2003 DAEWOO MATIZ engine

2E –8 TIRES AND WHEELS
DAEWOO M-150 BL2
D16A503A
90–11 0 Nm
Installation Procedure
Notice: Before installing the wheels, remove any build-
up of corrosion on the wheel mounting surface and the
brake drum or the rotor mounting surface by scraping
and brushing them with a wire brush. Installing the
wheels without good metal-to-metal contact at the
mounting surfaces can cause the wheel nuts to loosen,
which can later allow a wheel to come off while the ve-
hicle is moving. Wheel nuts must be tightened in se-
quence and to the proper torque to avoid bending the
wheel, the brake drum or the rotor.
1. Mount the wheel.
2. Install the wheel nuts in the diagonally. Do not tighten
the wheel nuts.
3. Lower the vehicle.
Tighten
Tighten the wheel nuts to 90–110 Nm (66–81 lb-ft).
ON-VEHICLE BALANCING
On-vehicle balancing will help correct vibrations due to
brake drum, rotor, and wheel cover imbalances.
Notice: Do not allow the front suspension to hang free.
When the drive axle is run at an extreme angle, extra
vibrations can occur, as well as damage to seals and
joints.
1. During on-vehicle balancing, do not remove the bal-
ance weights from the off-vehicle dynamic balance.
2. If more than 1 ounce of additional weight is required,
split the weight between the inner and the outer rim
flanges.
3. Spin the driven tire and wheel assemblies using the
engine.
OFF-VEHICLE BALANCING
Perform wheel balancing with an electronic off-vehicle
balancer. The balancer is easy to use and gives both a
static and a dynamic balance. Unlike on-vehicle balanc-
ing, the off-vehicle balancer does not correct for drum or
rotor imbalance. This drawback is overcome by its accu-
racy. Secure the wheel on the balancer with a cone
through the back side of the centerhole, not through the
wheel nut holes.
CORRECTING NON-UNIFORM TIRES
There are two ways to correct properly balanced tires
which still vibrate. One method uses an automatic
machine which loads the tire and buffs small amounts of
rubber from high spots on the outer two tread rows.
Correction by this method is usually permanent and, if it
is done properly, does not significantly affect the
appearance or the tread life of the tire. Tire truing with a
blade-type machine is not recommended because it
substantially reduces the tread life and often does not
correct the problem permanently.

2E –10 TIRES AND WHEELS
DAEWOO M-150 BL2
SPECIFICATIONS
TIRE SIZE AND PRESSURE SPECIFICATIONS
Inflation Pressure
FrontRearEngineTiresWheelkPapsikPapsi
0.8 SOHC145/70 R134.5Jx13 (Steel)207 (207)*30 (30)*207 (234)*30 (34)*
155/65 R134.5Jx13 (Alloy)207 (207)*30 (30)*207 (234)*30 (34)*
Important: ( )* : 4 – 5 occupants
INFLATION PRESSURE CONVERSION SPECIFICATIONS

kPa

psi

kPapsikPapsi
140

20

186

27

234

34
145

21

193

28

241

35
152

22

200

29

248

36
159

23

207

30

276

40
166

24

214

31

310

45
172

25

221

32

345

50
179

26

228

33

379

55
FASTENER TIGHTENING SPECIFICATIONS
Application Nm Lb-Ft Lb-In
Wheel Nuts (Aluminum Wheel)90 – 11 066 – 81–
Wheel Nuts (Steel Wheel)90 – 11 066 – 81–

4A –4 HYDRAULIC BRAKES
DAEWOO M-150 BL2
DIAGNOSITIC INFORMATION AND PROCEDURES
BRAKE SYSTEM TESTING
(Left–Hand Drive Shown, Right–Hand
Drive Similar)
Brakes should be tested on a dry, clean, reasonably
smooth and level roadway. A true test of brake perfor-
mance cannot be made if the roadway is wet, greasy, or
covered with loose dirt whereby all tires do not grip the
road equally. Testing will also be adversely affected if the
roadway is crowned so as to throw the weight so roughly
that the wheels tend to bounce.
Test the brakes at different vehicle speeds with both light
and heavy pedal pressure; however, avoid locking the
brakes and sliding the tires. Locked brakes and sliding
tires do not indicate brake efficiency since heavily
braked, but turning, wheels will stop the vehicle in less
distance than locked brakes. More tire-to-road friction is
present with a heavily braked, turning tire than with a
sliding tire.
Because of the high deceleration capability, a firmer
pedal may be felt at higher deceleration levels.
There are three major external conditions that affect
brake performance:

Tires having unequal contact and grip of the road will
cause unequal braking. Tires must be equally in-
flated, and the tread pattern of the right and the left
tires must be approximately equal.

