Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1988R 20 P/U 2WD V8-454 7.4LREPAIR AND DIAGNOSISMAINTENANCEALIGNMENTSERVICE AND REPAIRFRONT WHEEL ALIGNMENT
1988 Chevrolet R 20 P/U 2WD V8-454 7.4L
Front Wheel Alignment
1988 Chevrolet R 20 P/U 2WD V8-454 7.4LSECTION Front Wheel Alignment
Alignment Specs.:
Fig. 1 Vehicle trim heights:
``Z'' HEIGHT ADJUSTMENT
1. Lift front bumper of vehicle up approximately 1.5 inches (38 mm).
2. Gently remove remove hands and allow vehicle to settle on its own.
3. Repeat this operation twice more for a total of three times.
4. Measure ``Z'' height, Fig. 1.
5. Push front bumper on vehicle down approximately 1.5 inches (38 mm).
6. Gently remove hands and allow vehicle to rise on its own.
7. Repeat this operation twice more for a total of three times.
8. Measure ``Z'' height.
9. Find the average of the high and low measurements. This is the ``Z'' height. ``Z'' height should be 2.89 inches.
``D'' HEIGHT ADJUSTMENT
Use the same procedure used in determining the ``Z'' height.
CAMBER ADJUSTMENT
1. Determine the camber from the alignment equipment.
2. Install adjustment kit No. 15538596.
3. Reset camber to specifications.
Fig. 1 Vehicle trim heights:
Fig. 2 Caster measurements:
CASTER ADJUSTMENT
All caster specifications are given with the vehicle frame level (zero angle).
1. Position vehicle on a smooth level surface.
2. If necessary, correct ``Z'' height.
3. Using a bubble protractor or inclinometer, measure frame angle, Figs. 1 and 2.
4. Note frame angle as being up in the rear or down in the rear.
5. Determine caster angle from alignment equipment.
6. Determine actual (corrected) caster reading, Fig. 2.
7. When measuring caster, note the following:
a. A down in rear frame angle must be subtracted from a positive caster reading.
b. An up in rear frame angle must be added to a positive caster reading.
c. A down in rear frame angle must be added to a negative caster reading.
d. An up in rear frame angle must be subtracted from a negative caster reading.
8. If the caster angle is incorrect, correct the caster angle by turning the adjustment cam bolts.
TOE-IN ADJUSTMENT
1. Determine toe-in from the alignment equipment.
2. Change length of both tie rod sleeves to effect a toe change.
3. Toe-in can be increased or decreased by changing the length of the tie rod ends. A threaded sleeve is provided for this purpose. When the tie rod ends are mounted ahead of the steering knuckle they must be decreased in length in order to increase toe-in. When the tie rod ends are mounted behind the steering knuckle they must be lengthened in order to increase toe-in.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.