Page 103 of 2053
1B1 -- 76 M162 ENGINE MECHANICAL
D AEW OO M Y_2000
CYLINDER HEAD GUIDE RAIL
Preceding Work: Removal of cylinder head front cover
1 Chain Tensioner
2 Upper Guide Rail3 Upper Guide Rail Pin
4 Wrench
Removal & Installation Procedure
1. Remove the chain tensioner (1).
2. Turn the exhaust camshaft to the camshaft rotating
direction using the wrench (4) and loosen the timing
chain at upper guide rail (2).
3. Pull out the upper guide rail pin from the guide rail (2).
4. Turn the exhaust camshaft to the opposite direction
of rotation using the wrench.
5. Check for damages at the upper sliding rail and re-
place it if necessary. Install the upper guide rail pin.
6. Install the chain tensioner.
Installation Notice
Ti
ghteningScrew Plug40 NSm
(30 lb-ft)
Tightening
TorqueTensioner
Assembly72 -- 88 NSm
(53 -- 65 lb-ft)
Page 104 of 2053
M162 ENGINE MECHANICAL 1B1 -- 77
D AEW OO M Y_2000
CRANKCASE GUIDE RAIL
Preceding Work: Removal of timing gear case cover
1 Guide Rail
2 Plastic Guide3 Guide Rail Pin
4 Tensioning Rail
Removal & Installation Procedure
1. Put the assembly mark at the camshaft sprocket and
the timing chain with the paint (arrow).
2. Remove the exhaust camshaft sprocket.
3. Remove the guide rail (1) from the guide rail pin (3).
Notice:
DReplace the plastic guide (2) if damaged.
DConnect the plastic guide (2) and the guide rail (1) by
aligning them accurately when installing.
4. Installation should follow the removal procedure in
the reverse order.
5. Check the camshaft timing position.
Page 105 of 2053
1B1 -- 78 M162 ENGINE MECHANICAL
D AEW OO M Y_2000
CRANKSHAFT SPROCKET
Preceding Work: Removal of oil pan
Removal of tensioning rail
Removal of crank case guide rail
1 Oil Pump Chain Tensioner
2 Oil Pump Chain Bushing
3 Oil Pump Chain Spring
4 Crankshaft Sprocket
5Key6 Bolt (M8 x 20, 1 piece) / Washer
29-- 35 NSm (21-- 26 lb-ft) ....................
7 Oil Pump Sprocket
8OilPump
9 Oil Pump Roller Chain
10 Timing Chain
Page 115 of 2053

M162 ENGINE MECHANICAL 1B1 -- 89
D AEW OO M Y_2000
Oil Circulation
1OilPump
2 Oil Gallery (to oil filter)
3 Oil Filter
4 Oil Pressure Switch
5 Main Oil Gallery
6 Cylinder Head Closing Cover
7 Oil Gallery (At Chain Tensioner)
8 Oil Non-- return Valve
9 Chain Tensioner
10 Vent (Chain Tensioner)
11 Front Closing Cover (φ17 mm)
12 Oil Gallery (Perpendicular to The Shaft)
13 Ball (φ6 mm)
14 Oil Spray Nozzle (Timing Chain)
15 Oil Gallery (At Cylinder Head)
16 Ball (φ15mm)
17 Oil Restriction Inner (φ4mm)
18 Oil Supply (To Exhaust Camshaft)19 Oil Supply (To Intake Camshaft)
20 Oil Supply (To Exhaust Camshaft Bearing)
21 Oil Supply (To Intake Camshaft Bearing)
22 Oil Gallery (Oil Supply to Exhaust Valve Tappet)
23 Oil Gallery (Oil Supply to Exhaust Valve Tappet)
24 Camshaft Closing Cover
25 Ball (φ8 mm)
26 Screw Plug
27 Camshaft Adjuster
28 Front Closing Cover (Intake Camshaft)
29 Front Treaded Bushing (Exhaust Camshaft)
30 Valve tappet
a Oil Gallery (From Oil Pump to Oil Filter)
b Main Oil Gallery
c Oil Return Line (Oil Returns to the Oil Pan
when Replacing the Filter Element)
Page 123 of 2053
M162 ENGINE MECHANICAL 1B1 -- 97
D AEW OO M Y_2000
OIL NON-- RETURN VALVE
Preceding Work: Removal of timing gear case cover
1 Oil Non-- return Valve
Functions
The non -- return valve prevents the oil in the chain ten-
sioner from drying up. In other words, it stops oil-- return-
ing in order to prevent the oil in the chain tensioner from
getting dry. As a result, the chain tensioner can be acti-
vated with oil in itself.
Replacement Procedure
1. Remove the non--return valve using a pliers.
2. Insert new non-- return valve with hand.
Page 181 of 2053

