2004 DAEWOO LACETTI wheel

WHEEL ALIGNMENT 2B – 9
DAEWOO V–121 BL4
REAR TOE ADJUSTMENT
Adjustment Procedure
1. Perform a preliminary inspection before any at-
tempt is made to change or correct the wheel align-
ment factors. Refer to ”Preliminary Inspection” in
this section.
2. Loosen the nuts on the parallel link–to–crossmem-
ber bolts.
3. Rotate the parallel link adjustment bolts until the
preferred rear toe specification is obtained. Refer
to”Wheel Alignment Specifications” in this section
for preferred specifications.
4. Hold the parallel link adjustment bolts and tighten
the parallel link–to–crossmember nuts.
Tighten
Tighten the parallel link–to–crossmember nuts to 90 NSm
(66 lb–ft).

2B – 10IWHEEL ALIGNMENT
DAEWOO V–121 BL4
GENERAL DESCRIPTION
AND SYSTEM 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 pun-
ishment. 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 al-
low 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
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 for-
ward. The specified toe angle is the setting which achieves
0 degrees 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, addition-
al toe will be needed to compensate for the wear.
Always correct the toe dimension last.
CASTER
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 posi-
tive, and a forward tilt is negative. Caster influences direc-
tional 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 toward 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 degrees and is not adjust-
able.
CAMBER
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 in-
ward, the camber is negative. The camber angle is mea-
sured in degrees from the vertical. Camber influences
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 not adjustable.
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 ve-
hicle.
SAI helps the vehicle track straight down the road and as-
sists 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 joint as viewed from the front of the vehicle.
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 negative or add
the positive camber readings to the Steering Axis Inclina-
tion (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 built into the design 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.

2C – 2IFRONT SUSPENSION
DAEWOO V–121 BL4
SPECIFICATIONS
GENERAL SPECIFICATIONS
ApplicationTrim Height
Center of Front Wheel to Bottom of Front Wheel Well368 mm (14.4 in.)
Center of Rear Wheel to Bottom of Rear Wheel Well367 mm (14.4 in.)
* CONDITION : Full Fuel in the Tank
FASTENER TIGHTENING SPECIFICATIONS
ApplicationNSmLb–FtLb–In
Ball Joint Pinch Bolt Nut6044–
Ball Joint–to–Control Arm Nuts10074–
Front Control Arm–to–Crossmember Bolt12592–
Rear Contral Arm–to–Crossmember Bolt11 081–
Crossmember Link–to–Crossmember Bolt11 484–
Crossmember Link–to–Transaxle Bracket Nut169125–
Drive Axle–to–Hub Caulking Nut300221–
Front Crossmember–to–Body Bolts13096–
Piston Rod Nut7555–
Rear Crossmember–to–Body Bolts196145–
Stabilizer Link–to–Strut Assembly Nut4735–
Stabilizer Shaft–to–Crossmember Clamp Bolts2518–
Stabilizer Shaft–to–Stabilizer Link Nut4735–
Steering Knuckle–to–Strut Assembly Nuts/Bolts12089–
Strut Assembly–to–Body Nut6548–

2C – 6IFRONT SUSPENSION
DAEWOO V–121 BL4
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 for damage or wear.

2C – 10IFRONT SUSPENSION
DAEWOO V–121 BL4
3. Install the stabilizer link onto the stabilizer shaft and
connect them with the stabilizer shaft–to–stabilizer
link nut.
Tighten
S Tighten the stabilizer shaft–to–stabilizer link nut
to 47 NSm (35 lb–ft).
S Tighten the stabilizer shaft–to–crossmember
clamp bolts to 25 NSm (18 lb–ft).
4. Install the front wheels. Refer to Section 2E, Tires
and Wheels.
STABILIZER LINK
Removal Procedure
1. Remove the stabilizer shaft–to–stabilizer link nut.
2. Remove the stabilizer link–to–strut assembly nut.
3. Remove the stabilizer link.
Installation Procedure
1. Install the stabilizer link.
2. Install the stabilizer link–to–strut assembly nut.
Tighten
Tighten the stabilizer link–to–strut assembly nut to 47
NSm (35 lb–ft).
3. Install the stabilizer shaft–to–stabilizer link nut.
Tighten
Tighten the stabilizer shaft–to–stabilizer link nut to 47
NSm (35 lb–ft).
KNUCKLE ASSEMBLY
Tools Required
KM–507–B Ball Joint Remover
Removal Procedure
1. Raise and suitably support the vehicle.
2. Remove the wheel. Refer to Section 2E, Tires and
Wheels.
3. Remove the caulking nut from the axle shaft.

