2003 DAEWOO MATIZ tire pressure

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.

6C –6 POWER STEERING GEAR
DAEWOO M-150 BL2
REPAIR INSTRUCTIONS
ON–VEHICLE SERVICE
RACK AND PINION ASSEMBLY
(Left–Hand Drive Shown, Right–Hand
Drive Similar)
Removal Procedure
1. Remove the intermediate shaft lower pinch bolt. Re-
fer to Section 6E, Steering Wheel and Column.
2. Remove the wheel. Refer to Section 2E, Tires and
Wheels.
3. Remove the tie rod ends. Refer to Section 6D, Manu-
al Steering Gear.
4. Remove the front exhaust pipe nuts. Refer to Section
1G, Engine Exhaust.
D105C534
5. Remove the rack and pinion assembly.

Disconnect the return line pipe from the steering
gear (1).

Disconnect the pressure inlet line pipe from the
steering gear (2).

Plug the opening in the power steering pipe line to
prevent fluid loss and contamination.
D105C535

Remove the power steering gear retaining bracket
tighten bolts (3).

Remove the power steering gear retaining bracket
(4).
Important: After moving the gear toward the passenger
side and pulling the gear of the driver side into the un-
derbody hole, remove the steering gear.

POWER STEERING GEAR 6C–13
DAEWOO M-150 BL2
SPECIFICATIONS
GENERAL SPECIFICATIONS
ApplicationDescription
Power Steering FluidPower Steering Fluid DEXRON-II or DEXRON-III
Capacity1.0 L (1.056 qt)
TypeRack and Pinion
Overall Gear Ratio15.7 : 1
Power Steering Angle144, 155Inside39.5± 2
TireOutside33.5± 2
175 TireInside34.9± 2
Outside30.5± 2
GreaseRackPOLYUREAS
Ball JointSYNTHETICS OILS & LI SOAPS
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNmLb-FtLb-In
Power Steering Gear Bracket Bolt50–5536–41–
Power Steering Gear Pinion Nut40–5030–36–
Power Steering Gear Pinion Dust Cover45–5533–41–
Power Steering Gear Pressure Line Fitting25–3518–25–
Power Steering Oil Pressure Pipe Fitting (Gear Side)21–3516–25–
Power Steering Gear Ajuster PlugRefer to “DIAGNOSIS” in this section.

6D –6 MANUAL STEERING GEAR
DAEWOO M-150 BL2
STEERING WHEEL RESTORATION
1. Turn the steering wheel fast to the right and left and
turn it slowly as the same way.
2. Check if the steering wheel restoration for the wheel
turning to right and the one to the left are same.
3. Turn the steering wheel to 90 about 1–2 seconds
and loosen the steering wheel during the low speed
driving.
4. If the steering wheel restores above 70%, the steer-
ing wheel restoration is OK.
5. If the restoration is poor, check the tire pressure,
steering gear preload, and steering gear operation.
And repair the fault.
CHECK THE TURNING RESISTANCE
OF THE TIE ROD END OR TIE ROD
1. Turn the ball joint of the tie rod end or the tie rod about
10 times.
2. Use a spring balance to check the turning resistance
of each ball joint.
D105B302
Application Specified Value
Tie Rod End Ball Joint0.49 – 3.43 Nm
(4.5 – 30 lb-in.)

Tie Rod Ball Joint0.49 – 3.43 Nm
(4.5 – 30 lb-in.)
3. If the values exceed the specified values, replace the
tie rod end or the tie rod.
4. But, If the ball joint of the tie rod end or the tie rod falls
down of itself, replace it.
ADJUST THE FREE LOAD OF THE
STEERING GEAR
1. Place the steering wheel in the straight–ahead posi-
tion.
2. Raise and suitably support the vehicle.
3. Check the torque of the adjuster plug.
4 When the measured torque is below the specification
value or the measured torque is over the specification
value, adjust the tightening torque.

Place the rack gear in the straight–ahead position.

Tighten the adjust plug to 95 Nm (70 lb-ft).

Turn the steering wheel all the way to the right and
the left about 5 times repeatedly.

Place the rack gear in the straight–ahead position.

Loosen the adjust plug.

Tighten the adjust plug to 8 Nm (71 lb-in.).

Set the torque in the 0.8–1.3 Nm (8–12 lb-in.) by
loosening the adjust plug to 0 − 90.
D105B303

9I – 2 WATERLEAKS
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURES
WATERLEAK DIAGNOSIS
The repair of waterleaks in the body requires proper
testing and diagnosis. Repair waterleaks by adjusting
the misaligned parts and using the proper repair materi-
als. First, determine what conditions cause the leak. For
example, the leak may occur only when the vehicle is
parked on an incline, or water may appear only in the
spare tire compartment. Second, test the area for the
source of the leak using the following testing methods. If
the general leak area is found, determine the exact entry
point of the leak by using a water hose or an air hose. If
the general leak area is not obvious, use the watertest
stands to determine the area of the leak. It may be nec-
essary to remove some interior trim panels or some
parts in order to locate the leaks.
Important: It is necessary to find the origin of all the
leaks before making any repairs. Random repairs may
stop the leak only temporarily and may make future re-
pairs more difficult. Continue localized testing in the gen-
eral area in order to ensure that all leaks are found.
Generalized Testing
1. Set up the watertest stands.
D109A301
1 1/2-inch by 36-inch Pipe
2 Full-jet Spray Nozzle #1/2 GG-25 or Equivalent
Nozzle Height at 1,600 mm to the Floor
3 1/2-inch Coupling
4 1/2-inch by 1/2-inch by 1/4-inch Reducing T
(Right Only)
5 1/2-inch Coupling (Left Only)
6 1/2-inch Cross (Right Only)
7 1/2-inch Tee (Left Only)
8 1/2-inch Pipe-to-Hose Nipple (Right Only)
9 5/8-inch Female Hose Coupling
10 5/8-inch Input Hose (2 Feet Long, Right Only)
11 1/2-inch Close Nipple
12 1/2-inch Cross with Weld-on 1/2-inch Cap
13 1/2-inch by 12-inch Nipple
14 1/2-inch Cap
15 5/8-inch Female Hose Coupling
16 5/8-inch Cross Hose (12 Feet Long)
17 5/8-inch Hose Quick Connect
18 1/2-inch Pipe-to-Hose Nipple
19 1/2-inch by 30-inch Pipe (Straight)
20 1/4-inch Water Pressure Gauge (Right Only)
2. Set up the watertest stand leak test.
D19A302A