Daewoo Matiz 1999 Engine Diagram
DAEWOO M-150 BL2
SECTION 1B
SOHC 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 B unless otherwise
noted.
TABLE OF CONTENTS
Description and Operation . . . . . . . . . . . . . . . . . . 1B-2
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-2
Engine Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . 1B-2
Cylinder Head and Valve Train . . . . . . . . . . . . . . 1B-2
Engine Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-3
Crankshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-3
Connecting Rod . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-3
Piston, Piston Ring and Piston Pin . . . . . . . . . . . 1B-3
Timing Belt and Pulley . . . . . . . . . . . . . . . . . . . . . 1B-4
Engine Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-4
Component Locator . . . . . . . . . . . . . . . . . . . . . . . . 1B-5
Cylinder Head . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-5
Engine Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-6
Manifold & Air Flow System . . . . . . . . . . . . . . . . . 1B-7
Timing Belt & Engine Mount . . . . . . . . . . . . . . . . 1B-8
Diagnostic Information and Procedure . . . . . . . 1B-9
Compression Pressure Check . . . . . . . . . . . . . . . 1B-9
Oil Pressure Check . . . . . . . . . . . . . . . . . . . . . . . . 1B-9
Adjustment of Valve Clearance . . . . . . . . . . . . . 1B-10
Ignition Timing Check and Adjustment
(Typical) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-11
Valve Timing Check and Adjustment . . . . . . . . 1B-12
Repair Instructions . . . . . . . . . . . . . . . . . . . . . . . . 1B-14
On-Vehicle Service . . . . . . . . . . . . . . . . . . . . . . . . . 1B-14
Air Filter Assembly . . . . . . . . . . . . . . . . . . . . . . . 1B-14
Air Filter Element . . . . . . . . . . . . . . . . . . . . . . . . . 1B-15
Positive Crankcase Ventilation (PCV) Hose
and Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-15
Intake Manifold . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-16
Exhaust Manifold (Typical) . . . . . . . . . . . . . . . . . 1B-18
Exhaust Manifold (Euro III) . . . . . . . . . . . . . . . . 1B-20
Timing Belt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-21
Oil Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-23
Oil Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-24
Distributor Case . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-26
Cylinder Head and Gasket . . . . . . . . . . . . . . . . . 1B-28
Engine Mount Damping Block . . . . . . . . . . . . . . 1B-32
Engine Mount Front Damping Bush . . . . . . . . . 1B-34
Engine Assembly . . . . . . . . . . . . . . . . . . . . . . . . . 1B-35
Unit Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-47
Cylinder Head and Valve Train
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-47
Engine Block Components . . . . . . . . . . . . . . . . . 1B-59
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-71
Engine Specifications . . . . . . . . . . . . . . . . . . . . . 1B-71
Fastener Tightening Specifications . . . . . . . . . . 1B-73
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1B-75
Special Tools Table . . . . . . . . . . . . . . . . . . . . . . . 1B-75
1B - 2 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
ENGINE TYPE
The engine is 4-cycle, water-cooled, in-line 3 cylinders
with displacement of 796cc (68.5×72.0mm) (2.70×
2.83 in.).
Engine model
(Specifications)
F8C Type SOHC /
2 Valve (MPI)
Maximum power (kw/rpm) 37.5 / 6,000
Maximum torque (Nm/rpm) 68.6 / 4,600
Compression ratio 9.3 : 1
D102B001
ENGINE LUBRICATION
The engine lubrication is of the wetsump method to draw
up the oil forced by the oil pump. The oil pump is of a
trochoid type, and mounted on crankshaft at crankshaft
pulley side (a). Oil is drawn up through oil pump pickup
tube (b) and passed through pump (c) to oil filter (d). The
filtered oil flows into two paths in engine block. In one
path (e), oil reaches crankshaft journal bearings. Oil
from crankshaft journal bearings is supplied to connecting
rod bearings by means of intersecting passages
drilled in crankshaft, and then injected from a small hole
provided on big end of connecting rod to lubricate piston
(f), rings, and cylinder wall. In another path (g), oil goes
up to cylinder head and lubricates rocker arm (i), valve
(j), camshaft (k), etc. through the oil hole provided on the
rocker arm shaft (h).
D102B002
CYLINDER HEAD AND VALVE TRAIN
The cylinder head is made of cast aluminum alloy for
better strength in hardness with lightweight, and camshaft
(k) and rocker arm shaft (h) arranged in-line support.
