Daewoo Nubira. Manual - part 249

SUSPENSION DIAGNOSIS  2A – 5

DAEWOO V–121 BL4

Steering Wheel Kickback

Checks

Action

Inspect for air in the power steering system.

Purge the power steering system of air.

Inspect for a loose steering gear mounting.

Tighten the steering gearmounting bracket nuts and the
bolts.

Inspect the joint from the column to the steering gear for
loose connections or wear.

Tighten the intermediate shaft pinch bolts. Replace the in-
termediate shaft, as needed.

Inspect for loose tie rod ends.

Tighten the tie rod ends. Replace the outer tie rods, as
needed.

Inspect for loose or worn front wheel bearings.

Tighten the drive axle nut. Replace the wheel bearings as
needed.

Steering Wheel Surges or Jerks

Checks

Action

Check the hydraulic system. Test the powersteering sys-
tempressure with a gauge.

Replace the seals and the hoses, as needed.

Inspect fora sluggish steering gear valve.

Clean the pinion valve assembly. Replace the pinion valve
assembly, as needed.

Inspect fora loose powersteering pump serpentine belt.

Adjust the power steering pump serpentine belt.

Cupped Tires

Checks

Action

Check the front–wheel and the rear–wheel alignment.

Align the front and the rear wheels.

Inspect for worn strut dampeners.

Replace the strut dampeners.

Inspect for worn or loose wheel bearings.

Tighten the drive axle nut. Replace the wheel bearings as
needed.

Inspect for excessive tire or wheel runout.

 Match–mount the tires. Replace the tires, as needed. Re-
place the wheels, as needed.

Inspect for a worn ball joint.

Replace the ball joint.

Check the steering gear preload adjustment.

Perform a rack bearing preload adjustment.

TORQUE STEER

A degree of torque steer to the right may be experienced
during the use of heavy throttle on some front–wheel drive
cars with drive axles of unequal length. This torque steer
to the right results from the right drive axle being longer
than the left drive axle, which creates a difference in the
drive axle angle. Cars with intermediate shaft assemblies
have axles of almost equal length.

A difference in the drive axle lengths results in more torque
toe–in in the left front wheel. You will notice the torque toe–
in when the vehicle accelerates from a standing start or at
lower speeds.

Inspection Procedure

1.  Place a small piece of tape at the top center of the

steering wheel.

2.  Note the inches of steering wheel deflection re-

quired to keep the vehicle straight during heavy ac-
celeration.

3.  Compare this finding with similar cars.

Factors that may cause torque steer to be more apparent
on a particular vehicle include:

S

 

Variations in the tire and wheel assemblies. This
has the most significant effect on torque steer. A
slightly smaller diameter on the right front tire will
increase a right torque lead.

S

 

Large differences in the right and the left front tire
pressure.

S

 

Looseness in the control arm bushings, the tie rod
assemblies, or the steering gear mounting. This
looseness permits a front wheel to pull forward and
toe–in under a torque greater than the wheel on the
opposite side. A loose suspension component may
result in an opposite lead upon deceleration.

2A – 6

I

SUSPENSION DIAGNOSIS

DAEWOO V–121 BL4

S

 

A high front trim height. This height would increase
the drive axle angle and could cause wobble at
speeds between 24 to 48 km/h (15 to 30 mph).

S

 

Binding or a tight drive axle joint. A tight drive axle
joint or a high front trim height may also cause a
wobble at speeds between 24 to 48 km/h (15 to 30
mph).

S

 

Incorrect, worn, or loose engine mounts causing
adverse drive angles.

Refer to ”General Diagnosis” in this section for actions to
remedy these problems.

Conditions that may produce an effect similar to torque
steer include:

S

 

Incorrect front or rear alignment.

S

 

Frame misalignment or defect.

S

 

Front suspension damage.

S

 

Incorrectly mounted rear crossmember.

TAPERED ROLLER BEARING

Perform the following test to check for looseness in the
hub and bearing assembly on vehicles equipped with rear
brake drums:

1.  Raise and suitably support the vehicle.
2.  Remove the rear wheel. Refer to Section 2E, Tires

and Wheels.

3.  Remove the brake drum detent screw and the

brake drum. Refer to Section 4E, Rear Drum
Brakes.

4.  Mount a dial indicator set with a magnetic base to a

control arm or any other stationary part of the ve-
hicle.

5.  Install the brake disc caliper and the brake rotor.

Refer to Section 4E, Rear Disc Brakes. Section 2D,
Rear Suspension.

6.  Install the rear brake drum. Refer to Section 4E,

Rear Drum Brakes. 

