2000 MITSUBISHI MONTERO service

ENGINE COOLING -General Information/
Service Specifications/Lubricant/Sealant14-2
GENERAL INFORMATION
The cooling system is designed to keep every part
of the engine at appropriate temperature in
whatever condition the engine may be operated.
The cooling method is of the water-cooled, pressure
forced circulation type in which the water pump
pressurizes coolant and circulates it throughout the
engine. If the coolant temperature exceeds the
prescribed temperature, the thermostat opens to
circulate the coolant through the radiator as well
so that the heat absorbed by the coolant may be
radiated into the air.The water pump is of the centrifugal type and is
driven by the drive belt from the crankshaft.
The radiator is the corrugated fin, down flow type.
ItemsSpecifications
RadiatorPerformance kJ/h6G7203,023
4D5, 4M4232,326
SERVICE SPECIFICATIONS
ItemsStandard valueLimit
High pressure valve opening pressure of radiator cap kPa74 - 10364
Range of coolant antifreeze concentration of radiator %30 - 60-
ThermostatValve opening temper-6G788±
2.0-
ature of thermostat_
C4D582±
1.5-
4M476.5±
2.0-
Full-opening tempera-6G7100-
ture of thermostat_
C4D595-
4M490-
Valve lift mm6G710 or more-
4D5, 4M48.5 or more-
LUBRICANT
ItemApplicable modelAmount (including
condense tank) L
MITSUBISHI GENUINE COOLANT or equivalentVehicles without rear heater9.0
Vehicles with rear heater10.5
SEALANT
ItemsSpecified sealantRemarks
Cylinder block drain plug3M Nut Locking Part No. 4171 or equivalentDrying sealant


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

ENGINE COOLING -General14-2
GENERAL
OUTLINE OF CHANGES
Some service procedures have been established as the following changes have been made due to the
compliance with the Emission Regulation Step III.
DThe turbocharger has been changed to a Variable Geometry (VG) type. Due to this change, an
EGR cooler has been added and section ”Water hose and water pipe” has been changed. <4D5>
DThe section ”Water hose and water pipe” has been changed due to the addition of the EGR cooler.
<4M4>


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

15-1
INTAKE AND
EXHAUST
CONTENTS
SERVICE SPECIFICATIONS 2.................
SEALANT 2..................................
SPECIAL TOOL 2............................
ON-VEHICLE SERVICE 2.....................
Intake Manifold Vacuum Check <6G7> 2.........
Turbocharger Supercharging Check <4D5> 2.....
Waste Gate Actuator Check <4D5> 3..........
Waste Gate Actuator Check <4M4> 3..........
AIR CLEANER 4.............................
INTERCOOLER<4D5, 4M4> 5.................
INTAKE MANIFOLD <6G7> 6.................
INTAKE MANIFOLD AND THROTTLE BODY
<4M4> 8.....................................EXHAUST MANIFOLD <6G7> 11..............
INTAKE MANIFOLD AND EXHAUST
MANIFOLD, TURBOCHARGER <4D5> 12...
TURBOCHARGER AND EXHAUST
MANIFOLD <4M4> 14.....................
TURBOCHARGER <4D5> 16.................
TURBOCHARGER <4M4> 19.................
EXHAUST PIPE AND MAIN MUFFLER
<6G7> 21...................................
EXHAUST PIPE AND MAIN MUFFLER
<4D5> 23...................................
EXHAUST PIPE AND MAIN MUFFLER
<4M4> 25...................................


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

INTAKE AND EXHAUST -Intake and Exhaust Manifold,
Turbocharger <4D5>15-13
INSTALLATION SERVICE POINT
"
AA
TURBOCHARGER ASSEMBLY INSTALLATION
1. Check the internal surface, the eye bolt and the
mating surface of the oil pipe and water pipe for
clogging, and clean if necessary.
2. If deposits of carbon are accumulated on the
turbocharger oil passage, remove them and clean
using the compressed air.
Caution
Be careful not to allow foreign material to enter the
turbocharger.
3. Add clean engine oil through the oil feed pipe port
on the turbocharger.
INSPECTION
TURBOCHARGER ASSEMBLY CHECK
DVisually check the turbine wheel and the compressor
wheel for cracking or other damage.
DCheck whether the turbine wheel and the compressor
wheel can be easily turned by hand.
DCheck for oil leakage from the turbocharger assembly.
DCheck whether or not the waste gate valve remains open.
If any problem is found, replace the part after disassembly.
OIL PIPE AND OIL RETURN PIPE CHECK
Check the oil pipe and oil return pipe for clogging, bending,
or other damage. If there is clogging, clean it.
EXHAUST MANIFOLD CHECK
Damage or cracking of any part.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

