Daewoo Nubira. Manual - part 253

2E – 4

I

TIRES AND WHEELS

DAEWOO V–121 BL4

Tighten the wheel nuts to 90 N

S

m (66 lb–ft) [Steel

Wheel], 122 N

S

m (90 lb–ft) [Alloy Wheel].

TIRES AND WHEELS  2E – 5

DAEWOO V–121 BL4

ON–VEHICLE BALANCING

On–vehicle balancing will help correct vibrations due to
brake drum, rotor, and wheel cover imbalances.

Notice :  Do not allow the front suspension to hang free.
When the drive axle is run at an extreme angle, extra vibra-
tions can occur, as well as damage to seals and joints.

1.  During on–vehicle balancing, do not remove the

balance weights from the off–vehicle dynamic bal-
ance.

2.  If more than 1 ounce of additional weight is re-

quired, split the weight between the inner and the
outer rim flanges.

CAUTION :  Do not spin the drive wheels faster than
55km/h (35 mph) as indicated by the speedometer.
This limit is necessary because the speedometer indi-
cates only one–half of the actual wheel speed when
one drive wheel is spinning and the other drive wheel
is stopped. Personal injury and damage may result
from high–speed spinning.

3.  Spin the driven tire and wheel assemblies using the

engine.

2E – 6

I

TIRES AND WHEELS

DAEWOO V–121 BL4

UNIT REPAIR

ALLOY WHEEL POROSITY

Wheel repairs that use welding, heating or peening are not
approved.

1.  Raise and suitably support the vehicle.
2.  Remove the wheel. Refer to ”Wheel”in this section.

CAUTION :  To avoid serious injury, do not stand over
the tire when inflating, because the bead may break
when it snaps over the safety hump. Do not exceed
275 kPa (40 psi) of air pressure in any tire if the beads
are not seated. If 275 kPa (40 psi) of air pressure will
not seat the beads, deflate the tire. Relubricate the
beads. Reinflate the tire. Overinflation may cause the
bead to break and cause serious injury.

3.  Locate leaking areas by inflating the tire to 345 kPa

(50 psi) and dipping the tire and wheel assembly
into a water bath.

4.  Mark the leak areas and remove the tire from the

wheel.

5.  Scuff the inside wheel surface at the leak area with

80–grit sandpaper. Clean the leak area with a gen-
eral– purpose cleaner.

6.  Apply a 3.3 mm (0.13 inch) thick layer of adhesive/

sealant to the leak area. Allow it to dry for 12 hours.

7.  Install the tire on the wheel. Inflate the tire to 345

kPa (50 psi) and check for leaks as in step 3.

8.  Adjust the tire pressure to meet specifications. Re-

fer to”Tire Size and Pressure Specifications”in this
section.

9.  Balance the wheel. Refer to ”Tire and Wheel Bal-

ancing”in this section.

10.  Install the wheel. Refer to ”Wheel”in this section.
11.  Lower the vehicle.

ALLOY WHEEL REFINISHING

 A protective clear or color coating is applied to the surface
of the original equipment cast alloy wheels. Surface deg-
radation can develop if this clear coating is damaged or re-
moved. This can happen at some automatic car wash fa-
cilities that use silicon carbide–tipped tire brushes to clean
white walls and tires. Once the protective coating is dam-
aged, exposure to caustic cleaners or road salt causes fur-
ther surface degradation. The following procedure details
how to strip, clean and recoat alloy wheels.

CAUTION : To avoid serious personal injury, follow
the manufacturer

’

s recommendations and cautions

when using these materials.

Required materials:

S

 

Amchem Alumi Prep No. 33. Stock No. DX533 or
equivalent cleaning and conditioning chemical for
alloys.

S

 

Amchem Alodine No. 1001. Stock No. DX50T or
equivalent coating chemical for alloys.

S

 

Ditzler Delclear Acrylic Urethane Clear, Stock No.
DAU–75 or equivalent.

S

 

Ditzler Delthane Ultra–Urethane Additive, Stock No.
DXR–80 or equivalent.

Before repairing the alloy damage or the clear coat dam-
age, prepare the wheels and the tires.
5.  Remove the wheel from the vehicle.
6.  Mark the location of the outboard weights and re-

move them.

7.  Wash the wheel inside and out with a water–based,

all–purpose cleaner. Remove the grease and oil
with a solvent cleaner.

8.  Mask the tire prior to painting.
9.  Using a 400–grit wet or dry sandpaper, sand over

the painted areas that will not require recoloring.
Sanding will promote the adhesion of the clear coat.

Alloy Damage on Wheel Surface

1.  Mount the wheel on a brake lathe and spin the as-

sembly slowly.

2.  Sand the wheel with a backing block or pad. Hold

the backing block or pad flat to the surface of the
wheel and sand slowly back and forth from the cen-
ter to the outer edge of the tire to remove the dam-
age. Use the following sandpaper grits in the order
listed:

1) 80 grit.
2) 150 grit.
3) 240 grit.

