wheel DAEWOO MATIZ 2003 Service Owner's Guide

SUSPENSION DIAGNOSIS 2A–5
DAEWOO M-150 BL2
Condition Probable Cause Correction
Steering Wheel
Air in the power steering system.
Bleed the power steering system.
Kickback (Power)
A loose steering gear mounting.
Tighten the steering gear mounting
bracket bolts.

Loose connections or wear of the joint
from the steering column to the
intermediate shaft.

Loose connections or wear of the joint
from the intermediate shaft to the
steering gear.
Tighten the coupling pinch bolts.

Replace the intermediate shaft as
needed.

Loose tie rod ends.
Tighten the tie rod ends.

Replace the tie rods as needed.

Loose or worn wheel bearings.
Tighten the drive axle nut.

Replace the wheel bearing as needed.
Steering Wheel Surges
or Jerks (Power)
Low pressure in the power steering
system.
Replace the seals and the hoses as
needed.

A sluggish steering gear valve.
Clean the pinion valve assembly.

Replace the pinion valve assembly as
needed.

A loose power steering pump drive
belt.
Adjust the power steering pump drive
belt.
Cupped Tires
The front–wheel and the rear–wheel
alignment are out–of–align.
Align the front and the rear wheels.

Worn strut dampeners.
Replace the strut dampeners.

Worn or loose wheel bearing.
Tighten the drive axle nut.

Replace the wheel bearings as
needed.

Excessive tire or wheel runout.
Match–mount the tires.

Replace the tires as needed.

Replace the wheels as needed.

A worn ball joints.
Replace the control arm and ball joint
assembly.

The steering gear preload adjustment
is out–of–adjustment.
Perform a rack bearing preload
on–vehicle adjustment.

2A–6 SUSPENSION DIAGNOSIS
DAEWOO M-150 BL2
WHEEL BEARING DIAGNOSIS
This vehicle with non–serviceable bearings in the rear
wheels. If any fault is found with a wheel bearing, it must
be replaced.
Wheel Bearing Noise
A road test usually reveals excessive wheel bearing
noise. Wheel bearings emit a howling sound when loose
or damaged. Wheel bearing noise is present only when
the vehicle is moving. It is constant and unwavering and
increases with the speed of the vehicle. If the wheel
bearing noise cannot be positively diagnosed, or if theorigin of the noise cannot be determined, perform the
following test :
1. Raise and suitably support the vehicle.
2. Spin the wheels using your hand. Check for out–of–
round or out–of–balance tires, bent rims, or loose
wheel bearings.
3. Spin the rear wheels using a commercial wheel spin-
er.
4. If a noise can be heard from the passenger compart-
ment, replace the noisy wheel bearings. Refer to Sec-
tion 2D, Rear Suspension.
5. Lower the vehicle.

DAEWOO M-150 BL2

SECTION 2B
WHEEL ALIGNMENT
TABLE OF CONTENTS
Description and Operation 2B-2. . . . . . . . . . . . . . . . . .
Four Wheel Alignment 2B-2. . . . . . . . . . . . . . . . . . . . .
Toe 2B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Caster 2B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camber 2B-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering Axis Inclination 2B-3. . . . . . . . . . . . . . . . . . . .
Included Angle 2B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scrub Radius 2B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setback 2B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turning Angle 2B-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diagnostic Information and Procedures 2B-4. . . . .
Tire Diagnosis 2B-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Toe Adjustment 2B-5. . . . . . . . . . . . . . . . . . . . . .
Front Camber and Caster Check 2B-5. . . . . . . . . . . .
Rear Camber Check 2B-5. . . . . . . . . . . . . . . . . . . . . . .
Rear Toe Check 2B-5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2B-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Alignment Specifications 2B-6. . . . . . . . . . . . .
Fastener Tightening Specifications 2B-6. . . . . . . . . . .

