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M162 ENGINE COOLING 1D1-7
COOLANT CONNECTION FITTING Preceding Work : Removal of cooling fan shroud
1 Bolt (M8 X 100, 2 pieces) ...............22.5-27.5 Nm
2 Engine Hanger Bracket
3 Coolant Outlet Port
Removal & Installation Procedure
1. Drain coolant from the radiator.
2. Remove the hose mounting clamp (5) and disconnect the coolant hose (6).
3. Remove the two bolts (1), the engine hanger bracket (2) and coolant outlet port (3).Installation Notice 4 O-ring
5 Hose Mounting Clamp
6 Hose
Replace the O-ring with new one.
4. Installation should follow the removal procedure in the reverse order.
5. Fill up the coolant as specified.
6. Check the leaks in the cooling system.
Tightening Torque 22.5 - 27.5 Nm
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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
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M162 ENGINE COOLING 1D1-11
OIL COOLER PIPE LINE Preceding Work : Removal of upper intake manifold
Tightening Torque 9 - 11 Nm
1 Upper Intake Manifold
2 Bolt (M6 X 35, 1 piece)
...........................9-11 Nm
3 Bolt (M6 X 16, 2 pieces) .........................9-11 Nm4 Oil Cooler Pipe Line
5 O-ring .................................................... Replace
Removal & Installation Procedure
1. Drain the coolant.
2. Unscrew the bolts (2, 3) and remove the oil cooler pipe line (4). Replace the O-ring with new one. Installation Notice
3. Installation should follow the removal procedure in the reverse order.
4. Fill up the coolant as specified.
5. Check the leaks in the cooling system.
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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.
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1D2-4 M161 ENGINE COOLINGDIAGNOSIS
3. Connect the special tool to the reservoir filler cap and apply 1.4 bar of pressure.
SYSTEM LEAKAGE TEST
Tools Required
124 589 15 21 00 Tester
Test Procedure
1. Loosen the cap a little and release pressure and remove
the cap. Notice For the risk of scalding, cap must not be opened unless the coolant temperature is below 90 °C.
2. Fill coolant up to upper edge (arrow) of reservoir.
Tester 124 589 15 21 00
4. If the pressure on the tester drops, check leakage at the all coolant hoses and pipes and each connections. Replace
or retighten if necessary.
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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.
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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 andremove 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. NoticeApply 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.
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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