Unequal loading of the vehicle can affect the brake
performance since the most heavily loaded wheels
require more braking power, and thus more braking
effort, than the others.

Misalignment of the wheels, particularly conditions of
excessive camber and caster, will cause the brakes
to pull to one side.
To check for brake fluid leaks, hold constant foot pres-
sure on the pedal with the engine running at idle and the
shift lever in NEUTRAL. If the pedal gradually falls away
with the constant pressure, the hydraulic system may be
leaking. Perform a visual check to confirm any sus-
pected leaks.
Check the master cylinder fluid level. While a slight drop
in the reservoir level results from normal lining wear, an
abnormally low level indicates a leak in the system. The
hydraulic system may be leaking either internally or ex-
ternally. Refer to the procedure below to check the mas-
ter cylinder. Also, the system may appear to pass this
test while still having a slight leak. If the fluid level is nor-
mal, check the vacuum booster pushrod length. If an in-
correct pushrod length is found, adjust or replace the
rod.Check the master cylinder using the following proce-
dure:

Check for a cracked master cylinder casting or brake
fluid leaking around the master cylinder. Leaks are in-
dicated only if there is at least one drop of fluid. A
damp condition is not abnormal.

Check for a binding pedal linkage and for an incorrect
pushrod length. If both of these parts are in satisfac-
tory condition, disassemble the master cylinder and
check for an elongated or swollen primary cylinder or
piston seals. If swollen seals are found, substandard
or contaminated brake fluid should be suspected. If
contaminated brake fluid is found, all the components
should be disassembled and cleaned, and all the rub-
ber components should be replaced. All of the pipes
must also be flushed.
Improper brake fluid, or mineral oil or water in the fluid,
may cause the brake fluid to boil or cause deterioration
of the rubber components. If the primary piston cups in
the master cylinder are swollen, then the rubber parts
have deteriorated. This deterioration may also be evi-
denced by swollen wheel cylinder piston seals on the
drum brake wheels.
If rubber deterioration is evident, disassemble all the hy-
draulic parts and wash the parts with alcohol. Dry these
parts with compressed air before reassembly to keep al-
cohol out of the system. Replace all the rubber parts in
the system, including the hoses. Also, when working on
the brake mechanisms, check for fluid on the linings. If
excessive fluid is found, replace the linings.
If the master cylinder piston seals are in satisfactory
condition, check for leaks or excessive heat conditions.
If these conditions are not found, drain the fluid, flush the
master cylinder with brake fluid, refill the master cylin-
der, and bleed the system. Refer to “Manual Bleeding
the Brakes” in this section.
BRAKE HOSE INSPECTION
The hydraulic brake hoses should be inspected at least
twice a year. The brake hose assembly should be
checked for road hazard damage, cracks, chafing of the
outer cover, and for leaks or blisters. Inspect the hoses
for proper routing and mounting. A brake hose that rubs
on a suspension component will wear and eventually
fail. A light and a mirror may be needed for an adequate
inspection. If any of the above conditions are observed
on the brake hose, adjust or replace the hose as neces-
sary.

4A –6 HYDRAULIC BRAKES
DAEWOO M-150 BL2
MANUAL BLEEDING THE BRAKES
Important: The bleeding sequence is as follows; right
rear, left rear, right front, and left front.
Important: Check the fluid level and add the fluid during
the bleeding operation.
1. Raise the vehicle.
2. Remove the bleeder screw and cap.
D17B703B
3. Attach a transparent tube over the valve. Allow the
tube to hang submerged in brake fluid in a transpar-
ent container.
D107A303
4. Slowly push the brake pedal several times and hold
the brake pedal.5. Tighten the bleeder screw after loosening the bleeder
screw and draining the fluid.
Caution: Hold the brake pedal until tightening the
bleeder screw.
6. Repeat the step 5, 6 until all the air is removed.
7. Check the leaks for the bleeder screw.
PEDAL TRAVEL CHECK
1. Start the engine.
2. Push the pedal three times.
3. With brake pedal depressed with a about 30Kg (66.15
lb) load, measure the clearance between the pedal
pad and the lower dash panel.
Unit : mm (in.)

Specification

60 (2.36)
D107A304
4. If clearance is less than 60mm (2.36 in.), the most
possible cause is either rear drum brake shoes are
worn out beyond the specification value or air is in
lines. Clearance still remains less than 60mm (2.36
in.) even after replacement of brake shoes and bleed-
ing of the brake system, other possible but infrequent
cause is malfunction of rear drum brake shoe adjust-
ers or booster push rod length out of adjustment.
5. Automatic clearance adjuster check is performed af-
ter removing brake drums. If the faulty is found, repair
or replace it.

