cooling NISSAN PATROL 2000 Electronic Owner's Guide

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

INSPECTION
1. Check valve seating condition at ordinary temperatures. It
should seat tightly.
2. Check valve opening temperature and maximum valve lift.
Tropical type and
Gulf standard
modelStandard type
and Australia
modelFrigid type
Valve opening tem-
perature ÉC (ÉF)76.5 (170) 82 (180) 88 (190)
Maximum valve lift
mm/ÉC (in/ÉF)10/90 (0.39/194) 10/95 (0.39/203) 10/100 (0.39/212)
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
gasket.
SLC695A
SLC377B
ENGINE COOLING SYSTEMZD
Thermostat (Cont'd)
LC-1012

Radiator
REMOVAL AND INSTALLATION
1. Remove under cover.
2. Drain engine coolant. Refer to MA section, ªChanging Engine
Coolantº.
3. Remove air cleaner case, air duct and resonator.
4. Remove battery (right side).
5. Move window washer tank.
6. Remove radiator shroud (lower).
7. Remove radiator shroud (front).
8. Disconnect radiator hose (upper and lower).
9. Disconnect reservoir tank hose.
10. Disconnect A/T oil cooler hose (Only A/T models).
JLC378B
ENGINE COOLING SYSTEMZD
LC-1013

11. Remove radiator.
12. After repairing or replacing radiator, install all removed parts
in reverse order of removal.
Cooling Fan (Crankshaft driven)
DISASSEMBLY AND INSTALLATION
+Do not release the drive belt tension by removing the fan/
water pump pulley.
+Fan coupling cannot be disassembled and should be
replaced as a unit. If front mark
jFis present, install fan so
that side marked
jFfaces the front.
+Proper alignment of these components is essential. Improper
alignment will cause them to wobble and may eventually
cause the fan to separate from the water pump causing
extensive damage.
JLC379B
ENGINE COOLING SYSTEMZD
Radiator (Cont'd)
LC-1014

Engine Lubrication System
Oil pressure check
Engine speed
rpmApproximate discharge pressure
kPa (bar, kg/cm2, psi)
Idle speed More than 147 (1.47, 1.5, 21)
2,000 More than 539 (5.39, 5.5, 78)
4,000 More than 736 (7.36, 7.5, 107)
Oil pump
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 clear-
ance
V60.040 - 0.097
(0.0016 - 0.0038)
Engine Cooling System
Radiator
Unit: kPa (bar, kg/cm2, psi)
Cap relief pressure78-98
(0.78 - 0.98, 0.8 - 1.0, 11 - 14)
Leakage test pressure 157 (1.57, 1.6, 23)
Thermostat
Tropical type Standard type
Valve opening tem-
perature ÉC (ÉF)76.5 (170) 82 (180)
Valve lift
mm/ÉC (in/ÉF)More than 10/95
(0.39/203)More than 10/95
(0.39/203)
SERVICE DATA AND SPECIFICATIONS (SDS)ZD
LC-1015

MAINTENANCE
SECTION
MA
MODIFICATION NOTICE:
+ The ZD30DDTi engine has been replaced with the RD28ETi engine.
+ Descriptions for the engine coolant mixture ratio have been modified.
CONTENTS
PERIODIC MAINTENANCE ................................ 1002
Maintenance Schedule for Diesel Engines
(Annual Mileage < 30,000 km/year) ................ 1002
Chassis and Body Maintenance ...................... 1003
Maintenance Under Severe Driving Conditions
(Annual Driving Distance < 30,000 km/year)... 1004
Maintenance Schedule for Diesel Engines
(Annual Mileage > 30,000 km/year) ................ 1005
Chassis and Body Maintenance ...................... 1006
Maintenance Under Severe Driving Conditions
(AnnualDrivingDistance>30,000km/year)...1007
RECOMMENDED FLUIDS AND
LUBRICANTS ...................................................... 1008
Fluids and Lubricants....................................... 1008
SAE Viscosity Number..................................... 1009
Engine Coolant Mixture Ratio .......................... 1010
ZD
ENGINE MAINTENANCE .................................... 1011
Checking Tightening Torque............................ 1011 Adjusting Intake and Exhaust Valve
Clearance ......................................................... 1011
Checking Drive Belt ......................................... 1011
Removal ........................................................... 1012
Installation ........................................................ 1012
Changing Engine Oil ........................................ 1012
Changing Engine Oil Filter............................... 1013
Changing Engine Coolant ................................ 1014
Checking Cooling System................................ 1016
Checking and Replacing Fuel Filter and
Draining Water ................................................. 1017
Checking Fuel Lines ........................................ 1018
Cleaning and Replacing Air Cleaner Filter ...... 1019
CHASSIS AND BODY MAINTENANCE ............. 1020
Checking A/T Fluid .......................................... 1020
Changing A/T Fluid .......................................... 1021
SERVICE DATA AND SPECIFICATIONS
(SDS) .................................................................... 1022
Engine Maintenance (ZD) ................................ 1022

MA

The following tables show the normal maintenance schedule. Depending upon weather and atmospheric
conditions, varying road surfaces, individual driving habits and vehicle usage, additional or more frequent
maintenance may be required.
Periodic maintenance beyond the last period shown on the tables requires similar maintenance.
Maintenance Schedule for Diesel Engines
(Annual Mileage < 30,000 km/year)
ZD30DDTi engine
Abbreviations: R = Replace, I = Inspect: Correct or replace if necessary, C = Clean.
MAINTENANCE OPERATIONMAINTENANCE INTERVAL
Perform on a kilometer basis, but on an annual basis
when driving less than 15,000 km (9,000 miles) per
year.km x 1,000 15 30 45 60 75 90
(miles x 1,000) (9) (18) (27) (36) (45) (54)
Months 12 24 36 48 60 72
Engine compartment and under vehicleReference
pages
Engine oil (Use recommended oil)HRRRRRRMA-1012
Engine oil filter (Use Eco filter or equivalent)HSee NOTE (1)RRRRRRMA-1013
Drive beltsIIIIIIMA-1011
Cooling systemIIIIIIMA-1016
Engine anti-freeze coolant (Use genuine NISSAN Anti-
freeze Coolant (L2N) or equivalent)See NOTE (2) IMA-1010,
1014
Air cleaner filterHR MA-1019
Fuel linesI I I MA-1018
Injection nozzles See NOTE (3)*1
Intake & exhaust valve clearance See NOTE (4)MA-1011
Fuel filterHR R MA-1017
NOTE: (1) Oil filter element assembly and O-ring seal are replacement parts.
(2) First replace at 90,000 km (54,000 miles)/60 months, then every 60,000 km (36,000 miles)/48 months. Perform ªIº
(Checking the mixture ratio and correcting the mixture ratio if necessary) at the middle of replacement interval.
(3) If engine power decreases, black exhaust smoke is emitted or engine noise increases, check injection nozzles and,
if necessary, replace injection nozzle assembly.
(4) If valve noise increases, check valve clearance.
HMaintenance items with ªHº should be performed more frequently according to ªMaintenance under severe driv-
ing conditionsº.
*1: ªInjection Tube and Injection Nozzleº in EC section
PERIODIC MAINTENANCE
MA-1002