2B – 2 WHEEL ALIGNMENT
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
FOUR WHEEL ALIGNMENT
The first responsibility of engineering is to design safe
steering and suspension systems. Each component
must be strong enough to withstand and absorb extreme
punishment. Both the steering system and the front and
the rear suspension must function geometrically with the
body mass.
The steering and the suspension systems require that
the front wheels self-return and that the tire rolling effort
and the road friction be held to a negligible force in order
to allow the customer to direct the vehicle with the least
effort and the most comfort.
A complete wheel alignment check should include mea-
surements of the rear toe and camber.
Four-wheel alignment assures that all four wheels will be
running in precisely the same direction.
When the vehicle is geometrically aligned, fuel economy
and tire life are at their peak, and steering and perfor-
mance are maximized.
TOE
D16A006A
Toe–in is the turning in of the tires, while toe–out is the
turning out of the tires from the geometric centerline or
thrust line. The toe ensures parallel rolling of the wheels.
The toe serves to offset the small deflections of the
wheel support system which occur when the vehicle is
rolling forward. The specified toe angle is the setting
which achieves–degrees (0
) of toe when the vehicle is
moving.
Incorrect toe-in or toe-out will cause tire wear and re-
duced fuel economy. As the individual steering and sus-
pension components wear from vehicle mileage,
additional toe will be needed to compensate for the
wear.
Always correct the toe dimension last.
CASTER
D16A008A
Caster is the tilting of the uppermost point of the steering
axis either forward or backward from the vertical when
viewed from the side of the vehicle. A backward tilt is
positive, and a forward tilt is negative. Caster influences
directional control of the steering but does not affect tire
wear. Weak springs or overloading a vehicle will affect
caster. One wheel with more positive caster will pull to-
ward the center of the car. This condition will cause the
car to move or lean toward the side with the least
amount of positive caster. Caster is measured in de-
grees and is not adjustable.
CAMBER
D16A007A
Camber is the tilting of the top of the tire from the vertical
when viewed from the front of the vehicle. When the
tires tilt outward, the camber is positive. When the tires
tilt inward, the camber is negative. The camber angle is
measured in degrees from the vertical. Camber in-
fluences both directional control and tire wear.
If the vehicle has too much positive camber, the outside
shoulder of the tire will wear. If the vehicle has too much
negative camber, the inside shoulder of the tire will wear.
Camber is measured in degrees and is not adjustable.

WHEEL ALIGNMENT 2B–3
DAEWOO M-150 BL2
STEERING AXIS INCLINATION
Steering Axis Inclination (SAI) is the tilt at the top of the
steering knuckle from the vertical. Measure the SAI
angle from the true vertical to a line through the center of
the strut and the lower ball joint as viewed from the front
of the vehicle.
SAI helps the vehicle track straight down the road and
assists the wheel back into the straight ahead position.
SAI on front wheel drive vehicles should be negative.
INCLUDED ANGLE
The included angle is the angle measured from the cam-
ber angle to the line through the center of the strut and
the lower ball joints as viewed from the front of the ve-
hicle.
The included angle is calculated in degrees Most align-
ment racks will not measure the included angle directly.
To determine the included angle, subtract the negativeor add the positive camber readings to the Steering Axis
Inclination (SAI).
SCRUB RADIUS
The scrub radius is the distance between true vertical
and the line through the center of the strut and lower ball
joint to the road surface. Scrub radius is bulit into the de-
sign of the vehicle. Scrub radius is not adjustable.
SETBACK
The setback is the distance in which one front hub and
bearing assembly may be rearward of the other front
hub and bearing assembly. Setback is primarily caused
by a road hazard or vehicle collision.
TURNING ANGLE
The turning angle is the angle of each front wheel to the
vertical when the vehicle is making a turn.

2B–4 WHEEL ALIGNMENT
DAEWOO M-150 BL2
DIAGNOSTIC INFORMATION AND PROCEDURES
TIRE DIAGNOSIS

Condition

Probable cause

Correction
Irregular and Excessive
Tire WearIncorrect inflation pressure.Inflate the tires to the proper
pressure.
Inbalanced wheel.Balance the wheel.
Replace the wheel.
A lack of regular rotation.Rotate the tires.
Incorrect alignment.Align the front and rear wheels.
Premature Tire WearExcessive inflation pressure.Inflate the tires to the proper
pressure.
High speed driving with the low
inflation pressure.Inflate the tires to the proper
pressure.
Uneven BrakingInbalanced inflation pressure.Inflate the tires to the proper
pressure.
Irregular tire wear.Replace the tires.
Noise and Vibration of
The BodyLow inflation pressure.Inflate the tires to the proper
pressure.
Inbalanced wheel.Balance the wheel.
Replace the wheel.
Damaged wheel or tire.Replace the wheel and the tire.
Irregular tire wear.Replace the tire.
Vibration of The SteeringIrregular tire wear.Replace the tire.
WheelInbalanced inflation pressure.Inflate the tires to the proper
pressure.
Damaged tire.Replace the tire.
Bent or damaged wheel.Replace the wheel.

