Page 514 of 2053

1F2 -- 96 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F550
8. Using the fuel tank cap wrench 661 589 00 46 00,
remove the locking cap.
9. Remove the pump from the fuel tank.
Notice:Check the condition of the seal and replace if
necessary. Drain the fuel before removing the pump.
10. Perform an operational check of the fuel pump.
11. Installation should follow the removal procedure in
the reverse order.
YAA1F190
FUEL FILTER
Removal and Installation Procedure
1. Disconnect the negative battery cable.
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
2. Relieve the fuel system pressure. Refer to “Dis-
charging the Pressure in Fuel System” in this sec-
tion.
3. Disconnect the fuel lines from the fuel filter.
Installation Notice
Tightening Torque
28 NSm (21 lb-ft)
4. Remove the fuel filter mounting bracket bolt .
Installation Notice
Tightening Torque
6NSm (53 lb-in)
Notice:Place the fuel pump pad. There may be a corro-
sion due to the contact between the fuel filter and the
bracket.
5. Remove the fuel filter.
6. Install the fuel filter.
7. Perform a leak test of the fuel filter.
8. Installation should follow the removal procedure in
the reverse order.
Page 516 of 2053

1F2 -- 98 M161 ENGINE CONTROLS
D AEW OO M Y_2000
YAA1F180
14. Turn the roll over valves counterclockwise at an
angle of 90 degrees.
15. Turn the lock ring counterclockwise.
16. Remove and discard the gasket.
17. Installation should follow the removal procedure in
the reverse order.
YAA1F700
FUEL PRESSURE REGULATOR
Removal and Installation Procedure
1. Disconnect the negative battery cable.
2. Remove the fuel pressure test connector.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)
YAA1F720
Caution: The fuel system is under pressure. To
avoid fuel spillage and the risk of personal injury or
fire, it is necessary to relieve the fuel system pres -
sure before disconnecting the fuel lines.
3. Relieve the fuel pressure in fuel supply system by
pressing the service valve.
YAA1F730
4. Disconnect the vacuum hose.
5. Disconnect the circlip and remove the fuel pressure
regulator.
6. Apply the oil to O-ring lightly and then replace it.
7. Perform a leak test of the fuel pressure regulator
with the engine off and the ignition on.
8. Installation should follow the removal procedure in
the reverse order.
Page 520 of 2053

1F2 -- 102 M161 ENGINE CONTROLS
D AEW OO M Y_2000
KAA1F190
HOT FILM AIR MASS (HFM) SENSOR
Removal and Installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the Hot Film Air Mass (HFM) sensor
electrical connector.
3. Remove the HFM sensor retaining screws.
4. Turn the HFM sensor coupling in the direction
shown in the figure in the left so that it gets sepa-
rated from the contact surface.
Notice:Make sure the HFM sensor coupling connects
completely with the contact surface installation.
5. Remove the HFM sensor.
6. Installation should follow the removal procedure in
the reverse order.
KAA1F180
KNOCK SENSOR
Removal and installation Procedure
1. Disconnect the negative battery cable.
2. Disconnect the knock sensor electrical connector
from the intake manifold bracket.
3. Remove the knock sensor mounting bolt from the
knock sensor installed on the cylinder block.
Installation Notice
Tightening Torque
25 NSm (18 Ib-ft)
4. Remove the knock sensor.
5. Installation should follow the removal procedure in
the reverse order.
Page 524 of 2053
D AEW OO M Y_2000
SECTION 1G2
M161 ENGINE INTAKE & EXHAUST
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless other -
wise noted.
TABLE OF CONTENTS
Specifications 1G2 -- 2...........................
Fastener Tightening Specifications 1G2 -- 2.........
Maintenance and Repair 1G2 -- 3..................
On-- Vehicle Service 1G2-- 3........................
Air Cleaner 1G2-- 3.............................
Air Intake Shield 1G2-- 5.........................Intake Air Duct 1G2--6..........................
Intake Manifold 1G2--8.........................
Exhaust Manifold 1G2-- 10.......................
Removal and Installation of Exhaust
System 1G2-- 12.............................
Page 550 of 2053

GENERAL ENGINE INFORMATION 1A3 -- 15
D AEW OO M Y_2000
GENERAL INFORMATION
CLEANLINESS AND CARE
An automobile engine is a combination of many ma-
chined, honed, polished and lapped surfaces with toler-
ances that are measured in the ten-- thousanths of an
inch. When any internal engine parts are serviced, care
and cleanliness are important. A liberal coating of en-
igne oil should be applied to friction areas during assem-
bly, to protect and lubricate the surfaces on initial
operation. Proper cleaning and protection of machined
surfaces and friction areas is part fo the repair proce-
dure. This is considered standard shop practice even if
not specifically stated.
Whenever valve train components are removed for ser-
vice, they should be kept in order. They should be
installed in the same locations, and with the same mat-
ing surfaces, as when they were removed.
Battery cables should be disconnected before any major
work is performed on the engine. Failure to disconnectcables may result in damage to wire harness or other
electrical parts.
ON-- ENGINE SERVICE
Caution: Disconnect the negative battery cable be -
fore removing or installing any electrical unit, or
when a tool or equipment could easily come in con-
tact with exposed electrical terminals. Disconnect -
ing this cable will help prevent personal injury and
damage to the vehicle. The ignition must also be in
LOCK unless otherwise noted.
Notice:Any time the air cleaner is removed, the intake
opening should be covered. Thiswill protect against ac-
cidental entrance of foreign material, which could follow
the intake passage into the cylinder and cause exten-
sive damage when the engine is started.
Page 551 of 2053

