2000 NISSAN PATROL engine

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.
+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

INSTALLATION [OIL PAN (LOWER)]
1. Install oil pan (Lower).
a. Use a scraper to remove all traces of liquid gasket from
mating surfaces.
+Also remove traces of liquid gasket from mating surface of oil
pan (Upper).
+Remove old liquid gasket from the bolt hole and thread.
b. Apply a continuous bead of liquid gasket to mating surface
of oil pan (Lower).
+Use Genuine Liquid Gasket or equivalent.
+Apply liquid gasket to the groove on the mating surface.
+Allow 7 mm (0.28 in) clearance around bolt holes.
c. Apply liquid gasket to inner sealing surface as shown in fig-
ure.
+Be sure liquid gasket is 3.5 to 4.5 mm (0.138 to 0.177 in).
+Attaching should be done within 5 minutes after coating.
2. Tighten the installation bolts in the order shown in the figure.
3. Install in the reverse order of removal.
REMOVAL [OIL PAN (UPPER) AND OIL STRAINER]
1. Remove the following parts.
+Engine cover
+Under covers
+Stabilizer; Refer to FA section in original Service Manual.
+Exhaust front tube and its bracket; Refer to FE section in
original Service Manual.
+Front propeller shaft and rear propeller shaft; Refer to PD
section in original Service Manual.
+Starter motor; Refer to EL section in original Service Manual.
+A/T or M/T assembly with transfer; Refer to AT section or MT
section in original Service Manual.
NOTE:
As there is a converter/clutch housing side oil pan (upper)
installation bolt as well, the transmission will also need to
be removed.
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.
4. Remove oil strainer
INSTALLATION [OIL PAN (UPPER) AND OIL STRAINER]
1. Clean oil strainer if any object is attached, and install oil
strainer.
2. Install oil pan (Upper).
a. Use a scraper to remove all traces of liquid gasket from
mating surfaces.
+Also remove traces of liquid gasket from mating surface of
cylinder block, front cover and oil pan (Lower).
+Remove old liquid gasket from the bolt hole and thread.
b. Apply a continuous bead of liquid gasket to mating surface
of oil pan (Upper).
SEM159F
SEM345GA
SEM346G
SEM159F
SEM347GA
OIL PAN & OIL STRAINERZD
Removal and Installation (Cont'd)
EM-1023

Removal and Installation
REMOVAL
1. Remove the following parts.
+Radiator under side
+Radiator shroud
+Cooling fan
+Chain cover front side
+A/T cooler hose (Disconnect)
+Vacuum hose
+Intercooler cover (When removing vacuum tank)
2. Remove the installation bolts and pull the vacuum pump from
the engine front directly.
3. If it is difficult to remove from the spline shaft connection, tap
lightly with a plastic hammer.
SEM320G
SEM321G
VACUUM PUMPZD
EM-1025

INSPECTION
1. Remove the vacuum hose. Connect the vacuum gauge
through the 3-way connector. Otherwise, remove the welch
valve of the vacuum pipe and attach the vacuum gauge
directly. (The illustration shows the second method.)
+Remove an appropriate part to measure the vacuum pump
load pressure directly and install the vacuum gauge. Refer to
the figure.
2. Start the engine, and measure the load pressure with the
engine idling.
Vacuum pressure:
Standard
þ93.3 to þ101.3 kPa (þ933 to þ1,013 mbar, þ700 to
þ760 mmHg, þ27.56 to þ29.92 inHg)
3. If outside the standard value, make sure that there is no
intake of air within the circuit and measure again.
4. Replace the vacuum pump if still outside the standard value.
INSTALLATION
+Install in the reverse order of removal.
SEM322G
VACUUM PUMPZD
Removal and Installation (Cont'd)
EM-1026

Removal and Installation
CAUTION:
As the internal mechanism of the idler gear must first of all,
and always, be set by a bolt when removing the timing chain
before removing the fuel injection pump and timing gear,
follow the procedures on EM-1039, ªRemoval of timing
chain after setting idler gearº, ªElectronic controlled fuel
injection pumpº.
+This chapter will deal with the summary of removing the tim-
ing chain before removing the camshaft and cylinder head.
Removal
1. Remove the following parts.
+Engine cover
+Intercooler
+Air inlet pipe
+Throttle body
+Rocker cover
+Spill tube
+Coolant (Drain)
+Radiator upper hose
+Water outlet
+Radiator shroud
+Cooling fan
+Auxilary belt
FEM003
TIMING CHAINZD
EM-1027