Daewoo Nubira. Manual - part 256

2B – 6

I

WHEEL ALIGNMENT

DAEWOO V–121 BL4

should be less than 1.5 mm (0.06 inch). If either
measurement xceeds this number, proceed to step
2.

2.  Mount the tire and the wheel on a dynamic balanc-

ing machine and remeasure the free lateral and the
free radial runout. Record the amount of the free
lateral and the free radial runout and the location of
the highest measurement. Refer to Section 2E,
Tires and Wheels.  If the free radial or the free lat-
eral runout exceeds 1.3 mm (0.05 inch) at the tire
tread, proceed to Step 4.

3.  Measure the wheel runout. Refer to Section 2E,

Tires and Wheels.  If the wheel exceeds specifica-
tions, replace it.

4.  Deflate the tire and match–mount the high radial

runout point of the tire to the low radial runout point
of the wheel. Reinflate the tire and mount it on the
dynamic balancing machine. Measure and record
the free radial and the free lateral runout and their
locations. In many cases, match mounting the tire
on the wheel will bring the tire and wheel assem-
bly’s free runout into an acceptable range of 1.3
mm (0.05 inch) or less.

5.  If the free runout of the tire and wheel assembly is

1.3 mm (0.05 inch) or less when it was measured
off the vehicle, yet exceeds 1.3 mm (0.05 inch)

when measured on the vehicle, the attachment of
the tire and wheel assembly to the hub is the prob-
able cause of the vibration. Rotate the assembly

’

s

two wheel studs and recheck the runout. Refer to
Section 2E, Tires and Wheels.  Several positions
may have to be tried to find the best location for the
studs.

6.  If the tire and wheel assembly free runout cannot

be reduced to 1.3 mm (0.05 inch) or less, remove
the assembly.

1) Measure the wheel stud runout using a dial indi-

cator set with a magnetic base.

2) Zero the dial indicator set button on one stud.
3) Gently lift the set button off the stud. Rotate the

flange to position the next stud against the dial
indicator set.

4) Record the runout of all the studs. The dial indi-

cator should read zero when it is repositioned on
the first stud that was checked.

5) If the runout exceeds 0.76 mm (0.03 inch), the

hub stud or the hub and bearing assembly
should be replaced.

Whenever a tire is rotated on the wheel, or whenever a tire
or wheel is replaced, rebalance the assembly.

WHEEL ALIGNMENT  2B – 7

DAEWOO V–121 BL4

Wheel Runout Diagnosis Chart

Step

Action

Value(s)

Yes

No

1

Road test the vehicle to verify the vibration com-
plaint.
Are the customer’s concerns verified?

Go to Step 2 

System OK

2

1.  Perform a vibration diagnosis preliminary

check.

2.  Repair any of the problems found.

Is the vibration still present? Is the vibration still pres-
ent?

Go to Step 3 

System OK

3

Determine at what speed the vibration is present.
Is the vibration over 64 km/h (40 mph)?

Go to Step 4 

Go to Step 6

4

Perform an off–vehicle dynamic wheel balance.
Is the vibration still present?

 Go to Step 5 

System OK

5

Perform an on–vehicle finish balance.
Is the vibration still present?

 Go to Step 6 

System OK

6

Perform a free lateral and a radial on–vehicle runout
check.
Does the runout match the value specified?

1.5 mm (0.06

in.)

Go to Step 4 

Go to Step 7 

7

Perform a free lateral and a free radial off–vehicle
runout check.
Does the runout match the value specified?

1.3 mm (0.05

in.)

 Go to Step 8 

Go to Step 12

8

1.  Index the tire and wheel assembly on the hub

studs.

2.  Obtain the least amount of runout possible.

Does the runout match the value specified?

0.76 mm (0.03

in.)

Go to Step 9 

Go to Step 14 

9

Perform an off–vehicle dynamic wheel balance.
Is the vibration still present?

Go to Step 10 

System OK

10

Perform an on–vehicle finish balance.
Is the vibration still present?

 Go to Step 11 

System OK

11

1.  Check for any engine driveline imbalance.
2.  Thoroughly inspect the drive axles and the

constant velocity joints.

3.  Repair any problems found.

Are the repairs complete?

Go to Step 1 

12

1.  Match–mount the tire on the wheel.
2.  Perform a free lateral and a free radial off–ve-

hicle runout check.

Does the runout match the value specified?

1.5mm (0.06

in.)

Go to Step 9 

Go to Step 13

13

1.  Dismount the tire from the wheel of the sus-

pected assembly.

2.  Measure the runout of the wheel.

Does the runout match the value specified?

0.8 mm (0.03

in.)

Go to Step 15 

Go to Step 16

14

Measure the hub flange runout.
Does the runout match the value specified?

0.76 mm (0.03

in.)

Go to Step 9 

Go to Step 17

15

Replace the tire.
Is the repair complete?

Go to Step 1 

2B – 8

I

WHEEL ALIGNMENT

DAEWOO V–121 BL4

Step

No

Yes

Value(s)

Action

16

Replace the wheel.
Is the repair complete?

 Go to Step 1 

17

Replace the hub.
Is the repair complete?

 Go to Step 1 

 

WHEEL ALIGNMENT  2B – 9

DAEWOO V–121 BL4

PRELIMINARY INSPECTION

Checks

Action

Check the tires for proper inflation pressures and normal
tread wear.

Inflate the tires to the proper tire pressure. Replace the
tires as needed.

Check the wheel bearings for looseness.

Tighten the axle nut to the proper specification. Replace
the strut wheel bearing as needed.

Check for loose ball joints and tie rod ends.

Tighten the ball joints and the tie rods.

Check the runout of the wheels and the tires.

Measure and correct the tire runout.

Check the vehicle trim heights.

 Correct the trim heights. Make the correction before ad-
justing the toe.

Check for loose rack and pinion mounting.

Tighten the mounting brackets for the rack and pinion as-
sembly.

Check for improperly operating struts.

 Replace the strut assembly.

Check for loose control arms.

Tighten the control arm attachment bolts. Replace the con-
trol arm bushings as needed.

FRONT TOE ADJUSTMENT

Adjustment Procedure

1.  Disconnect the outer tie rods from the knuckle as-

semblies. Refer toSection 6C, Power Steering
Gear.

2.  Turn the right and the left outer tie rods and the ad-

juster nuts to align the toe to 0 degrees –10 to +10
minutes.

3.  Reconnect the outer tie rods to the knuckle assem-

blies. Refer to Section 6C, Power Steering Gear.

Notice : In this adjustment, the right and the left tie rods
must be equal in length, or the tires will wear unevenly.

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 damaged,
loose, bent, dented, or worn suspension part. If the prob-
lem is body related, repair the body.