engine NISSAN PATROL 2000 Electronic Repair Manual

Lubricating Circuit
SLC361B
ENGINE LUBRICATION SYSTEMZD
LC-1002

Oil Pressure Check
WARNING:
+Be careful not to burn yourself, as the engine and oil
may be hot.
+Oil pressure check should be done in ªNeutralº gear
position.
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:
:13-17Nzm (1.25 - 1.75 kg-m,9-12ft-lb)
SLC694A
JLC362B
ENGINE LUBRICATION SYSTEMZD
LC-1003

Oil Pump
REMOVAL AND INSTALLATION
Refer to ªTIMING GEARº in EM section.
DISASSEMBLY AND ASSEMBLY
+When installing oil pump, apply new engine oil to gears.
+When installing the inner and outer gear, face mating
mark toward the oil pump cover as shown (left).
JLC363B
JLC364B
ENGINE LUBRICATION SYSTEMZD
LC-1004

OIL PUMP INSPECTION
Using a feeler gauge, straightedge and micrometers, check the
following clearances:
Unit: mm (in)
Body to outer gear radial clearanceV10.114 - 0.200
(0.0045 - 0.0079)
Inner gear to outer gear tip clearance
V2Less than 0.180 (0.0071)
Body to inner gear axial clearance
V30.05 - 0.09
(0.0020 - 0.0035)
Body to outer gear axial clearance
V40.050 - 0.105
(0.0020 - 0.0041)
Inner gear to brazed portion of housing
clearance
V50.045 - 0.091
(0.0018 - 0.0036)
Regulator valve to oil pump cover
clearance
V60.040 - 0.097
(0.0016 - 0.0038)
+If the tip clearance (V2) exceeds the limit, replace gear
set.
+If body to gear clearances (
V1,V3,V4,V5) 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:
V6: 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-1005

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 clear-
ance.
Clearance:
VC: 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 cyl-
inder block.
Oil jet:
:30-39Nzm (3.0 - 4.0 kg-m, 22 - 28 ft-lb)
SLC371B
SLC385B
FEM124
FEM125
ENGINE LUBRICATION SYSTEMZD
Oil Pump (Cont'd)
LC-1006

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.
+Do not remove ªDº nuts when removing oil cooler
assembly.
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.
+Do 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.
JLC370B
JLC381B
ENGINE LUBRICATION SYSTEMZD
Oil Jet (Cont'd)
LC-1007

Cooling Circuit
JLC372B
ENGINE COOLING SYSTEMZD
LC-1008

System Check
WARNING:
Never remove the radiator cap when the engine is hot. Seri-
ous 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:
+Improper attachment
+Leaks
+Cracks
+Damage
+Chafing
+Deterioration
CHECKING COOLING SYSTEM FOR LEAKS
To check for leakage, apply pressure to the cooling system with
a tester.
Testing pressure:
98 kPa (0.98 bar, 1.0 kg/cm
2, 14 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
59-98kPa
(0.59 - 0.98 bar, 0.6 - 1.0 kg/cm
2,9-14psi)
Pull the negative pressure valve to open it.
Check that it closes completely when released.
SLC134B
SLC135B
SMA967B
ENGINE COOLING SYSTEMZD
LC-1009

Water Pump
CAUTION:
+When removing water pump assembly, be careful not to
get coolant on drive belt.
+Water pump cannot be disassembled and should be
replaced as a unit.
+Always replace with new gasket.
+After 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 TDC sensor removal and
installation in ªTIMING GEARº.
9. Remove fan coupling with water pump.
10. Install in the reverse order of removal.
JLC373B
ENGINE COOLING SYSTEMZD
LC-1010

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
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.
+After installation, run engine for a few minutes and
check for leaks.
+Be careful not to spill coolant in engine compartment.
Use a rag to absorb coolant.
SLC374B
JLC380B
JLC384B
ENGINE COOLING SYSTEMZD
Water Pump (Cont'd)
LC-1011