INTAKE AND EXHAUST -Turbocharger and Exhaust
Manifold <4M4>15-15
INSTALLATION SERVICE POINT
"
AA
TURBOCHARGER ASSEMBLY INSTALLATION
1. Check the internal surface, the eye bolt and the
mating surface of the oil pipe and water pipe for
clogging, and clean if necessary.
2. If deposits of carbon are accumulated on the
turbocharger oil passage, remove them and clean
using the compressed air.
Caution
Be careful not to allow foreign material to enter the
turbocharger.
3. Add clean engine oil through the oil feed pipe port
on the turbocharger.
INSPECTION
Check the following points; replace the part if a problem is
found.
EXHAUST MANIFOLD CHECK
1. Check for damage or cracking of any part.
2. Using a straight edge and a thickness gauge, check for
distortion of the cylinder head installation surface.
Standard value: 0.15 mm or less
Limit: 0.20 mm
TURBOCHARGER ASSEMBLY CHECK
DVisually check the turbine wheel and the compressor
wheel for cracking or other damage.
DCheck whether the turbine wheel and the compressor
wheel can be easily turned by hand.
DCheck for oil leakage from the turbocharger assembly.
DCheck whether or not the waste gate valve remains open.
If any problem is found, replace the part after disassembly.
OIL PIPE AND OIL RETURN PIPE CHECK
Check the oil pipe and oil return pipe for clogging, bending,
or other damage. If there is clogging, clean it.
EXHAUST MANIFOLD CHECK
Damage or cracking of any part.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

15-1
INTAKE AND
EXHAUST
CONTENTS
GENERAL 2.................................
Outline of Changes 2...........................
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 3.................
SEALANT 3..................................
ON-VEHICLE SERVICE 4.....................
Turbocharger Supercharging Check 4............
Supercharging Pressure Control
System Check 5...............................
Variable Geometry Actuator Check 6.............Variable Geometry Solenoid Valve Check 6.......
INTAKE MANIFOLD AND THROTTLE BODY
<4M4> 7.....................................
INTAKE MANIFOLD AND EXHAUST
MANIFOLD, THROTTLE BODY AND
TURBOCHARGER <4D5> 10..................
TURBOCHARGER AND EXHAUST
MANIFOLD <4M4> 12........................
EXHAUST PIPE AND MAIN MUFFLER
<4D5> 14....................................


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

INTAKE AND EXHAUST -General Information/Service Specifications/Sealant15-3
At starting and driving at low speed, the duty control
value of the variable geometry solenoid valve is
increased to apply the vacuum pressure of the
vacuum pump to the variable geometry actuator.
Applying the vacuum pressure to the variable
geometry actuator pulls the actuator rod so that
it can move towards the direction of closing the
variable nozzle of the variable geometry
turbocharger. As closing the nozzle reduces the
exhaust gas mass, the speed of exhaust gas flow
will be increased and efficiency will be improved.
Since the characteristic of boost pressure becomes
a low speed type, boost pressure will suddenly
rise from low speed.
At driving at high speed, the duty control value
of the variable geometry solenoid valve is
decreased to reduce the vacuum pressure from
the vacuum pump so that the actuator rod can
return to the deactivated status and move towards
the direction of opening the nozzle of the variable
geometry turbocharger.Opening the nozzle allows the characteristic of
boost pressure to become a high speed type so
that the appropriate boost pressure can be
maintained.
Therefore, boost pressure can be controlled by
appropriate duty control of the variable geometry
solenoid valve. The engine-ECU calculates the
correct boost pressure based on the engine speed
and fuel injection amount. Furthermore, the duty
control of the variable geometry solenoid valve is
given feedback of the signals from the variable
geometry control pressure sensor and the boost
pressure sensor so that the variable nozzle opening
angle of the variable geometry turbocharger can
be quickly adjusted to obtain the desired boost
pressure.
SERVICE SPECIFICATIONS
ItemsStandard value
Variable geometry actuator activation vacuum
(Approximately 1 mm stroke) kPaApproximately 10.5 - 12.5
Variable geometry solenoid valve coil resistance
(at 20°C)Ω29 - 35
SEALANT
ItemSpecified sealantRemarks
Thread of the intake manifold mounting
bolts3M Stud Locking No.4170 or equivalentAnaerobic sealant


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk

INTAKE AND EXHAUST -Turbocharger and Exhaust
Manifold <4M4>15-13
INSTALLATION SERVICE POINT
"AATURBOCHARGER ASSEMBLY INSTALLATION
1. Check the internal surface, the eye bolt and the
mating surface of the oil pipe and water pipe for
clogging, and clean if necessary.
2. If deposits of carbon are accumulated on the
turbocharger oil passage, remove them and clean
using the compressed air.
Caution
Be careful not to allow foreign material to enter the
turbocharger.
3. Add clean engine oil through the oil feed pipe port
on the turbocharger.


www.WorkshopManuals.co.uk


Purchased from www.WorkshopManuals.co.uk