D102B003
The combustion chambers are formed into the manifold
combustion chambers with increased squish parts for
better combustion efficiency and its intake and exhaust
SOHC ENGINE MECANICAL 1B- 3
DAEWOO M-150 BL2
parts are installed in the cross flow arrangement. The
rocker arm (i) operates in seesaw motion to close and
open the intake and exhaust valves (j) with camshaft by
turning the rocker arm shaft of each intake and exhaust
part.
ENGINE BLOCK
As the largest part of the engine components. the block
(l) has all the necessary parts attached to outer surface
of it.
On the inside surface of block, there are bore surfaces
by horning, which are cylinders, and on the periphery of
the cylinders, there are the passages to prevent the
over-heated and to lubricate the engine block.
CRANKSHAFT
The crankshaft (m) is to convert the rectilinear motion
into the rotation motion through the connecting rod (n)
which transmits the power generated by combustion.
On the one side of it, oil pump, crankshaft pulley and
timing belt pulley are attached, and oil seal housing and
flywheel are on the other side.
A special steel of high grade cast iron is used for the material
to stand the bending load and distortion. The material
of the main bearing (o) is aluminum alloy. The split
thrust bearings (p) are inserted in the journal bearing
part (No.3).
D102B004
CONNECTING ROD
The connecting rods (n) are made of forged steel, and
its section is typed "I" with its big end connected to
crankshaft (m) and its small end to piston pin to transmit
the power.
The big end is detachable, and its upper and lower parts
are fastened by bolting after the metal bearings (q) are
inserted.
PISTON, PISTON RING AND PISTON
PIN
Piston
The piston (r) is of the open skirt type and its crown is
exposed in the combustion chamber to generate power.
Its land and skirt parts are made of coat aluminum alloy
which is light and has excellent heat conductivity in order
to meet its continuous and high speed reciprocation
movement.
Piston Ring
It is composed of two compression rings (s) and one oil
ring (t) and installed between the grooves of the piston
to make the high speed reciprocating movement maintaining
a remarkable air tightness as well as cylinders. It
is a critical parts to affect the compression pressure, oil
consumption, compression, blow by pressure and engine
performance.
Piston Pin
The pin (u) is not fixed to the piston or connecting rod
and its both ends are assembled by the circlip (v) in the
full floating type. The pin is used to transmit the power
from the crown part of piston to connecting rod.
D102B005
1B -4 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
TIMING BELT AND PULLEY
The timing belt connects the camshaft timing pulley (w)
and the crankshaft timing pulley (x). The timing belt
coordinates the crankshaft and the camshaft and keeps
them synchronized. The timing belt also turns the coolant
pump (y). The timing belt and the pulleys are toothed
so that there is no slippage between them. There is a
tension pulley (z) that maintains the correct timing belt
tension. The timing belt is made of a tough reinforced
rubber similar to that used on the serpentine drive belt.
The timing belt requires no lubrication.
D102B006
ENGINE MOUNT
This is to absorb or reduce the engine vibration and impact
from the wheeled road. Engine mount is attached to
the engine-front side, the engine-right side and the engine-
rear side and one transaxle mount is attached to
the transaxle side.
D102B007
D102B008
SOHC ENGINE MECANICAL 1B- 5
DAEWOO M-150 BL2
COMPONENT LOCATOR
CYLINDER HEAD
D12B4011
1 Oil Filler Cap
2 Cylinder Head Cover
3 Cylinder Head Cover (Euro III)
4 Distributor Case
5 Camshaft
6 Exhaust Rocker Arm
7 Cylinder Head Gasket
8 Cylinder Head
9 Intake Rocker Arm
10 Exhaust Valve
11 Intake Valve
1B -6 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
ENGINE BLOCK
D21B0011
1 Oil Level Gauge Stick
2 Piston
3 Connecting Rod
4 Engine Block
5 Oil Filter
6 Flywheel
7 Crankshaft
8 Oil Pan
9 Oil Pump Strainer
10 Oil Pump Assembly
SOHC ENGINE MECANICAL 1B- 7
DAEWOO M-150 BL2
MANIFOLD & AIR FLOW SYSTEM
D21B0021
1 Intake Manifold
2 Exhaust Gas Recirculation (EGR) Pipe
3 Exhaust Gas Recirculation (EGR) Valve and
Solenoid
4 Throttle Body Assembly
5 Air Filter Assembly
6 Resonator
7 Snorkel
8 Oxygen Sensor
9 Exhaust Manifold
10 Exhaust Manifold Heat Shield
11 Exhaust Manifold Heat Shield (Euro III)
12 Exhaust Manifold (Euro III)
1B -8 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
TIMING BELT & ENGINE MOUNT
D12B4041
1 Engine Mount Damping Block
2 Engine Mount Intermediate Bracket
3 Engine Mount Brace Bracket
4 Transaxle Mount Bracket
5 Transaxle Mount Damping Block
6 Engine Mount Front Bracket
7 Engine Mount Front Damping Bush
8 Timing Belt
9 Timing Belt Tensioner
10 Crankshaft Gear
11 Timing Belt Upper Front Cover
12 Timing Belt Lower Front Cover
13 Crankshaft Pulley
14 Engine Mount Lower Bracket
15 Engine Mount Upper Bracket
SOHC ENGINE MECANICAL 1B- 9
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURE
COMPRESSION PRESSURE CHECK
Tools Required
09915-64510 Compression Pressure Gauge
Check the compression pressure in the following procedures:
1. Warm up the engine to the normal operating temperature
(Cooling temperature : 80-90C (176-194F)).