7.  Install the rear wheel. Refer to Section 2E, Tires

and Wheels.

8.  Lower the vehicle.

TAPERED ROLLER BEARING
(OPTIONAL)

Perform the following test to check for looseness in the
hub and bearing assembly on vehicles equipped with rear
disc brakes:

1.  Raise and suitably support the vehicle.
2.  Remove the rear wheel. Refer to Section 2E, Tires

and Wheels.

3.  Remove the brake disc caliper and the brake rotor.

Refer to Section 4E, Rear Brakes.

4.  Mount a dial indicator set with a magnetic base to a

control arm or any other stationary part of the ve-
hicle.

5.  Push and pull the wheel hub by hand. If the wheel

hub movement exceeds 0.05 mm (0.002 inch), re-
place the wheel bearing. Refer to Section 2D, Rear
Suspension.

6.  Install the brake disc caliper and the brake rotor.

Refer to Section 4F, Rear Disc Brakes.

7.  Install the rear wheel. Refer toSection 2E, Tires and

Wheels.

8.  Lower the vehicle.

 

SECTION : 9K

SQUEAKS AND RATTLES

TABLE OF CONTENTS

DIAGNOSIS

9K–1

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

SQUEAK AND RATTLE DIAGNOSIS 

9K–1

. . . . . . . . 

MAINTENANCE AND REPAIR

9K–3

. . . . . . . . . . . . . . . 

ON–VEHICLE SERVICE

9K–3

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

SQUEAK AND RATTLE REPAIR

9K–3

. . . . . . . . . . . . 

DIAGNOSIS

SQUEAK AND RATTLE DIAGNOSIS

Rattle Coming From the Side Rail

Checks

Action

Check the brake lines.

S

  Tap lightly on the brake lines and listen for a rattle.

S

  Install plastic tie straps to secure the brake lines

tightly together.

Rattle Under Vehicle at Higher RPM

Checks

Action

Check for heat shield contact with the underbody.

S

  Raise the vehicle and perform a visual inspection.

S

  Bend the heat shield slightly to gain clearance from

the underbody.

Squeak From the Front of the Vehicle in Cold Weather

Checks

Action

Check the front stabilizer shaft insulators.

S

  While the vehicle is cold, perform a test drive and

achieve full front suspension travel by driving through
a dip in the road.

S

  Remove the insulators and wrap teflon tape around

the stabilizer shaft. Reinstall the insulators over the
tape.

Thump From Rear of Vehicle on Bumps

Checks

Action

Check for a properly secured spare tire in the rear
compartment.

S

  Open the rear compartment and perform a visual

inspection of the spare tire and the tools.

S

  Tightly secure the spare tire and all tools.

S

  Perform a road test to verify that the noise is elimi-

nated.

9K – 2

I

SQUEAKS AND RATTLES

DAEWOO V–121 BL4

Glass Knock Coming From the Rear of the Vehicle When Driving

Over Bumps

Checks

Action

Check for an out–of–adjustment hatchback latch.

S

  Test drive the vehicle in order to verify this condition.

S

  Loosen the latch nuts and adjust the latch downward.

Rattle Coming From Door

Checks

Action

Check the door lock solenoid.

S

  Remove the door trim panel and check if the sole-

noid is loose.

S

  Tighten the solenoid bolts.

Check for rattling electrical connectors inside the door trim
panel.

S

  Tap on the trim panel and listen for a rattle.

S

  Remove the trim panel and wrap foam padding

around the connectors as required.

Squeak When Operating Doors

Checks

Action

Check for a lack of lubrication of the door hinge pins.

S

  Operate the doors and listen for squeaks.

S

  Lubricate the door hinge pins with light oil and coat

with lithium grease.

Squeak Coming From Console When Shifting Manual Transaxle

(Condition Occurs In Cold Weather with a Cold Engine)

Checks

Action

Check the manual transaxle control lever lower boot.

S

  Move the control lever between gears and listen for

squeaks.

S

  Remove the floor console and replace the lower shift

boot or apply talcum powder to the lower shift boot.

Buzz From the Left Side of Instrument Panel

Checks

Action

Check for vibration of the fuse box cover against the instru-
ment panel side trim.

S

  Tap on the cover with a finger and listen for a buzz.

S

  Apply 6.35 mm (0.250 inch) by 25.4 mm (1.00 inch)

felt pads to the side trim where the cover makes con-
tact.

Squeak Coming From Instrument Cluster Trim Plate

Checks

Action

Check for rubbing of the cluster trim plate on the instru-
ment panel.

S

  Test drive the vehicle in order to verify this condition.

S

  Remove the instrument cluster trim plate and install

felt tape to the edges.