Opel Frontera UE. Manual - part 659

POWER-ASSISTED STEERING SYSTEM

2A–49

Supplemental Restraint System Steering Wheel & Column and 

Associated Parts

Main Data and Specifications

Torque Specifications

430RY00006

Special Tools

ILLUSTRATION

TOOL NO.

TOOL NAME

5–8521–0016–0

(J–29752)

Steering wheel remover

FRONT SUSPENSION

3C–1

SUSPENSION

FRONT SUSPENSION

CONTENTS

Service Precaution......................................... 3C - 1
General Description ....................................... 3C - 2

Diagnosis .................................................... 3C - 2

Shock Absorber............................................. 3C - 5

Shock Absorber and Associated Parts ....... 3C - 5
Removal ..................................................... 3C - 5
Inspection and Repair................................. 3C - 5
Installation .................................................. 3C - 5

Stabilizer Bar................................................. 3C - 6

Stabilizer Bar and Associated Parts ........... 3C - 6
Removal ..................................................... 3C - 6
Inspection and Repair................................. 3C - 6
Installation .................................................. 3C - 6

Torsion Bar.................................................... 3C - 7

Torsion Bar and Associated Parts .............. 3C - 7
Removal ..................................................... 3C - 7
Inspection and Repair................................. 3C - 8
Installation .................................................. 3C - 8

Knuckle ......................................................... 3C - 10

Knuckle and Associated Parts .................... 3C - 10
Removal ..................................................... 3C - 10
Inspection and Repair................................. 3C - 11
Installation .................................................. 3C - 11

Upper Control Arm ........................................ 3C - 13

Upper Control Arm and Associated 

Parts........................................................ 3C - 13

Removal...................................................... 3C - 13
Inspection and Repair................................. 3C - 14
Installation................................................... 3C - 14

Lower Control Arm ........................................ 3C - 17

Lower Control Arm and Associated 

Parts........................................................ 3C - 17

Removal...................................................... 3C - 17
Inspection and Repair................................. 3C - 18
Installation................................................... 3C - 19

Upper Ball Joint ............................................. 3C - 21

Upper Ball Joint and Associated Parts ....... 3C - 21
Removal...................................................... 3C - 21
Inspection and Repair................................. 3C - 22
Installation................................................... 3C - 22

Lower Ball Joint ............................................. 3C - 23

Lower Ball Joint and Associated Parts ....... 3C - 23
Removal...................................................... 3C - 23
Inspection and Repair................................. 3C - 24
Installation................................................... 3C - 24

Main Data and Specifications ........................ 3C - 25
Special Tools ................................................. 3C - 26

Service Precaution

WARNING:  THIS VEHICLE HAS A SUPPLEMENTAL 
RESTRAINT SYSTEM (SRS).   REFER TO THE SRS 
COMPONENT AND WIRING LOCATION VIEW IN 
ORDER TO DETERMINE WHETHER  YOU ARE 
PERFORMING SERVICE ON OR NEAR THE SRS 
COMPONENTS OR THE SRS WIRING.  WHEN YOU 
ARE PERFORMING SERVICE ON OR NEAR THE 
SRS COMPONENTS OR THE SRS WIRING,  REFER 
TO THE SRS SERVICE INFORMATION. FAILURE TO 
FOLLOW WARNINGS COULD RESULT  IN 
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL 
INJURY, OR OTHERWISE UNNEEDED SRS SYSTEM 
REPAIRS.

CAUTION:  Always use the correct fastener in the 
proper location.  When you replace a fastener, use 
ONLY the exact part number for that application. 
ISUZU will  call out those fasteners that require a 
replacement after removal. ISUZU will also call out 
the  fasteners that require thread lockers or thread 
sealant. UNLESS OTHERWISE SPECIFIED, do  not 
use supplemental coatings (Paints, greases, or 
other corrosion inhibitors) on threaded  fasteners or 
fastener joint interfaces. Generally, such coatings 
adversely affect the fastener  torque and the joint 
clamping force, and may damage the fastener. When 
you install fasteners,  use the correct tightening 
sequence and specifications. Following these 
instructions can help you  avoid damage to parts 
and systems.

