLDZD
EM-1018

Inspection
EXHAUST MANIFOLD
Check distortion on mounting surface with straightedge and
feeler gauge.
Limit: 0.2 mm (0.008 in)
INSTALLATION
1. Tighten exhaust manifold holding nuts in the numerical order
shown in the figure.
:40-44Nzm (4.0 - 4.5 kg-m, 29 - 32 ft-lb)
NOTE:
Install gasket so that the protruding tab (mark for correct
installation) is positioned on the side of No. 1 port (front
side). Refer to component structure diagram on the previ-
ous page.
2. Install in the reverse order of removal.
FEM034
EXHAUST MANIFOLDZD
EM-1019

Removal and Installation
REMOVAL
1. Remove the following parts.
+Engine cover
+Intercooler
+Air inlet pipe
+Throttle body
+Wires, harnesses, tubes and pipes
2. Loosen holding bolts in the reverse order of that shown in the
figure and remove.
3. Remove rocker cover to the direction of glow plug tilt.
4. Remove glow plug oil seals.
SEM315G
SEM316G
ROCKER COVERZD
EM-1020

INSTALLATION
1. Temporarily tighten holding bolts in the numerical order
shown in the figure.
2. Apply Three Bond 1207C (KP510 00150) to the area shown
in the figure.
3. Use a scraper to remove old liquid gasket.
4. Apply once more.
5. Apply engine oil to glow plug oil seals and install them.
6. Tighten holding bolts in the numerical order shown in the
figure.
7. Re-tighten to the same torque in the same order as above.
8. Install in the reverse order of removal.
SEM317G
FEM001
SEM316G
ROCKER COVERZD
Removal and Installation (Cont'd)
EM-1021

Removal and Installation
REMOVAL [OIL PAN (LOWER)]
1. Remove the following parts.
+Remove undercover.
+Extract the engine oil.
2. Loosen the installation bolts in the reverse order of that
shown in the figure and then remove.
3. Using a seal cutter (SST), cut the liquid gasket to separate
it.
SEM319G
SEM341G
OIL PAN & OIL STRAINERZD
EM-1022