Page 497 of 1463
1D1-8 M162 ENGINE COOLING
WATER PUMP
Preceding Work : Removal of V-belt
Removal of air admission housing
1 Air Admission Housing
2 Oil Cooler Pipe Line
3 Seal....................................................... Replace
4 Bolt........................................................9-11 Nm
5 Coolant Hose
6 Coolant Hose
7 Outlet Coolant Hose8 Coolant Hose
9 Inlet Coolant Hose
10 Coolant Pump
1 1 Bolt........................................................... 21 Nm
12 Dowel Sleeve
1 3 Seal....................................................... Replace
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 522 of 1463

SECTION 1D3
OM600 ENGINE COOLING
Specifications . . . . . . . . . . . . . . . . . . . . . . . 1D3-1
General Specifications . . . . . . . . . . . . . . . . . 1D3-1
Fastener Tightening Specifications . . . . . . . . 1D3-1
Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . 1D3-2
Cooling Circulation . . . . . . . . . . . . . . . . . . . . 1D3-2
Thermostat Operation . . . . . . . . . . . . . . . . . 1D3-3
Cooling System Leakage Test . . . . . . . . . . . 1D3-4
Maintenance and Repair . . . . . . . . . . . . . . 1D3-5On-Vehicle Service . . . . . . . . . . . . . . . . . . . . 1D3-5
Drain and Filling of Coolant . . . . . . . . . . . . . 1D3-5
Coolant Pump . . . . . . . . . . . . . . . . . . . . . . . . 1D3-6
Coolant Pump Housing . . . . . . . . . . . . . . . . . 1D3-8
Cooling Fan Clutch . . . . . . . . . . . . . . . . . . . 1D3-10
Radiator . . . . . . . . . . . . . . . . . . . . . . . . . . . 1D3-12
Cooling Sub-System . . . . . . . . . . . . . . . . . . 1D3-14
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . 1D3-16
TABLE OF CONTENTS
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 otherwise
noted.
Application
Coolant
Mixing Ratio (Water : anticorrosion)
CapacityDescription
ALUTEC P- 78
50 : 50
10.5L - 11L
9.5L - 10L
SPECIFICATIONS
GENERAL SPECIFICATIONS
Application
Coolant Pump Bolt
Belt Pulley Bolt
Coolant Pump Housing Return Pipe Bolt
Thermostat Bolt
Cooling Fan Clutch Socket Bolt (Center)
Cooling Fan Clutch Socket Bolt (Side)
Radiator Bolt
Coolant Sub-tank BoltN
· ·· ·
·m
10
10
10
10
45
10
3 - 7
3 - 7
FASTENER TIGHTENING SPECIFICATIONS
662LA
661LA
Page 527 of 1463
1D3-6 OM600 ENGINE COOLING
COOLANT PUMP
Preceding Work : Removal of cooling fan
Removal of V-belt
1 Tensioning Lever
2 Gasket ................................................... Replace
3 Bolt........................................................... 10 Nm4 Belt Pulley
5 Bolt........................................................... 10 Nm
6 Coolant Pump
Page 531 of 1463
1D3-10 OM600 ENGINE COOLING
COOLING FAN CLUTCH
1 Belt Pulley
2 Cooling Fan Clutch
3 Cooling Fan4 Socket Bolt................................................ 45 Nm
5 Socket Bolt................................................ 10 Nm
Tools Required
603 589 00 40 00 Counter Holder
Page 542 of 1463
1E1-4 M162 ENGINE ELECTRICAL
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
ALTERNATOR
Preceding Work : Removal of the drivebelt
Removal & Installation Procedure
1. Disconnect the negative battery terminal.
2. Unscrew the nut and disconnect the terminal (1).
Installation Notice
1 Terminal (B+)
2 Terminal (D+)
3 Combination Bolt
4 Alternator
3. Unscrew the nut and disconnect the terminal (2).
Installation Notice
Tightening Torque 14 - 18 Nm
4. Unscrew the combination bolt (3).
Installation Notice
Tightening Torque 4 - 5 Nm
5. Remove the alternator.
6. Installation should follow the removal procedure in the
reverse order.
Tightening Torque 42 - 50 Nm
Page 554 of 1463
1E2-4 M161 ENGINE ELECTRICAL
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE
ALTERNATOR
Preceding Work : Removal of the drivebelt
Removal & Installation Procedure
1. Disconnect the negative battery terminal.
2. Unscrew the nut and disconnect the terminal (1).
Installation Notice
1 Terminal (B+)
2 Terminal (D+)
3 Combination Bolt
4 Alternator
3. Unscrew the nut and disconnect the terminal (2).
Installation Notice
Tightening Torque 14 - 18 Nm
4. Unscrew the combination bolt (3).
Installation Notice
Tightening Torque 4 - 5 Nm
5. Remove the alternator.
6. Installation should follow the removal procedure in the
reverse order.
Tightening Torque 42 - 50 Nm
Page 568 of 1463
1E3-6 OM600 ENGINE ELECTRICAL
ALTERNATOR
Preceding Work : Removal of poly V-belt
1 Cooling Fan
2 Bolt............................................................45Nm
3 Bolt............................................................45Nm4 Alternator
5 Plug Connection