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a.Substitute a known good set of wheels and tires.
b. Perform a road test.
c. If the vehicle still exhibits a shake or vibration, note the vehicle speed
and/or engine rpm which it occurs.
● Is the vibration felt ?
→ YES
Engine/transmission imbalance.
See the specification of TR group, EM group, FL group and EC group.
→ NO
Install the original tire/wheel assemblies one by one, Road testing at
each step until the damaged tire(s)/wheel(s) as necessary. Test the
system for normal operation.
Wheel /tire noise, vibration and harshness concerns are directly related to vehicle speed and are not generally affected
by acceleration, coasting or decelerating. Also, out - of- balance wheel and tires can vibrate at more than one speed. A
vibration that is affected by the engine rpm, or is eliminated by placing the transmission in Neutral is not related to the
tire and wheel. As a general rule, tire and wheel vibrations felt in the steering wheel are related to the front tire and
wheel assemblies. Vibrations felt in the seat or floor are related to the rear tire and wheel assemblies. This can initially
isolate a concern to the front or rear.
Careful attention must be paid to the tire and wheels. There are several symptoms that can be caused by damaged or
worn tire and wheels. Perform a careful visual inspection of the tires and wheel assemblies. Spin the tires slowly and
watch for signs of lateral or radial runout. Refer to the tire wear chart to determine the tire wear conditions and actions WHEEL AND TIRE DIAGNOSIS
Rapid wear at the center Rapid wear at both shoulders Wear at one shoulder
a.Center - tread down to fabric due to
excessive over inflated tires
b. Lack of rotation
c. Excessive toe on drive wheels
d. Heavy acceleration on drive a.
Under- inflated tires
b. Worn suspension components
c. Excessive cornering speeds
d. Lack of rotation a.
Toe adjustment out of specification
b. Camber out of specification
c. Damaged strut
d. Damaged lower arm
Partial wear Feathered edge Wear pattern
a.Caused by irregular burrs on
brake drums a.
Toe adjustment out of
specification
b. Damaged or worn tie rods
c. Damaged knuckle a.
Excessive toe on non- drive
wheels
b. Lack of rotation
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2007 > 2.7L V6 GASOLINE >
WHEEL ALIGNMENT
When using commercially available computerized four wheel alignment equipment (caster, camber, toe) to inspect the
front wheel alignment, always position the car on a level surface with the front wheels facing straight ahead.
Prior to inspection, make sure that the front suspension and steering system are in normal operating condition and
that the wheels and tires face straight ahead and the tires are inflated to the specified pressure.
TOE
Toe is a measurement of how much the front of the wheels are turned in or out from the straight- ahead position.
Item Description
A - B < 0 Positive (+) toe (toe in)
A - B > 0 Negative ( - ) toe (toe out)
When the wheels are turned in toward the front of the vehicle, toe is positive (+) (toe in). When the wheels are turned
out toward the front of the vehicle, toe is negative(- ) (toe out). Toe is measured in degrees, from side to side, and
totaled.
[FRONT]
Toe- in(B - A or angle a+b) is adjusted by turning the tie rod turnbuckles. Toe- in on the left front wheel can be reduced
by turning the tie rod toward the rear of the car. Toe- in change is adjusted by turning the tie rods for the right and left
heels simultaneously at the same amount as follows.
Standard value :
Toe- in (B- A) mm (in) : 0 ± 2 (0 ± 0.0787)
a. Toe- in adjustment should be made by turning the right and left tie rods at the same amount.
b. When adjusting toe - in, loosen the outer bellows clip to prevent twisting the bellows.
c. After the adjustment, tighten the tie rod end lock nuts firmly and reinstall the bellows clip.
d. Adjust each toe - in to be the range of ±1mm.
Tie rod(A) Specified torque Nm (kgf.m, lb - ft) :
70 ~ 80 (7 ~ 8, 50.6 ~ 57.8)
Page 582 of 1575
2007 > 2.7L V6 GASOLINE >
SERVICE ADJUSTMENT PROCEDURE
CHECKING STEERING WHEEL FREE PLAY
1. Start the engine and with the steering wheel in the straight ahead position.
2. Measure the play while turning the steering wheel to the left and right.
Standard value :
Steering wheel free play : 30 mm (1.1 in)
3.If the play exceeds the standard value, inspect the connection between the steering shaft and tie rod ends.
CHECKING STEERING ANGLE
1.Place the front wheel on a turning radius gauge and measure the steering angle.
Standard value
VRS on Inner
38.64 °
Outer 31.78 °
VRS off Inner
41.91 °
Outer 33.54 °
2. If the measured value is not within the standard value, adjust the toe and inspect again.
CHECKING THE TIE ROD END BALL JOINT STARTING TORQUE
1.Disconnect tie rod and knuckle with the special tool (09568- 4A000).