Page 509 of 1463
1D2-4 M161 ENGINE COOLING
DIAGNOSIS
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.
Page 511 of 1463
1D2-6 M161 ENGINE COOLING
4. After complete draining of the coolant, remove the hose
connector 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 pump
and remove the de-aeration hose.
7. Fill up the coolant through the coolant reservoir tank.
Notice
lMatch the anti-freeze and the water ratio to 50 : 50.
lSupplement 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 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
Page 525 of 1463
1D3-4 OM600 ENGINE COOLING
COOLING SYSTEM LEAKAGE TEST
Tools Required
124 589 15 21 00 Tester
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 reservoir.
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 526 of 1463
OM600 ENGINE COOLING 1D3-5
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 Torque 30 Nm
5. Tighten the drain plug of the lower radiator.
6. Fill the coolant through coolant reservoir-tank.
Notice
lA proportion of 50% by volume of water / anticorrosion
must be ensured
7. After engine is running at idle speed, check the level of
coolant. If necessary, add enough specified coolant.
MAINTENANCE AND REPAIR
ON-VEHICLE SERVICE