1F1 -- 18 M162 ENGINE CONTROLS
D AEW OO M Y_2000
IGNITION SYSTEM
This ignition system does not use a conventional distributor andcoil. It uses a crankshaft position sensor input to the
Engine Control Module (ECM). The ECM then determines Electronic Spark Timing (EST) and triggers the electronic
ignition system ignition coil.
This type of distributorless ignition system uses a‘‘waste spark” method of spark distribution. Each cylinder is paired
with the cylinder that is opposite it (1 -- 6 or 2 -- 5 or 3 -- 4). The spark occurs simultaneously in the cylinder coming up on
the compression stroke and in the cylinder coming up on the exhaust stroke. The cylinder on the exhaust stroke re-
quires very little of the available energy to fire the spark plug. The remaining energy is available to the spark plug in the
cylinder on the compression stroke.
These systems use the EST signal from the ECM to control the EST. The ECM uses the following information:
DEngine load (mass air flow sensor).
DEngine temperature.
DIntake air temperature.
DCrankshaft position.
DEngine speed (rpm).
YAA1F310
Page 184 of 2053

M162 ENGINE CONTROLS 1F1 -- 21
D AEW OO M Y_2000
KAB1F140
Failure
CodeDescriptionTrouble AreaMaintenance Hint
64
No ignition voltage
output (No. 1 ignition
coil)DInspectiontheECMpin70(71and72)
about short circuit or open with bad
contact
DInspectionthepowersourcetoignition
65
No ignition voltage
output (No. 2 ignition
coil)Malfunction of ignition circuit
Primary current values or
secondary short circuit
DInspectionthepowersourcetoignition
coil
DInspection the ignition coil, high
tension cords etc.
DInspectionthesparkplug(wetcracks
66
No ignition voltage
output (No. 3 ignition
coil)DInspection the spark plug (wet, cracks,
wear, improper gap, burned
electrodes, heavy deposit)
DInspection the ECM
Circuit Description
The Electronic Ignition (EI) system uses a waste spark method of spark distribution. The Crankshaft Position (CKP)
sensor sends reference pulses to the ECM. The ECM then triggers the EI system ignition coils. Once the ECM triggers
the EI system ignition coils both of the connected spark plugs fire at the same time. One cylinder is on its compression
stroke at the same time that the other is on the exhaust stroke, resulting in lower energy needed to fire the spark plug in
the cylinder on its exhaust stroke.
This leaves the remainder of the high voltage to be used to fire the spark plug in the cylinder on its compression stroke.
Since the CKP sensor is in a fixed position, timing adjustments are not possible or needed.
Page 195 of 2053
1F1 -- 32 M162 ENGINE CONTROLS
D AEW OO M Y_2000
KNOCK SENSOR (KS)
YAA1F320
The Knock Sensor (KS) detects abnormal knocking in the engine. The two KS are mounted in the engine block near
the cylinders. The sensors produce an output voltage which increases with the severity of the knock. This signal is sent
to the Engine Control Module (ECM) via a shielded cable. The ECM then adjusts the ignition timing to reduce the spark
knock.