D AEW OO M Y_2000
SECTION 1B3
OM600 ENGINE MECHANICAL
CAUTION: Disconnect the negative battery cable before removing or installing any electrical unit or when a
tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable
will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless
otherwise noted.
TABLE OF CONTENTS
Specifications 1B3 -- 2............................
Fastener Tightening Specifications 1B3 -- 2..........
Special Tools 1B3 -- 4.............................
Special Tools Table 1B3-- 4.......................
Maintenance and Repair 1B3 -- 12..................
On-- Vehicle Service 1B3-- 12........................
Engine Assembly 1B3-- 12........................
Poly V-- Belt 1B3 -- 21.............................
Tensioning Device 1B3-- 23.......................
Poly V-- Belt Alignment & Inspection 1B3-- 26........
Prechamber 1B3-- 29............................
Milling of Prechamber Sealing Surface 1B3 -- 32.....
TDC (TDC Sensor Bracket) Setting 1B3 -- 35........
Cylinder Head 1B3-- 37...........................
Timing Case Cover 1B3 -- 63......................
Crankshaft End Cover 1B3-- 71...................
Vibration Damper and Hub 1B3-- 74...............
Crankshaft Front Radial Seal 1B3-- 80.............
Crankshaft Ball Bearing 1B3-- 82..................
Crankshaft 1B3-- 83.............................
Flywheel 1B3 -- 93...............................
Machining of Flywheel 1B3-- 97...................
Flywheel Ring Gear 1B3 -- 98......................
Hydraulic Valve Clearance Compensation
Element Check 1B3-- 101.........................
Valve Tappets 1B3-- 103..........................
Valve Spring Check 1B3-- 105.....................Valve Springs (Cylinder Head Removed) 1B3-- 106..
Valve Springs (Cylinder Head Installed) 1B3-- 109...
Valve Stem Seals 1B3-- 112......................
Check and Replacement of Valve Guides 1B3-- 116..
Valve Seat Rings 1B3-- 122.......................
Check and Machining of Valves 1B3-- 127..........
Machining of Valve Seat 1B3-- 132.................
Camshaft Timing Test 1B3-- 137...................
Camshaft 1B3-- 139.............................
Chain Tensioner 1B3-- 145........................
Timing Chain 1B3-- 147...........................
Tensioning Rail 1B3-- 151.........................
Cylinder Head Guide Rail 1B3-- 152................
Timing Case Cover Guide Rail 1B3-- 156...........
Crankshaft Sprocket 1B3-- 158....................
Piston 1B3-- 163.................................
Oil Filter 1B3-- 169...............................
Oil Pan 1B3-- 171................................
Oil Spray Nozzle 1B3-- 174.......................
Oil Pump 1B3-- 175..............................
Unit Repair 1B3 -- 177............................
Cylinder Head Pressure Leakage Test 1B3-- 177....
Facing Cylinder Head Mating Surface 1B3 -- 178.....
Replacement of Crankcase Core Plug 1B3-- 180.....
Facing Crankcase Contacting Surface 1B3 -- 182....
Oil Gallery Steel Ball 1B3-- 183....................
Cylinder Bore Measurement 1B3-- 187.............
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 585 of 2053

1B3 -- 36 OM600 ENGINE MECHANICAL
D AEW OO M Y_2000
Setting (with cylinder head installed)
1. Remove the prechamber of No. 1 cylinder.
2. Position the piston of No.1 cylinder at BTDC 10.
3. Install the measuring device into the prechamber
bore and position the dial gauge with a preload of
5mm.
Dial Gauge 001 589 53 21 00
Depth Gauge 601 589 07 21 00
4. Slowly rotate the crankshaft in the direction of en-
gine rotation until the large pointer on the dial gauge
stops (TDC position).
Notice
The position of TDC is when the large pointer on the
dial gauge is stopped before moving back.
5. Remove the reinstall the measuring device and
position the dial gauge scale at ’0’.
6. Slowly rotate the crankshaft in the direction of en-
gine rotation until the dial gauge has moved back
(counterclockwise) by 3.65mm.
7. Insert fixing device into the sensor bracket.
Notice
The pin on the vibration damper must engage into
the slot of the fixing device.
Fixing Device 667 589 01 21 00
8. If the pin does not engage, adjust the setting of the
sensor bracket by removing and tightening of the
sensor bracket bolts.
Tightening Torque10 N∙m(89lb-in)
Notice
The timing mark on the damper must be positioned
at ATDC 20.