WHEEL ALIGNMENT 2B–5
DAEWOO M-150 BL2
FRONT TOE ADJUSTMENT
1. Separate the clamps from the both rack and pinion
boots.
2. Loosen the right and the left tie rod end lock nuts.
3. Turn the right and the left tie rod to align the toe.
In this adjustment, the right and left tie rods must be
equal in length.
Front Toe–In 10′ ± 10′

Rotation Number of Tie Rod

Difference of Toe–In

1/2
0.75 mm (0.03 in.)
1 1.5 mm (0.06 in.)
D106A303
4. Tighten the tie rod end lock nut to 45 Nm (33 lb-ft).
5. Install the rack and pinion boots clamp.
FRONT CAMBER AND CASTER
CHECK
The front camber and caster are not adjustable. Refer to
“Wheel Alignment Specifications” in this section. Jounce
the bumper three times before measuring the camber or
the caster in order to prevent an incorrect reading. If the
front camber or caster measurements deviate from the
specifications, locate and replace or repair any dam-
aged, loose, bent, dented, or worn suspension part. If
the problem is body related, repair the body.
REAR CAMBER CHECK
The rear camber is not adjustable. Refer to “Wheel
Alignment Specifications” in this section. If the rear cam-
ber deviates from the specification, locate the cause and
correct it. If damaged, loose, bent, dented, or worn sus-
pension parts are found, they should be repaired or re-
placed. If the problem is body related, repair the body.
REAR TOE CHECK
The rear toe is not adjustable. Refer to “Wheel Align-
ment Specifications” in this section. If the toe deviates
from the specification, check the rear axle assembly and
the wheel spindle on vehicles without an anti–lock brak-
ing system (ABS) or the rear axle assembly and the hub
and bearing assembly on vehicles with ABS for possible
damage.

2B–6 WHEEL ALIGNMENT
DAEWOO M-150 BL2
SPECIFICATIONS
WHEEL ALIGNMENT SPECIFICATIONS

Application

Front

Rear
Camber0
30′ ± 0
30′0

20′
Caster–Manual Steering2
48′ ± 30′–
Caster–Power Steering2
48′ ± 30′–
To e–in (2–person load)10′ ± 10′20′
20′
FASTENER TIGHTENING SPECIFICATIONS
Application Nm Lb-Ft Lb-In Tie Rod End Lock Nut 45 33 –

DAEWOO M-150 BL2
SECTION 2C
FRONT SUSPENSION
TABLE OF CONTENTS
Description and Operation 2C-2. . . . . . . . . . . . . . . . . .
Front Suspension 2C-2. . . . . . . . . . . . . . . . . . . . . . . . .
Component Locator 2C-3. . . . . . . . . . . . . . . . . . . . . . . .
Front Suspension 2C-3. . . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Information and Procedures 2C-5. . . . .
Strut Dampener 2C-5. . . . . . . . . . . . . . . . . . . . . . . . . . .
Ball Joint and Knuckle 2C-5. . . . . . . . . . . . . . . . . . . . .
Front Wheel Bearing 2C-6. . . . . . . . . . . . . . . . . . . . . . .
Repair Instructions 2C-7. . . . . . . . . . . . . . . . . . . . . . . . .
On-Vehicle Service 2C-7. . . . . . . . . . . . . . . . . . . . . . . . . .
Strut Assembly 2C-7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Knuckle Assembly 2C-8. . . . . . . . . . . . . . . . . . . . . . . . . Front Longitudinal Frame and
Stabilizer Shaft 2C-10. . . . . . . . . . . . . . . . . . . . . . . . .
Control Arm 2C-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Strut Bar 2C-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crossmember 2C-13. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Repair 2C-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hub, Bearing and Knuckle 2C-16. . . . . . . . . . . . . . . . .
Front Strut 2C-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2C-23. . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Specifications 2C-23. . . . . . . . . . . . . . . . . . . .
Fastener Tightening Specifications 2C-23. . . . . . . . . .
Special Tools and Equipment 2C-24. . . . . . . . . . . . . .
Special Tools Table 2C-24. . . . . . . . . . . . . . . . . . . . . . .

2C – 2 FRONT SUSPENSION
DAEWOO M-150 BL2
DESCRIPTION AND OPERATION
FRONT SUSPENSION
The front suspension for this vehicle is a combination
knuckle/strut and spring design.
The control arms pivot from the body. The lower control
arm pivots use rubber bushing. The upper end of the
strut is isolated by a rubber mount and contains a bear-
ing to allow the wheel to turn.
The lower end of the steering knuckle pivots on a ball
joint bolted to the control arm. The ball joint is fastened
to the steering knuckle with a bolt.When servicing the control arm-to-body attachment and
the stabilizer shaft-to-body insulators, make sure the at-
taching bolts are loose until the control arms are moved
to the trim height, which is curb height. Trim height is the
normal position to which the control arms move when
the vehicle is sitting on the ground. Refer to “General
Specifications” in this section.