Diagnostic Information And Procedures; Strut Dampener; Ball Joint And Knuckle - Daewoo MATIZ Service Manual

DIAGNOSTIC INFORMATION AND PROCEDURES

A strut dampener is basically a shock absorber. However, strut dampeners are easier to extend and retract by hand
than are shock absorbers. Strut dampeners are used only on the front in most vehicles, including this vehicle. Shock
absorbers are used on the rear wheels.
Condition
Struts Seem Weak
Struts are Noisy
Leaks

BALL JOINT AND KNUCKLE

Ball Joint Inspection
1. Raise the front of the vehicle to allow the front sus-
pension to hang free.
2. Grasp the tire at the top and the bottom.
3. Move the top of the tire in an in-and-out motion.
4. Look for any horizontal movement of the knuckle rela-
tive to the control arm.
5. Control arms assembly must be replaced if the follow-
ing conditions exist:
D The joint is loose.
D The ball seal is cut.
D The ball stud is disconnected from the knuckle.
DAEWOO M-150 BL2

STRUT DAMPENER

Probable cause
D Improper tire pressures.
D Abnormal load conditions.
D Improper compression and rebound
effectiveness of the strut dampener.
D Loose or damaged mountings.
D Improper compression and rebound
effectiveness of the strut dampener.
D A slight trace of fluid.
D Leaks of the seal cover on the fully
extended strut.
D Excessive leaks of fluid on the strut
dampener.
FRONT SUSPENSION 2C – 5
D Adjust the tire pressures to the speci-
fications on the tire placard.
D Consult with the owner to confirm the
owner's understanding of normal load
conditions.
D Quickly push down and then lift up on
the corner of the bumper nearest the
strut dampener being tested.
D Compare the compression and re-
bound with those of a similar vehicle
that has an acceptable ride quality.
D Replace the strut dampener, if need-
ed.
D Tighten the strut dampener.
D Replace the strut dampener if need-
ed.
D Quickly push down and then lift up on
the corner of the bumper nearest the
strut dampener being tested.
D Compare the compression and re-
bound with those of a similar vehicle
that has an acceptable ride quality.
D Replace the strut dampener, if need-
ed.
D The strut dampener is OK.
D Replace the strut dampener.
D Replace the strut dampener.
D The ball stud is loose at the knuckle.
D The ball stud can be twisted in its socket with finger
pressure.
Ball Stud Inspection
Make sure to check the tightness of the ball stud in the
knuckle boss during each inspection of the ball joint.
One way to inspect the ball stud for wear is to shake the
wheel and feel for movement of the stud end or the cas-
tellated nut at the knuckle boss.
Another way to inspect the ball stud for wear is to check
the fastener torque at the castellated nut. A loose nut can
indicate a stressed stud or a hole in the knuckle boss.
Worn or damaged ball joints and knuckles must be re-
placed.
Correction