Page 532 of 2053

M161 ENGINE INTAKE & EXHAUST 1G2 -- 9
D AEW OO M Y_2000
Removal & Installation Procedure
1. Disconnect the battery ground cable.
2. Remove idle speed control plug connector (arrow).
3. Disconnect the brake booster vacuum line and other
vacuum lines.
4. Disconnect the rod from bearing bracket assembly
and remove the connection piece (8).
Installation Notice
Tightening Torque
36 -- 44 NSm (27 -- 33 lb-ft)
5. Unscrew the three bolts (4) and remove the idle regu-
lator and intermediate flange (6).
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
6. Unscrew the two bolts (M8 X 16) and remove the sup-
port assembly.
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
7. Unscrew the intake manifold mounting bolts (1) and
remove the intake manifold and gasket.
Installation Notice
Tightening Torque
22.5 -- 27.5 NSm
(16.6 -- 20.3 lb-ft)
Notice:Replace the gasket with new one.
8. Installation should follow the removal procedure in
the reverse order.
9. Start the engine and check for leaks in each connec-
tion.
Page 534 of 2053
M161 ENGINE INTAKE & EXHAUST 1G2 -- 11
D AEW OO M Y_2000
Removal & Installation Procedure
1. Remove the oxygen sensor if necessary.
Installation Notice
Tightening Torque
55 NSm (41 lb-ft)
2. Unscrew the bolt (2) and remove the exhaust man-
ifold upper cover (3).
3. Unscrew the flange bolt (6) of front exhaust pipe and
separate the front exhaust pipe.
Installation Notice
Tightening Torque
30 NSm (22 lb-ft)
Notice:Check the exhaust pipe mounting nut, and re-
place it with new one if necessary.
4. Unscrew the eleven nuts (4) and remove the exhaust
manifold (5) and gasket (7).
Installation Notice
Tightening Torque
31.5 -- 38.5 NSm
(23.2 -- 28.4 lb-ft)
5. Replace the gasket (7) with new one.
6. Installation should follow the removal procedure in
the reverse order.
Page 536 of 2053

D AEW OO M Y_2000
SECTION 1
ENGINE
SECTION 1A3 (OM600 ENGINE)
GENERAL ENGINE INFORMATION
TABLE OF CONTENTS
Specifications 1A3 -- 1............................
Engine Specifications 1A3-- 1.....................
Sectional View 1A3 -- 3............................
OM662LA Engine 1A3-- 3........................
OM661LA Engine 1A3-- 5........................
Performance Curve 1A3-- 7........................
OM662LA Engine 1A3-- 7........................
OM661LA Engine 1A3-- 8........................
Special Tools 1A3 -- 9.............................Special Tools Table 1A3-- 9.......................
Diagnosis 1A3 -- 10................................
Oil Leak Diagnosis 1A3-- 10.......................
Compression Pressure Test 1A3-- 11..............
Cylinder Pressure Leakage Test 1A3-- 13...........
General Information 1A3 -- 15......................
Cleanliness and Care 1A3 -- 15....................
On-- Engine Service 1A3-- 15......................
SPECIFICATIONS
ENGINE SPECIFICATIONS
ApplicationOM662LAOM661LA
Engine TypeFour -- Stroke DieselFour -- Stroke Diesel
Displacement (CC)28742299
Cylinder (Bore x Stroke)(mm)89 x 92.489 x 92.4
Fuel Injection / Ignition SystemPES 5 M55 C320 RS 168PES 5 M55 C320 RS 167
Compression Ratio22 :122 :1
Number of Cylinders54
Camshaft Valve ArrangementSOHCSOHC
Camshaft Drive TypeChain -- DriveChain-- Drive
Max. Output (ps/rpm)120 / 4000101 / 4000
Max. Torque (kgSm/rpm)25.5 / 400021.5 / 2400
Firing Order1--2--4--5--31--3--4--2
Injection TimingBTDC 18_±10_BTDC 18_±10_
Valve Timing
(t2lift)
IntakeOpen/CloseAT DC 11 . 3 3_/ ABDC 17_AT DC 11 . 3 3_/ ABDC 17_g
(at 2mm lift)ExhaustOpen/CloseBBDC 28_/ BTDC 15.25_BBDC 28_/ BTDC 15.25_
Valve Clearance AdjustmentAutomatic ControlAutomatic Control
Page 544 of 2053
GENERAL ENGINE INFORMATION 1A3 -- 9
D AEW OO M Y_2000
SPECIAL TOOLS
SPECIAL TOOLS TABLE
000 589 10 99 01
Torque Wrench
001 589 76 21 00
Compression Pressure
Tester
601 589 65 09 00
Socket
001 589 73 21 00
Hand Vacuum Pump
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 563 of 2053
1B3 -- 14 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
8. Disconnect the upper coolant hose from the radia-
tor.
9. Loosen the bolt and remove the coolant pipe and
cooling fan shroud.
Installation Notice
Tightening Torque3--7N∙m (27-- 62 lb-in)
10. Remove the hoses (air intake to intercooler, inter-
cooler to intake duct).
11. Remove the pipes connected to intercooler.
Page 567 of 2053
1B3 -- 18 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
27. Disconnect the preheating time relay sensor plug.
28. Disconnect the coolant temperature sensor plug.
29. Disconnect the accelerator cable from the control
linkage.
Installation Notice
Tightening Torque8--18 N∙m (6 -- 13 lb-ft)
30. Loosen the connection of control pressure cable (an
arrow) used in auto transmisson.
Page 568 of 2053
OM600 ENGINE MECHANICAL 1B3 -- 19
D AEW OO M Y_2000
31. Separate the exhaust pipe flange from the turbo
charger.
Installation Notice
Tightening Torque30 N∙m (22 lb-ft)
32. Loosen the installing bolt of clutch release cylinder
and remove the clutch release cylinder.
Installation Notice
Tightening Torque20-- 34 N∙m (15-- 25 lb-ft)
33. Disconnect the exhaust pipe flange from the ex-
haust manifold.
Installation Notice
Tightening Torque30 N∙m (22 lb-ft)
34. Remove the propeller shaft from the transmission.
Installation Notice
TighteningTorque
Axle 70-- 80 N∙m
(52--59 lb-ft)
TighteningTorqueT/C 81 -- 89 N∙m
(60--66 lb-ft)
35. Remove the shift control cable.
36. Remove the transmission.