Engine diagram Daewoo matiz

Answer 1

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.