Clear Coat Damage on Unpainted Wheels

1.  Apply the chemical stripper Amchem Alumi Prep

No. 33. Use a small 1/4–inch detail brush to apply
the stripper around the perimeter and spoke–like
areas.

2.  Remove the stripper according to the manufactur-

er

’

s recommendations.

CAUTION :  To avoid serious personal injury, do not
use engine power to rotate the wheel while sanding.
3.  Sand the wheel with 240–grit sandpaper by rotating

the wheel on a slow–spinning brake lathe or by
mounting the wheel on the car and spinning it by
hand. Sanding restores the machined appearance
and promotes adhesion.

After repairing the alloy or clear coat damage, the wheels
must be recoated.

Recoating Procedure

CAUTION :  To avoid serious personal injury when ap-
plying any two–part component paint system, follow
the specific precautions provided by the paint
manufacturer. Failure to follow these precautions
may cause lung irritation and an allergic respiratory
reaction.
1.  Clean the surface.
2.  Soak the wheel with Amchem Alumi Prep No. 33 or

equivalent for 1 to 3 minutes. Rinse the wheel with
water and blow it dry.

3.  Soak the wheel with Amchem Alodine No. 1001 or

equivalent for 1 to 3 minutes. Rinse the wheel with
water and blow it dry.

TIRES AND WHEELS  2E – 7

DAEWOO V–121 BL4

4.  Finish with Ditzler Delclear Urethane and Ditzler

Ultra– Urethane Additive or equivalent, using three
coats.

1st coat – spray on a light mist coat; let dry.
2nd coat – spray or paint on a light coat; let dry.
3rd coat – spray or paint on a heavy double wet
coat; let dry.

5.  Let the urethane dry for 24 hours or flash for 30

minutes and force dry at 60

³

C (140

³

F) for 30 min-

utes. Allow the urethane to cool for 5 minutes be-
fore mounting the wheel on the vehicle.

OFF–VEHICLE BALANCING

Perform wheel balancing with an electronic off–vehicle ba-
lancer. The balancer is easy to use and gives both a static
and a dynamic balance. Unlike on–vehicle balancing, the
off–vehicle balancer does not correct for drum or rotor im-
balance. This drawback is overcome by its accuracy (usu-
ally to within 1/8 ounce). Secure the wheel on the balancer
with a cone through the back side of the centerhole, not
through the wheel bolt holes.

CORRECTING NON–UNIFORM TIRES

There are two ways to correct properly balanced tires
which still vibrate. One method uses an automatic ma-
chine which loads the tire and buffs small amounts of rub-
ber from high spots on the outer two tread rows. Correction
by this method is usually permanent and, if it is done prop-
erly, does not significantly affect the appearance or the
tread life of the tire. Tire truing with a blade–type machine
is not recommended because it substantially reduces the
tread life and often does not correct the problem perma-
nently.

Another method is to dismount the tire and rotate it 180 de-
grees on the rim. Do this only on the tire and wheel assem-
blies which are known to be causing a vibration because
this method is just as likely to cause good assemblies to
vibrate.

TIRE AND WHEEL
MATCH–MOUNTING

The tires and wheels are match–mounted at the assembly
plant. Match–mounting aligns the radially stiffest part of
the tire, or high spot, to the smallest radius, or low spot, of
the wheel.

The high spot of the tire is originally marked by a red paint
mark or an adhesive label on the outboard sidewall.

The low spot of the wheel will be at the location of the valve
stem.

Before dismounting a tire from its wheel, scribe a line on
the tire at the valve stem to assure that it is remounted in
the same position.

Replacement tires that are of original equipment quality
will have their high and low spot marked in the same man-
ner.

TIRE MOUNTING AND DISMOUNTING

Notice : Use a tire–changing machine to mount or dis-
mount the tires. Follow the equipment manufacturer

’

s in-

structions. Do not use hand tools or tire irons to change
tires. These tools may damage the beads or the wheel rim.

1.  Clean the rim bead seats with a wire brush or

coarse steel wool to remove lubricants, old rubber,
and light rust. Before mounting or dismounting a
tire, lubricate the bead area well with an approved
tire lubricant.

CAUTION : To avoid serious injury, do not stand over
the tire when inflating it, because the bead may break
when it snaps over the safety hump. Do not exceed
275 kPa (40 psi) of air pressure in any tire if the beads
are not seated. If 275 kPa (40 psi) of air pressure will
not seat the beads, deflate the tire. Relubricate the
bead and reinflate the tire. Overinflation may cause
the bead to break and cause serious injury.

2.  After mounting the tire, inflate it until the beads are

seated. Never exceed 275 kPa (40 psi) to seat the
beads.

3.  Install the valve core and inflate the tire to the prop-

er pressure. Make sure the locating ring outside of
the bead of the tire shows around the rim flanges of
the wheel on both sides. This positioning of the tire
will insure that the bead of the tire is seated.