2. Stop the engine and then remove the high tension
cable and the spark plug.
3. Disconnect the distributor optical sensor connector.
4. Install the compression pressure gauge 09915-64510
(a) in the hole of spark plug.
D12B301A
5. Disengage the clutch in Neutral (to lighten starting
load on engine upon cranking), and depress the accelerator
all the way to make the throttle fully open.
6. Crank the engine with the starting motor, and read the
highest pressure on the compression pressure gauge.
The difference of measured value between cylinders
is 98.06kPa (14.22 psi) and less.
On checking, make the connection perfectly airtight
between the hole of spark plug and compression pressure
gauge.
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
Unit ÁÁÁÁÁ
ÁÁÁÁÁ
StandardÁÁÁÁÁ
ÁÁÁÁÁ
Limit
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Compression
Pressure
- 400 rpm kPa(psi) 1,225.75
(177.73)
1,176.72-
1,274.78
(170.62-
184.84)
7. After checking, remove the gauge and install the removed
parts.
OIL PRESSURE CHECK
Tools Required
09915-77310 Oil Pressure Gauge
Prior to check oil pressure, check the followings:
Check oil level and add if required.
Replace the discolored, deteriorated or diluted oil.
Check any oil leakage and repair the defective parts.
Check the compression pressure in the following procedures:
1. Remove the oil pressure switch (b) from the cylinder
block.
2. Install the oil pressure gauge 09915-77310 (c) to the
mounting place of the oil pressure switch.
D12B302A
3. Start the engine and warm up to the normal operating
temperature.
4. Raise the engine speed up to 2,000rpm and then
read oil pressure.
ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ Item
ÁÁÁÁ
ÁÁÁÁ Unit
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ Standard
Oil Pressure - 2000rpm kPa
(psi)
245.15-294.18
(35.55-42.66)
5. After checking, wrap the threads of oil pressure
switch with a seal tape and tighten it to the specified
torque 12-16 Nm (106-144 lb-in).
6. Start the engine and check oil pressure switch for oil
leakage.
1B -10 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
ADJUSTMENT OF VALVE
CLEARANCE
Adjust the valve clearance in the following procedures:
1. Remove the air filter/resonator assembly and the
relevant parts installed on the cylinder head cover.
2. Remove the cylinder head cover hexagon bolts and
remove the cover.
3. Turn over the crankshaft to make No.1 cylinder
matched with the compression top dead center.
(When the camshaft sprocket notch (d) is aligned with
the timing belt rear cover triangle pointer (e) and the
crankshaft sprocket point (f) is aligned with the oil
pump housing point (g), the compression top dead
center is on the ignition sequence for No. 1 cylinder.)
D102B303
4. Check the valve clearance for No. 1 cylinder compression
top dead center.
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Condition
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
Cylinder
No.
ÁÁÁ
ÁÁÁ
ÁÁÁ
1
ÁÁÁ
ÁÁÁ
ÁÁÁ
2
ÁÁÁ
ÁÁÁ
ÁÁÁ
3
ÁÁÁÁÁÁÁ
Compression top Intake
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
dead center of
No.1 cylinder Exhaust
marks indicates the place where the valve clearance
can be checked and adjusted.
5. If the checking for the valve clearance of No.1 cylinder
compression top dead center is over, position
No.1 cylinder on the exhaust top dead center as rotating
the crankshaft in a 360-degree arc. (When the
camshaft sprocket point (h) is aligned with the timing
belt rear cover triangle pointer (e), the exhaust top
dead center is on the ignition sequence for No. 1 cylinder.)