HYDRAULIC BRAKES 4A–11
DAEWOO M-150 BL2
D24D001
3. Remove the stoplamp switch.

Remove the stoplamp switch (1).

Remove the bolts (2).

Remove the stoplamp switch bracket (3).
D24D002
4. Remove the bolts mounting brake pedal bracket (1).
5. Remove the nuts mounting brake pedal bracket (2).
D24D003
6. Remove the canister. Refer to Section 1F, Engine
Controls.
7. Remove the bolt mounting brake pedal bracket in the
engine compartment (1).
D24D004
8. Remove the brake pedal.

Remove the snap rings (1).

Remove the bushings (2).

Remove the brake pedal spring (3).

Remove the cushion (4).

Remove the brake pedal pad (5).

4A –12 HYDRAULIC BRAKES
DAEWOO M-150 BL2
D24D005
Installation Procedure
1. Install the brake pedal with pad, spring, bushings, and
cushion.
2. Install the bolt mounting brake pedal bracket in the
engine compartment.
Tighten
Tighten the bolt to 18–26 Nm (13–20 lb-ft).
3. Install the canister. Refer to Section 1F, Engine Con-
trols.
D24D006
4. Install the brake pedal with the snap rings.
5. Install the bolts and nuts mounting brake pedal brack-
et.
Tighten

Tighten the bolts mounting brake pedal bracket to
18–26 Nm (13–20 lb-ft).

Tighten the nuts mounting brake pedal bracket to
18–26 Nm (13–20 lb-ft).
D24D007
6. Install the stoplamp switch with the bracket and the
bolts.
Tighten
Tighten the mounting bolts to 9–12 Nm (80–106 lb-
in.)
7. Connect the brake pedal rod to the power booster.
Refer to Section 4C, Power Booster.
8. Install the instrument panel assembly. Refer to Sec-
tion 9E, Instrument/Driver Information.

HYDRAULIC BRAKES 4A–13
DAEWOO M-150 BL2
SPECIFICATIONS
GENERAL SPECIFICATIONS
0.8 SOHC Engine
Application Millimeters Inches



Brake Drums:
Inside Diameter
Maximum Rebore Diameter
Out-of-Round


180
182
0.04


7.09
7.17
0.0016




Brake Rotors:
Discard Thickness
Lateral Runout (Installed)
Rotor Diameter
Rotor Thickness (New)



10
0.05
236
12.7




0.4
0.002
9.3
0.5
Master Cylinder:
Bore Diameter 20.64 0.81
Caliper:
Piston Diameter
48

1.89
Wheel Cylinder Diameter: 17.46 0.69



Brake Pedal:
Free Play
Height
Stroke


6 – 10
200
30



0.24 – 0.31
7.87
1.18
Type DOT–3 or DOT–4 Brake Fluid Capacity 0.45 L (0.48 qt.)
FASTENER TIGHTENING SPECIFICATIONS

Application

Nm

Lb-Ft

Lb-In
Brake Pipe Fittings 16 12 –
Front Brake Hose-to-Caliper Bolt 25.5 19.1 –
Brake Pedal–to–Pedal Bracket Hex Bolt

18

13

–
Brake Pedal Bracket Mounting Bolts 18 – 26 13 – 20 –
Brake Pedal Bracket Mounting Nuts 18 – 26 13 – 20 –
Stoplamp Switch Mounting Bracket Bolts

9 – 12

–

80 – 106

4B –4 MASTER CYLINDER
DAEWOO M-150 BL2
REPAIR INSTRUCTIONS
ON–VEHICLE SERVICE
MAB4B001
D107A514
MASTER CYLINDER ASSEMBLY
Removal Procedure
1. Remove the air filter assembly. Refer to Section 1B,
Engine Mechanical.
2. For vehicles with the non–ABS braking system, re-
move the proportioning valve. Refer to “Proportioning
Valve” in this section.
3. Remove the master cylinder.

Disconnect the electrical connector.

Loosen the brake pipe fittings.

Plug the opening in the master cylinder to prevent
fluid loss or contamination.
Notice: Brake fluid may damage paintwork, if spillage
onto paintwork, wash with cold water immediately.

Remove the nuts mounting the master cylinder (3).
D17A515A
Installation Procedure
Important: Use only Daewoo recommended brake
fluid.
1. Install the master cylinder assembly with the nuts.
Tighten
Tighten the attaching nuts to 16 Nm (12 lb-ft).