2C – 12IFRONT SUSPENSION
DAEWOO V–121 BL4
Notice : Do not over extend the axle joints. When either
end of the shaft is disconnected, overextension of the joint
can result in separation of internal components and pos-
sible joint failure. Use drive axle joint seal protectors when-
ever performing service on or near the drive axles. Failure
to do so can cause internal joint or seal damage and result
in possible joint failure.
10. Support the drive axle.
11. Separate the drive axle shaft from the wheel hub.
12. Remove the bolts that connect the knuckle assem-
bly to the strut assembly.
13. Remove the knuckle assembly from the vehicle.
Installation Procedure
1. Install the knuckle assembly onto the vehicle.
2. Install the steering knuckle–to–strut assembly nuts.
Tighten
Tighten the steering knuckle–to–strut assembly nuts
to 120 NSm (89 lb–ft).
3. Connect the drive axle to the front wheel hub.
4. Connect the ball joint to the knuckle assembly.
5. Install the ball joint pinch bolt and the nut.
Tighten
Tighten the ball joint pinch bolt nut to 60 NSm (44 lb–
ft).
6. Connect the ABS speed sensor electrical connec-
tion.

FRONT SUSPENSION 2C – 13
DAEWOO V–121 BL4
7. Connect the outer tie rod to the knuckle assembly.
Refer to Section 6C, Power Steering Gear.
8. Install the brake caliper onto the rotor. Refer to
Section 4D, Front Disc Brakes.
9. Install the caulking nut onto the axle shaft.
Tighten
Tighten the drive axle–to–hub caulking nut to 150
NSm (111 lb–ft). Loosen the nut, then retighten it to
275 NSm (126 lb–ft).
10. Install the wheel. Refer to Section 2E, Tires and
Wheels.
11. Lower the vehicle.
HUB AND BEARING
Tools Required
500–20 Hex Nut
J–36661–2 Forcing Screw
J–37105–B–1 Support Bridge
J–37105–B–2 Bearing Adapter
J–377105–B–3 Hub Adapter
Removal Procedure
1. Remove the drive axle from the front wheel hub.
Refer to ”Knuckle Assembly” in this section.
2. Remove the inner snap ring.
3. Remove the wheel hub with the support bridge
J–37105–B–1, the hub adapter J–377105–B–3, the
hex nut 500–20, and the forcing screw J–36661–2.
4. Remove the brake shield. Refer to Section 4D,
Front Disc Brakes.
5. Remove the outer snap ring.

2C – 14IFRONT SUSPENSION
DAEWOO V–121 BL4
6. Remove the wheel bearing with the support bridge
J–37105–B–1, the bearing adapter J–37105–B–2,
the hex nut 500–20, and the forcing screw
J–36661–2.
7. Clean the bore of the knuckle.
Installation Procedure
1. Install the outer snap ring and push the wheel bear-
ing into place with the support bridge
J–37105–B–1, the bearing adapter J–37105–B–2,
the hex nut 500–20, and the forcing screw
J–36661–2.
2. Install the brake shield. Refer to Section 4D, Front
Disc Brakes.
3. Install the inner snap ring.
4. Push the wheel hub into place with the hub adapter
J–37105–B–3, the bearing adapter J–37105–B–2,
the hex nut 500–20, and the forcing screw
J–36661–2.
5. Install the drive axle into the front wheel hub. Refer
to Knuckle/Strut Assembly” in this section.
CONTROL ARM
Tools Required
KM–507–B Ball Joint Remover
Removal Procedure
1. Raise and suitably support the vehicle. Let the con-
trol arms hang free.
2. Remove the wheel. Refer to Section 2E, Tires and
Wheels.
3. Remove the pinch bolt and the nut from the ball
joint.
4. In case of right–hand side, remove the engine
mounting.