Pontiac Fiero 1988 Service Manual page 211

3E-8 TIRES AND WHEELS
W h e e l W e i g h t s
Fig. 15
If more than 85 grams (3.0 oz.) are needed, the
wheel weights should be split as equal as possible
between the inboard and outboard flanges.
Balancing of assemblies with factory aluminum
wheels requires the use of special nylon coated clip-on
type wheel weights. These weights are designed to fit
over the thicker rim flange of the aluminum wheel and
should be installed with a plastic tipped hammer.
Adhesive wheel weights are also available. Use
the following procedure to install adhesive wheel
weights.
Adhesive Wheel Weight Installation
1. Clean wheel by sanding to bare aluminum where
wheel weight is to be located.
2. Wipe wheel weight attachment area with a
mixture of half Isopropyl alcohol and half water.
A clean cloth or paper towel must be used for this
operation.
3. Dry the attachment area with hot air. Surface of
wheel should be warm to the touch.
4. The adhesive backing on wheel weights must be
warmed to room temperature.
5. Remove tape from back of weights. Do not touch
the adhesive surface.
6. Apply wheel weight and press on with hand
pressure.
7. Secure wheel weight with a 70410 N (16-25 lb)
force applied with a roller.
does not significantly affect the appearance or tire
tread life. Tire truing with a blade-type machine is not
recommended as this reduces the tread life
substantially and often does not permanently correct
the problem.
Another method is to dismount the tire and
rotate it 180 degrees on the rim. It is important that
this be done on tire and wheel assemblies which are
known to be causing a vibration as it is just as likely to
cause good assemblies to vibrate.
Refer to Section 3, "Vibration Diagnosis" for
more details.
ALUMINUM WHEEL CLEANING
Aluminum wheels should be cleaned and waxed
regularly. Do not use abrasive cleaners, as they could
damage the protective coating.
ALUMINUM WHEEL HUB CAP
1.
2.
+4-
Remove or Disconnect
Tire and wheel assembly
Place a block of wood approximately 2" in
diameter with a squared off end against the back
surface of the cap. A sharp hammer blow on the
block of wood will remove the cap.
Install or Connect
1 Place cap into position at wheel opening and
place a block of wood at least three inches in
diameter against cap face. Install cap by striking
block of wood with hammer.
2. Tire and wheel assembly
1. CENTERLINE
2. INSIDE FLANGE
3. CLIP-ON WEIGHT
4. ADHESIVE WEIGHT - DYNAMIC
5. ADHESIVE WEIGHT - STATIC ONLY
6. MOUNTING FACE
G35335-3E-AN
Fig. 15 Aluminum W h e e l Weight Placement
CORRECTING NON-UNIFORM TIRES
There are two ways to correct tires which cause
a vibration even though they are properly balanced.
One method uses an automatic machine which loads
the tire and buffs small amounts of rubber from high
spots on the outer two tread rows. Correction by this
method is usually permanent and, if done properly,
N O T I C E :
Failure to hit cap squarely without the
load distributed evenly could result in permanent
damage to the cap.
ALUMINUM WHEEL POROSITY REPAIR
1. Remove tire and wheel assembly.
2. Locate leaking areas by inflating tire to 345 kPa
(50 psi) and dipping tire and wheel assembly into
a water bath.
3. Mark leak areas and remove tire from wheel.
4. Scuff inside surface at leak area with 80 grit
sandpaper and clean area with general purpose
cleaner such as 3M #08984 or equivalent.
5. Apply 1/8" thick layer of adhesive/sealant P/N
1052366 or equivalent to leak area and allow
twelve hours of drying time.
6. Mount tire on wheel, pressurize to 345 kPa (50
psi) and check for leaks.
C A U T I O N : T o a v o i d s e r i o u s p e r s o n a l
i n j u r y , d o n o t s t a n d o v e r t i r e w h e n
i n f l a t i n g . B e a d m a y b r e a k w h e n b e a d
s n a p s o v e r s a f e t y h u m p . D o n o t
e x c e e d 2 7 5 k P a ( 4 0 p s i ) p r e s s u r e
w h e n i n f l a t i n g a n y t i r e if b e a d s a r e