Page 513 of 1463
1D2-8 M161 ENGINE COOLING
Tools Required
111 589 02 01 00 Open End Wrench
111 589 00 40 00 Open End Wrench
Removal & Installation Procedure
1. Install the holder (special tool : 111 589 00 40 00) to the bolt
at the pulley as shown in the right figure to hold the pulley.
2. Remove the viscous clutch using an open end wrench
(special tool : 111 589 02 01 00).
Installation Notice
Notice
The union nut is left threaded screw.
3. Remove the 3 bolts (1) from the viscous clutch and remove
the cooling fan and the viscous clutch.
Installation Notice
Tightening Torque 40.5 - 49.5 Nm
Tightening Torque 9 - 11 Nm
Notice
You may change the procedure (2) and (3) if necessary.
4. Installation should follow the removal procedure in the
reverse order.
Page 514 of 1463
M161 ENGINE COOLING 1D2-9
COOLANT PUMP
Preceding Work : Removal of viscous clutch
1 Bolt (M6 X 45, 1 piece)........................... 9-11 Nm
2 Bolt (M6 X 95, 1 piece)........................... 9-11 Nm
3 Bolt (M6 X 25, 4 piece)........................... 9-11 Nm
4 Bolt (M8 X 85, 2 piece)...................20.5-20.5 Nm
5 Coolant Pump Housing
6 Bolt (M6 X 16, 4 piece)........................... 9-11 Nm7 Coolant Pump Pulley
8 Coolant Inlet Hose
9 Heater Hose
10 Coolant Bypass Hose
11 Gasket
Page 515 of 1463
1D2-10 M161 ENGINE COOLING
Tools Required
124 589 15 21 00 Tester
Removal & Installation Procedure
1. Drain the coolant.
2. Disconnect the coolant hoses (8, 9, 10).
3. Tak off the drive belt.
4. Unscrew the four bolts (6) from coolant pump pulley and
remove the pulley (7).
Installation Notice
Tightening Torque 9 - 11 Nm
22.5 - 27.5 Nm
(1, 2, 3)
(4) Notice
Hold the pulley with special tool (603 589 00 40 00) while
removing the pulley.
Tightening Torque 9 - 11 Nm
5. Unscrew the bolts (1, 2, 3, 4) from coolant pump housing
(5) and remove the coolant pump.
Installation Notice
6. Clean the sealing surface.
7. Replace the gasket with new one.
Notice
Apply the sealant when the sealing surface of coolant pump
housing and coolant mounting area is clean.
8. Installation should follow the removal procedure in the
reverse order.
9. Check for leaks by starting the engine.
Page 516 of 1463
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 Hose4 Coolant Outlet Hose
5 Thermostat
6 O-ring
Page 517 of 1463
1D2-12 M161 ENGINE COOLING
THERMOSTAT HOUSING ASSEMBLY
Preceding Work : Removal of viscous clutch
1a Bolt (M6 X 95, 2 pieces)......................... 9-11 Nm
1b Bolt (M8 X 75, 2 pieces).................22.5-27.5 Nm
1c Bolt (M8 X 35, 1 piece)...................22.5-27.5 Nm
2 Thermostat Housing Assembly
3 O-ring4 De-aeration Hose
5 Coolant Outlet Hose
6 Coolant Bypass Hose
7 Tensioning Device Shock Absorber
8 Engine Hanger Brocket
Page 518 of 1463
M161 ENGINE COOLING 1D2-13
Removal & Installation Procedure
1. Drain the coolant.
2. Remove the de-aeration hose (4), coolant outlet hose (5)
and coolant bypass hose (6).
3. Disconnect the coolant temperature sensor connector.
4. Unscrew the bolt (1c) and pry off the tensioning device shock
absorber (7).
Installation Notice
6. Replace the O-ring with new one.
7. Installation should follow the removal procedure in the
reverse order.
8. Check for leaks in cooling system. 5. Unscrow the bolts (1a, 1b) and remove the engine
hanger bracket and thermostat housing.
Installation Notice
Tightening Torque9 - 11 Nm
22.5 - 27.5 Nm
(1a)
(1b)
Tightening Torque 22.5 - 27.5 Nm
Page 519 of 1463
1D2-14 M161 ENGINE COOLING
REMOVAL AND INSTALLATION OF COOLING FAN SHROUD
Removal & Installation Procedure
1. Unscrew two bolts from cooling fan shroud and remove
the shrud.
Installation Notice 1 Fan Suroud Assembly
Tightening Torque 3 - 7 Nm
2 Bolt (M6 X 16, 2 pieces)...........................3-7 Nm
2. Installation should follow the removal procedure in the
reverse order.
Page 520 of 1463
M161 ENGINE COOLING 1D2-15
REMOVAL AND INSTALLATION OF RADIATOR
Preceding Work : Removal of cooling fan shroud
1 Inlet Hose
2 Hose (to Engine)
3 Hose (to 3-way Connector)
4 Make-up Hose (to Coolant Reservoir)
5 3-way Connector
6 Automatic Transmission Oil Cooling Hose (A/T
Equippend Vehicle)7 Bolt (M6 X 20, 4 pieces)...........................3-7 Nm
8 Insulator
9 Radiator Bracket
10 Radiator