Page 738 of 2053
1D3 -- 2 OM600 ENGINE COOLING
D AEW OO M Y_2000
DIAGNOSIS
COOLING CIRCULATION
A Thermostat
B Radiator
D From Heater
EHoseG Deaeration Line
HReservoir
Page 739 of 2053
1D3 -- 4 OM600 ENGINE COOLING
D AEW OO M Y_2000
COOLING SYSTEM LEAKAGE TEST
Tools Required
124589152100Tester
Test
1. Loosen the pressure cap by 1 notch and remove the
cap after.
Notice
Do not remove radiator cap when coolant is above
90°C.
2. Add the coolant to the arrow mark of coolant reser-
voir.
3. Connect the special tool to the injector of reservoir
and apply 1.4bar pressure.
Tester 124 589 15 21 00
4. If the pressure on the tester drops, check the hose,
pipe and leakage and, replace or retighten.
Page 740 of 2053
OM600 ENGINE COOLING 1D3 -- 5
D AEW OO M Y_2000
MAINTENANCE AND REPAIR
ON -- VEHICLE SERVICE
DRAIN AND FILLING OF COOLANT
Preceding Work : Removal of skid plate
Drain / Filling
1. Loosen the pressure cap of reservoir by 1 notch and
remove pressure and then loosen the cap.
Notice
Do not remove radiator cap when coolant is above
90°C.
2. Open the drain plug and drain the coolant.
Notice
Collect the coolant by using the proper bottle.
3. Remove the drain plug(1) and seal(2) of cylinder
block and drain the coolant.
4. Replace the seal to new one and tighten the drain
plug.
Installation Notice
Tightening Torque30 N∙m (22 lb-ft)
5. Tighten the drain plug of the lower radiator.
6. Fill the coolant through coolant reservoir -- tank.
Notice
DA proportion of 50% by volume of water / anticor-
rosion must be ensured.
7. After engine is running at idle speed, check the level
of coolant. If necessary, add enough specified cool-
ant.
Page 741 of 2053
1D3 -- 6 OM600 ENGINE COOLING
D AEW OO M Y_2000
WAT E R P U M P
Preceding Work : Removal of cooling fan
Removal of V-- belt
1 Tensioning Lever
2 Gasket Replace..........................
3Bolt 10N∙m (89 lb-in) .....................4 Belt Pulley
5Bolt 10N∙m(89lb-in) .....................
6 Water Pump
Page 742 of 2053
OM600 ENGINE COOLING 1D3 -- 7
D AEW OO M Y_2000
Removal & Installation Procedure
1. Loose the bolts(5) and remove the pulley (4).
Installation Notice
Tightening Torque10 N∙m(89lb-in)
2. Loose the bolts (3).
Installation Notice
Tightening Torque10 N∙m(89lb-in)
3. Pull the tensioning lever(1) to the arrow direction.
4. Remove the water pump(6).
Notice
Clean gasket residues on the sealing surface of wa-
ter pump and replace the gasket.
5. Installation should follow the removal procedure in
the reverse order.
Page 743 of 2053
1D3 -- 8 OM600 ENGINE COOLING
D AEW OO M Y_2000
WATER PUMP HOUSING
Preceding Work : Removal of water pump
Removal of thermostat
Removal of generator
1 Gasket Replace..........................
2 Water Pump Housing
3 Connector
4Bolt 10N∙m (89 lb-in) .....................5 Coolant Hose
6ReturnPipe
7 O -- Ring
8 Temperature Sensor
Notice
The bolt on the arrow should be installed last.
Page 744 of 2053
OM600 ENGINE COOLING 1D3 -- 9
D AEW OO M Y_2000
Removal & Installation Procedure
1. Disconnect the connector(3).
2. Separate the coolant hose (5) and return pipe(6).
3. Remove the bolts(4) evenly.
Installation Notice
Tightening Torque10 N∙m(89lb-in)
Notice
Clean gasket residues on the sealing surface of wa-
ter pump and replace the gasket.
4. Remove the water pump housing(2).
5. Installation should follow the removal procedure in
the reverse order.
Page 745 of 2053
1D3 -- 10 OM600 ENGINE COOLING
D AEW OO M Y_2000
COOLING FAN CLUTCH
1 Belt Pulley
2 Cooling Fan Clutch
3 Cooling Fan4 Socket Bolt 45 N∙m (33 lb-ft) ...............
5 Socket Bolt 10 N∙m(89lb-in) ...............
Tools Required
603 589 00 40 00 Counter Holder