Page 400 of 2053
M161 ENGINE COOLING 1D2 -- 5
D AEW OO M Y_2000
MAINTENANCE AND REPAIR
ON -- VEHICLE SERVICE
COOLANT DRAIN AND FILL UP
Draning & Filling up Procedure
1. Loosen the cap a little and release pressure and re-
move the cap.
Notice:For the risk of scalding, the cap must not be
opened unless the coolant temperature is below 90°C.
2. Loosen the radiator lower drain cock and drain the
coolant.
Notice:Collect the coolant by using a proper container.
3. Drain the coolant from the crankcase by inserting a
hose (dia. 14mm) onto the drain bolt on the side of
crankcase (exhaust manifold) and by loosening the
plug.
Notice
DJust loosen the drain plug to drain the coolant and do
not remove the plug completely.
DCollect the coolant by using the proper container.
Page 401 of 2053
1D2 -- 6 M161 ENGINE COOLING
D AEW OO M Y_2000
4. After complete draining of the coolant, remove the
hose connector to drain plug and reinstall the drain
plug.
Installation Notice
Tightening Torque
30 NSm (22 lb-ft)
5. Tighten the radiator lower drain cock.
6. Remove the de-- aeration hose clamp in the water
pump and remove the de-- aeration hose.
7. Fill up the coolant through the coolant reservoir
tank.
Notice
DMatchtheanti--freezeandthewaterratioto50:50.
DSupplement the coolant until the coolant overflows to
the deaeration hose.
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 406 of 2053
M161 ENGINE COOLING 1D2 -- 11
D AEW OO M Y_2000
THERMOSTAT
1 Bolt (M6 X 25, 3 pieces)
9--11 NSm (80-- 97 lb-in) .....................
2 Thermostat Cover
3 De-- aeration Hose4 Coolant Outlet Hose
5 Thermostat
6O--ring
Removal & Installation Procedure
1. Drain the coolant from the radiator.
2. Loosen the hose mounting clip and remove the cool-
ant hose (3, 4).
3. Unscrew the three bolts (1) and remove the thermo-
stat cover assembly from thermostat housing.
Installation Notice
Tightening Torque
9--11NSm (80 -- 97 lb-in)
Do not separate the thermostat cover and thermo-
stat.
4. Replace the O -- ring if necessary.
5. Check the leakage in the cooling system.
Page 410 of 2053
M161 ENGINE COOLING 1D2 -- 15
D AEW OO M Y_2000
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 NSm (27-- 62 lb-in) .....................
8 Insulator
9 Radiator Bracket
10 Radiator
Page 411 of 2053
1D2 -- 16 M161 ENGINE COOLING
D AEW OO M Y_2000
Removal & Installation Procedure
1. Drain coolant from the radiator.
2. Remove the coolant thermo connector from the ra-
diator.
3. Remove the each coolant hoses.
4. Remove the automatic transmission fluid cooler
pipes from radiator.
Installation Notice
Tightening Torque
20 NSm (15 lb-ft)
5. Remove all the bolts (7) from the radiator bracket (9)
and remove the bracket (9) and insulator (8).
Installation Notice
Tightening Torque
3--7NSm (27 -- 62 lb-in)
6. Remove the radiator (10).
7. Check the radiator pin for crack, damage, leakage
and bending and replace it if necessary.
8. Installation is reverse order of removal.
9. Check for leakage in the cooling system.
Page 549 of 2053

1A3 -- 14 GENERAL ENGINE INFORMATION
D AEW OO M Y_2000
Leakage Test
1. Run the engine to be the coolant temperature 80_C.
2. Remove the fuel injection nozzle.
3. Open the coolant subtank cap.
4. Check the coolant level and replenish if necessary.
5. Open the oil filler cap.
6. Remove the air cleaner cover and element.
7. Position the piston at TDC.
8. Install the connector (1) and connection piece (2).
9. Calibrate the tester and connect the connection
hose (3)
10. Pressurize with compressed air and compare the
pressure changes with permissible pressure leak-
age.
11. If permissible pressure leakage is out of standard,
check followings :
-- Intake and exhaust lines.
-- Sounds in oil filler area.
-- Air bubbles in radiator coolant.
12. Do pressure leakage test for the remaining cylinders
according to the firing order.
DOM 662LA Engine : 1-- 2-- 4-- 5-- 3
DOM 661LA Engine : 1-- 3-- 4-- 2
13. Remove the tester.
14. Close the coolant pressure cap and oil filler cap.
15. Install the air cleaner element and cover.
16. Install the fuel injection nozzle.
Page 562 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 13
D AEW OO M Y_2000
Removal & Installation Procedure
1. Disconnect the negative terminal of battery.
2. Remove the hood.
3. Remove the skid plate.
Installation Notice
Tightening Torque28-- 47 N∙m (21-- 35 lb-ft)
4. Remove the radiator drain cock and drain the cool-
ant.
Notice
Open the coolant reservoir tank cap.
5. Remove the drain plug (1) and seal (2) from the cyl-
inder block and drain the coolant completely.
6. After draining, replace the seal and reinstall the
drain plug.
Installation Notice
Tightening Torque30 N∙m (22 lb-ft)
7. Disconnect the lower coolant hose from the radiator.
Page 589 of 2053
1B3 -- 40 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Disassembly Procedure
1. Completely drain the coolant from the radiator and
cylinder block.
2. Remove the cooling fan shroud.
3. Hold the fan with counter holder and remove the bolt
and then remove the cooling fan.
Notice
Keep the fan in vertical position.
Counter Holder 603 589 00 40 00
4. Remove the bracket oil dipstick tube.
5. Remove the nut.
6. Remove the nut on the tensioning lever and insert
the rod(F12’ 180mm). By pushing the rod to the ar-
row direction, pull back the bolt.
7. Push the tensioning lever to the opposite direction to
release the spring tension and remove the poly V--
belt.