Page 461 of 1574
1D1-10 M162 ENGINE COOLING THERMOSTAT
Removal & Installation Procedure
1. Drain the coolant from the radiator.
2. Loosen the hose mounting clamp (6) and remove the heaterhose (7).
3. Unscrew the three bolts (5) and remove the thermostat cover bracket, thermostat cover and the thermostat in order. Installation Notice
1 Thermostat Cover
2 Thermostat
3 O-ring
4 Thermostat Cover Bracket
5 Bolt (M6 X 25, 3 pieces)
.........................9-11 Nm
6 Hose Mounting Clamp
7 Heater Hose
Do not separate the thermostat cover and thermostat.
4. Replace the O-ring if necessary.
5. Check the leakage in the cooling system.
Tightening Torque 9 - 11 Nm
Page 465 of 1574
1D1-14 M162 ENGINE COOLING COOLING FAN SHROUD
Removal & Installation Procedure1. Pull out the 2 clips (1) from the fan shroud assembly.
2. Remove the lower fan shroud (2). NoticeFor installation, exactly align the lower fan shroud pin into the hole of the fan shroud assembly (4) and insert theclips.
3. Remove the bolts (3) and then remove the cooling fan shroud assembly (4).
1 Clip
2 Lower Fan Shroud
3 Bolt
Installation Notice
4. Installation should follow the removal procedure in the reverse order.
Tightening Torque 7 Nm 4 Fan Shroud Assembly
5 Radiator
Page 466 of 1574
M162 ENGINE COOLING 1D1-15
RADIATOR Preceding Work : Removal of cooling fan shroud
1 Radiator Inlet Coolant Hose
2 Radiator Outlet Coolant Hose
3 Make Up Coolant Hose
4 Automatic Transmission Oil Cooling Hose
5 Automatic Transmission Oil Cooling Line 6 Bolt
7 Insulator
8 Stopper
9 Bolt
............................................................. 7 Nm
10 Radiator
Page 467 of 1574
1D1-16 M162 ENGINE COOLING Removal & Installation Procedure1. Drain coolant from the radiator.
2. Remove the coolant thermo connector from the radiator.
3. Remove the each coolant hoses.
Tightening Torque 14 Nm
4. Remove the automatic transmission oil cooling hose.
Installation Notice
5. Remove the automatic transmission oil cooling line bolts and then remove the oil cooling line.
6. Remove the radiator upper mounting bolts and then remove the bracket and insulator.
7. Remove the radiator.
8. Check the radiator pin for crack, damage, leakage and bending and replace if necessary.
9. Installation should follow the removal procedure in the reverse order.
10. Do cooling system leakage test.
Page 468 of 1574

Circulation Type RadiationCapabilitySECTION 1D2
M161 ENGINE COOLING
Specifications . . . . . . . . . . . . . . . . . . . . . . . 1D2-1
General Specifications . . . . . . . . . . . . . . . . . 1D2-1
Fastener Tightening Specifications . . . . . . . . 1D2-2
Special Tools . . . . . . . . . . . . . . . . . . . . . . . 1D2-3
Special Tools Table . . . . . . . . . . . . . . . . . . . . 1D2-3
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . 1D2-4 System Leakage Test . . . . . . . . . . . . . . . . . . 1D2-4
Maintenance and Repair . . . . . . . . . . . . . . 1D2-5
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . 1D2-5Coolant Drain and Fill Up . . . . . . . . . . . . . . .
1D2-5
Cooling Fan and Viscous Clutch . . . . . . . . . . 1D2-7
Coolant Pump . . . . . . . . . . . . . . . . . . . . . . . . 1D2-9
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . 1D2-11
Thermostat Housing Assembly . . . . . . . . . . 1D2-12
Removal and Installation of Cooling Fan Shroud . . . . . . . . . . . . . . . . . . . . . . . 1D2-14
Removal and Installation of Radiator . . . . . 1D2-15
SPECIFICATIONS
GENERAL SPECIFICATIONS
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwisenoted.
TABLE OF CONTENTS
Description
Water Cooling Forced Circulation Down Flow
61,500 kcal/h 58,000 kcal/h
680 x 415 x 25 mm680 x 415 x 28 mm
460, 9 Blades
ALUTEC-P78, Dragon Power Coolant A 50 : 5010.5 L 3.4 L
1.4 bar
Application
Cooling TypeRadiator Dimension(Width ×Height ×Thickeness)
Cooling Fan Anti-Freeze Agent
Mixing Ratio of Anti-Freeze Agen with Water (Anti-Freeze Agent : Water) Coolant Capacity Reservoir Capacity
Cap Operating Pressure (Reservoir Tank Pressure Cap)
Page 472 of 1574
M161 ENGINE COOLING 1D2-5
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
COOLANT DRAIN AND FILL UP Draning & Filling up Procedure 1. Loosen the cap a little and release pressure and remove the cap. NoticeFor the risk of scalding, the cap must not be opened unless the coolant temperature is below 90oC.
2. Loosen the radiator lower drain cock and drain the coolant.
Notice
Collect coolant by using a proper container.
3. Drain the coolant from the crankcase by inserting a hose(dia. 14mm) onto the drain bolt on the side of crankcase (exhaust manifold) and by loosening the plug. Notice
Just loosen the drain plug to drain the coolant and do
not remove the plug completely.
Collect coolant by using proper container.
Page 473 of 1574
1D2-6 M161 ENGINE COOLING
4. After complete draining of the coolant, remove the hoseconnector to drain plug and reinstall the drain plug. Installation Notice
5. Tighten the radiator lower drain cock.
6. Remove the de-aeration hose clamp in the coolant pumpand remove the de-aeration hose.
7. Fill up the coolant through the coolant reservoir tank. Notice
Match the anti-freeze and the water ratio to 50 : 50.
Supplement the coolant until the coolant overflows to the deaeration hose.
Tightening Torque 30 Nm
8. Insert the de-aeration hose and completely tighten the clamp.
9. Check the coolant level in the coolant reservoir tank.
10. Warm up(until thermostat is opened) the engine and recheck the coolant level in the reservoir tank and fill up
the coolant if necessary.
Page 478 of 1574
M161 ENGINE COOLING 1D2-11
THERMOSTAT
Removal & Installation Procedure
1. Drain the coolant from the radiator.
2. Loosen the hose mounting clip and remove the coolant hose (3, 4).
3. Unscrew the three bolts (1) and remove the thermostat cover assembly from thermostat housing.Installation Notice Do not separate the thermostat cover and thermostat.
4. Replace the O-ring if necessary.
5. Check the leakage in the cooling system.
Tightening Torque 9 - 11 Nm
1 Bolt (M6 X 25, 3 pieces)
........................ 9 -11 Nm
2 Thermostat Cover
3 De-aeration Hose 4 Coolant Outlet Hose
5 Thermostat
6 O-ring