D102B304
6. Check the valve clearance for the No. 1 cylinder exhaust
top dead center.
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Condition
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
Cylinder
No.
ÁÁÁ
ÁÁÁ
ÁÁÁ
1
ÁÁÁÁ
ÁÁÁÁ
ÁÁÁÁ
2
ÁÁÁ
ÁÁÁ
ÁÁÁ
3
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Exhaust top dead Intake
ÁÁÁÁÁÁÁ
center of No.1
cylinder Exhaust
marks indicates the place where the valve clearance
can be checked and adjusted.
Check and adjust the valve clearance (i) using thickness
gauge (j).
D102B305
D102B306
SOHC ENGINE MECANICAL 1B- 11
DAEWOO M-150 BL2
The measured value of valve clearance should meet the
specified value. If not, adjust the valve clearance.
Important: In case of hot engine, warm up the engine
until the electric cooling fan begins to work and stop the
engine to adjust the clearance with 20-30 minutes there
from.
Unit : mm (in.)
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
Item ÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁ
Specified value
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
Intake
0.15±0.02
(0.0059±0.0008)
ÁÁÁÁÁ
ÁÁVÁalvÁe Á
Cold
Exhaust
0.32±0.02
(0.0126±0.0008)
ÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
Valve
Clearance
Intake
0.25±0.02
(0.0098±0.0008)
ÁÁÁÁÁ
ÁÁÁÁÁ
Hot
Exhaust
0.42±0.02
(0.0165±0.0008)
8. When adjusting the valve clearance, loosen the adjust
nut (k) and then tighten or loosen the adjust rod (l)
properly.
D102B307
IGNITION TIMING CHECK AND
ADJUSTMENT (TYPICAL)
Note: Ignition timing could not be adjusted for Direct
Ignition System (Euro Stage III).
Check and adjust the ignition timing in the following procedures:
1. Warm up the engine to the normal operating temperature.
2. Turn off the lamp and audio system and shift the shift
gear lever in Neutral.
D12B3081
3. Connect terminal A and terminal C of ALDL connector
using the wire (m) or connect the scan tool (n) with
ALDL connector.
4. Connect the timing light (o) with No. 1 cylinder high
tension cable and check the specified value for the
ignition timing, flashing notch on the crankshaft
pulley.
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
Item ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
Specified Value
ÁIÁgnitÁion ÁtimiÁng Á- 95Á0rpÁmÁ 10 BTDC
Important: In flashing the timing light, if crankshaft
pulley notch (p) is matched with the mark (10) for timing
check, the ignition timing is 10 BTDC.
D102B309
1B -12 SOHC ENGINE MECANICAL
DAEWOO M-150 BL2
D102B310
5. If the ignition timing exceeds the specified value,
loosen the distributor bolts and adjust it to the specified
ignition timing by turning the distributor body (s).
D102B311
VALVE TIMING CHECK AND
ADJUSTMENT
Check the valve timing in the following procedures:
1. After removing the high headlamp, loosen the bolts
(a) and remove the timing belt front upper cover (b).
D102B312
2. Turning the crankshaft clockwise twice, align the
notch (d) on the crankshaft pulley (c) with the mark 0
(e) for the timing check on the timing belt front lower
cover.
D102B313
3. Check if the notch (f) on the camshaft sprocket is
aligned with the triangle pointer (g) on the timing belt
rear cover.
Important: Notch (f) should be aligned with pointer (g)
to set the valve timing normally.
D102B314
SOHC ENGINE MECANICAL 1B- 13
DAEWOO M-150 BL2
Adjust the valve timing in the following procedures:
1. Loosen the bolt and remove the timing belt pulley (c).
In loosening the bolt, use the driver (h) in the picture
shown.
D102B315
2. Remove the oil level gauge guide tube (i) and the timing
belt front lower cover (j).
D102B316
3. Remove the timing belt tensioner (k) and the timing
belt (l).
D102B317
4. Using the bolt, turn the crankshaft clockwise to align
the mark (m) on the crankshaft sprocket with the
pointer (n) on the oil pump housing. Then, turn the
camshaft to align the notch (f) with the pointer (g).
D102B318
5. Install the timing belt (l) and the tensioner (k). (Do not
tighten the tensioner bolt completely.)
Turning the crankshaft clockwise twice, align the
mark (m) with the pointer (n) and tighten the tensioner
bolt to 15-23 Nm (11-17 lb-ft).
D12B319A
6. Install all removed parts.
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