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.
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