Daewoo Nubira. Manual - part 231

SECTION : 2C

FRONT SUSPENSION

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 LOCK unless otherwise noted.

TABLE OF CONTENTS

SPECIFICATIONS

2C–2

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

GENERAL SPECIFICATIONS

2C–2

. . . . . . . . . . . . . . . 

FASTENER TIGHTENING 

SPECIFICATIONS

2C–2

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

SPECIAL TOOLS

2C–2

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

SPECIAL TOOLS TABLE

2C–2

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

DIAGNOSIS

2C–3

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

STRUT DAMPENER

2C–3

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

BALL JOINT AND KNUCKLE

2C–4

. . . . . . . . . . . . . . . 

EXCESSIVE FRICTION CHECK

2C–4

. . . . . . . . . . . . 

COMPONENT LOCATOR

2C–5

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

FRONT SUSPENSION

2C–5

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

MAINTENANCE AND REPAIR

2C–7

. . . . . . . . . . . . . . . 

ON–VEHICLE SERVICE

2C–7

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

STABILIZER SHAFT AND INSULATORS

2C–7

. . . . . 

STABILIZER LINK

2C–9

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

KNUCKLE ASSEMBLY

2C–11

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

HUB AND BEARING

2C–15

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

CONTROL ARM

2C–17

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

STRUT ASSEMBLY

2C–20

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

CROSSMEMBER ASSEMBLY

2C–24

. . . . . . . . . . . . . 

UNIT REPAIR

2C–26

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

BALL JOINT

2C–26

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

CONTROL ARM BUSHINGS

2C–26

. . . . . . . . . . . . . . . 

FRONT STRUT ASSEMBLY

2C–28

. . . . . . . . . . . . . . . 

KNUCKLE

2C–32

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

CROSSMEMBER

2C–32

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

GENERAL DESCRIPTION AND SYSTEM

OPERATION 

2C–35

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

FRONT SUSPENSION 

(FOR ENGINE FAMILY I)

2C–35

. . . . . . . . . . . . . . . . 

FRONT SUSPENSION 

(FOR ENGINE FAMILY II)

2C–35

. . . . . . . . . . . . . . . . 

2C – 2

I

FRONT SUSPENSION

DAEWOO V–121 BL4

SPECIFICATIONS

GENERAL SPECIFICATIONS

Application

Trim Height

Rocker Panel, Front to Ground

195 mm (7.7 in.)

Rocker Panel, Rear to Ground

191 mm (7.5 in.)

FASTENER TIGHTENING SPECIFICATIONS

Application

N

S

m

Lb–Ft

Lb–In

Ball Joint Pinch Bolt Nuts

60

44

–

Ball Joint–to–Control Arm Nuts

100

74

–

Control Arm–to–Crossmember Nuts/Bolts

110

81

–

Crossmember Link–to–Crossmember Bolt

125

92

–

Crossmember Link–to–Transaxle Bracket Nut

67

49

–

Crossmember Support Plate–to–Body Bolts

–

Drive Axle–to–Hub Caulking Nut (First Torque)

150

111

–

Drive Axle–to–Hub Caulking Nut (Last Torque)

50+60

³

37+60

³

–

Front Crossmember–to–Body Bolts

47

35

–

Piston Rod Nuts

75

55

–

Rear Crossmember–to–Body Bolts

196

145

–

Stabilizer Link–to–Strut Assembly Nut

47

35

–

Stabilizer Shaft–to–Crossmember Clamp Bolts

22

18

–

Stabilizer Shaft–to–Stabilizer Link Nut

47

35

–

Steering Knuckle–to–Strut Assembly Nuts/Bolts

100

74

–

Strut Assembly–to–Body Nuts

30

22

–

SPECIAL TOOLS

SPECIAL TOOLS TABLE

500–20

Hex Nut

J–36661–2

Forcing Screw

FRONT SUSPENSION  2C – 3

DAEWOO V–121 BL4

J–37105–40

Support Bridge

J–37105–B–3

Hub Adapter

KM–158

Remover/Installer

KM–329–A

Spring Compressor

KM–307–B

Ball Joint Remover

J–37105–B–2

Bearing Adapter

DIAGNOSIS

STRUT DAMPENER

A strut dampener is basically a shock absorber. However, strut dampeners are easier to extend and retract by hand than
are shock absorbers.

Struts Seem Weak

Checks

Action

Check the tire pressures.

Adjust the tire pressures to the specifications on the tire
placard.

Check the load conditions under which the vehicle is nor-
mally driven.

Consult with the owner to confirm the owner’s understand-
ing of normal load conditions.

Check the compression and rebound effectiveness of the
strut dampener.

Quickly push down and then lift up on the corner of the
bumper nearest the strut dampener being tested.
Compare the compression and rebound with those of a
similar vehicle that has an acceptable ride quality.
Replace the strut dampener, if needed.

Struts Are Noisy

2C – 4

I

FRONT SUSPENSION

DAEWOO V–121 BL4

Checks

Action

Check the mountings for looseness or damage.

Tighten the strut dampener mounting nuts. Replace the
strut dampener, if needed.

Check the compression and rebound effectiveness of the
strut dampener.

Quickly push down and then lift up on the corner of the
bumper nearest the strut dampener being tested.
Compare the compression and rebound with those of a
similar vehicle that has an acceptable ride quality.
Replace the strut dampener, if needed.

Leaks

Checks

Action

Check for a slight trace of fluid.

The strut dampener is OK.

Check the seal cover on the fully extended strut.

Replace the strut dampener.

Check for an excessive amount of fluid on the strut damp-
ener.

Replace the strut dampener.

BALL JOINT AND KNUCKLE

Ball Joint Inspection

1.  Raise the front of the vehicle to allow the front sus-

pension to hang free.

2.  Grasp the tire at the top and the bottom.
3.  Move the top of the tire in an in–and–out motion.
4.  Look for any horizontal movement of the knuckle

relative to the control arm.

5.  Ball joints must be replaced under the following

conditions:

S

  The joint is loose.

S

  The ball seal is cut.

S

  The ball stud is disconnected from the knuckle.

S

  The ball stud is loose at the knuckle.

S

  The ball stud can be twisted in its socket with

finger pressure.

Ball Stud Inspection

Make sure to check the tightness of the ball stud in the
knuckle boss during each inspection of the ball joint. One
way to inspect the ball stud for wear is to shake the wheel
and feel for movement of the stud end at the knuckle boss.

Another way to inspect the ball stud for wear is to check
the fastener torque at the pinch nut. A loose nut can indi-
cate a stressed stud or a hole in the knuckle boss.

Worn or damaged ball joints and knuckles must be re-
placed.

EXCESSIVE FRICTION CHECK

Use the following procedure to check for excessive friction
in the front suspension:

1.  Enlist the help of another technician to lift up on the

front bumper, raising the vehicle as high as pos-
sible.

2.  Slowly release the bumper, allowing the vehicle to

assume its normal trim height. See ”General Speci-
fications”  in this section.

3.  Measure the distance from the street level to the

center of the bumper.

4.  Push down on the bumper, release slowly, and al-

low the vehicle to assume its normal trim height.

5.  Measure the distance from the street level to the

center of the bumper.

6.  The difference between the two measurements

should be less than 12.7 mm (0.5 inch). If the differ-
ence exceeds this limit, inspect the control arms,
the struts, and the ball joints fordamage or wear.