Daewoo Matiz (2003 year). Manual - part 7

SOHC ENGINE MECANICAL 1B – 11

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

Item

ÁÁÁÁÁÁÁÁ

Specified value

ÁÁÁÁÁ

Intake

0.15

0.02

(0.0059

0.0008)

ÁÁÁÁÁ

Valve

Cold

Exhaust

0.32

0.02

(0.0126

0.0008)

ÁÁÁÁÁ

Valve

Clearance

Intake

0.25

0.02

(0.0098

0.0008)

ÁÁÁÁÁ

Hot

Exhaust

0.42

0.02

(0.0165

0.0008)

8. When adjusting the valve clearance, loosen the ad-

just 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 pro-
cedures:

1. Warm up the engine to the normal operating tempera-

ture.

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 connec-

tor 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

Item

ÁÁÁÁÁÁÁÁÁ

Specified Value

ÁÁÁÁÁÁÁÁÁ

Ignition timing – 950rpm

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

D102B310

5. If the ignition timing exceeds the specified value,

loosen the distributor bolts and adjust it to the speci-
fied 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

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 tim-

ing 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 N

m (11–17 lb-ft).

D12B319A

6. Install all removed parts.

SECTION 1D

ENGINE COOLING

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

1D-2

. . . . . . . . . . . . . . . . . .

General Description

1D-2

. . . . . . . . . . . . . . . . . . . . . . .

Radiator

1D-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Surge Tank

1D-2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Coolant Pump

1D-3

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thermostat

1D-3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electric Cooling Fan

1D-3

. . . . . . . . . . . . . . . . . . . . . . .

Engine Coolant Temperature Sensor

1D-4

. . . . . . . . .

Coolant Temperature Sensor

1D-4

. . . . . . . . . . . . . . . .

Component Locator

1D-5

. . . . . . . . . . . . . . . . . . . . . . . .

Coolant Hose and Components

1D-5

. . . . . . . . . . . . .

Radiator/Fan

1D-6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Diagnostic Information and Procedure

1D-7

. . . . . . .

Coolant Leaks Test

1D-7

. . . . . . . . . . . . . . . . . . . . . . . .

Surge Tank Cap Test

1D-7

. . . . . . . . . . . . . . . . . . . . . . .

Thermostat Test

1D-7

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Cooling System Diagnosis

1D-8

. . . . . . . . . . . . . . . . . .

Repair Instructions

1D-9

. . . . . . . . . . . . . . . . . . . . . . . . .

On-Vehicle Service

1D-9

. . . . . . . . . . . . . . . . . . . . . . . . . .

Draining and Refilling the Cooling System

1D-9

. . . .

Surge Tank

1D-10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electric Cooling Fan

1D-11

. . . . . . . . . . . . . . . . . . . . . .

Radiator

1D-11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Thermostat (Typical)

1D-12

. . . . . . . . . . . . . . . . . . . . . .

Thermostat (Euro III)

1D-13

. . . . . . . . . . . . . . . . . . . . . .

Coolant Temperature Sensor

1D-14

. . . . . . . . . . . . . . .

Engine Coolant Temperature Sensor

1D-15

. . . . . . . .

Coolant Pump

1D-15

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Specifications

1D-17

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

General Specifications

1D-17

. . . . . . . . . . . . . . . . . . . .

Fastener Tightening Specifications

1D-18

. . . . . . . . . .

Content .. 5 6 7 8 ..