SECTION

3C–2

FRONT SUSPENSION

General Description

The front suspension is designed to allow each wheel to
compensate for changes in the road surface level
without greatly affecting the opposite wheel.  Each
wheel is independently connected to the frame by a
steering knuckle, ball joint assemblies,  and upper and
lower control arms.  The front wheels are held in proper
relationship to each other by two tie-rods which are
connected to steering arms on the knuckles,  and to a
steering unit.
All models have a front suspension system consisting of
control arms, stabilizer bar,  shock absorber and a
torsion bar.  The front end of the torsion bar is attached
to the lower control arm.  The rear of the torsion bar is
mounted into a height control arm at the crossmember.
Vehicle trim height is controlled by adjusting this arm.
Shock absorbers are mounted between the brackets on

the frame and the lower control arms. The lower portion
of each shock absorber is attached to the lower control
arm. The upper portion of each shock absorber extends
through a frame bracket and is secured with two rubber
bushings,  two retainers and a nut.
Ball joint assemblies are bolted to the outer end of the
upper and lower control arm and are attached to the
steering knuckle.
The inner ends of the upper control arm have pressed in
bushings. Bolts, passing through the bushing, attach the
control arm to the frame.  The inner ends of the lower
control arm are attached to the frame by bolts passing
through the bushings.
Side roll of the front suspension is controlled by a spring
steel stabilizer bar.  It is mounted in rubber bushings,
which are held to the frame by brackets.  The ends of
the stabilizer bar are connected to the lower control
arms by links.

Diagnosis

Condition

Possible cause

Correction

Vehicle Pulls

Mismatched or uneven tires.

Replace tire.

Tires not adequately inflated.

Adjust tire pressure.

Broken or sagging springs.

Replace spring.

Radial tire lateral force.

Replace tire.

Improper wheel alignment.

Adjust wheel alignment.

Brake dragging in one wheel.

Repair brake.

Loose, bent or broken front or rear 
suspension parts.

Tighten or replace the appropriate 
suspension part(s).

Faulty shock absorbers.

Replace shock absorber.

Parts in power steering valve 
defective.

Replace power steering unit.

Abnormal or Excessive Tire Wear

Sagging or broken spring.

Replace spring.

Tire out of balance.

Balance or replace tire.

Improper wheel alignment.

Check front end alignment.

Faulty shock absorber.

Replace shock absorber.

Hard driving.

Replace tire.

Overloaded vehicle.

Replace tire and reduce load.

Tires not rotated periodically.

Replace or rotate tire.

Worn or loose road wheel bearings.

Replace wheel bearing.

Wobbly wheel or tires.

Replace wheel or tire.

Tires not adequately inflated.

Adjust the pressure.

Wheel Hop

Blister or bump on tire.

Replace tire.

Improper shock absorber operation.

Replace shock absorber.

FRONT SUSPENSION

3C–3

Shimmy, Shake or Vibration

Tire or wheel out of balance.

Balance wheels or replace tire/or 
wheel.

Loose wheel bearings.

Replace wheel bearing.

Worn steering linkage ball joints.

Replace ball joints.

Worn upper or lower end ball joints.

Replace ball joints.

Excessive wheel runout.

Repair or replace wheel and/or tire.

Blister or bump on tire.

Replace tire.

Excessive loaded radial runout of 
tire/wheel assembly.

Replace tire or wheel.

Improper wheel alignment.

Check wheel alignment.

Loose or worn steering linkage.

Tighten or replace steering linkage.

Loose steering unit.

Tighten steering unit.

Tires not adequately inflated.

Adjust tire pressure.

Loose, bent or broken front or rear 
suspension parts.

Tighten or replace the appropriate 
suspension parts.

Faulty shock absorber.

Replace shock absorber.

Hub bearing preload misadjustment.

Adjust preload.

Parts in power steering valve 
defective.

Replace power steering unit.

Hard Steering

Bind in steering linkage ball studs, 
upper or lower ball joint.

Replace ball joint.

Improper wheel alignment.

Check wheel alignment.

Tire not adequately inflated.

Inflate tires to proper pressure.

Bind in steering column or shaft.

Repair or replace.

Improper power steering system 
operation.

Repair or replace. Refer to Steering 
section.

Too Much Play In Steering

Wheel bearings worn.

Replace wheel bearings.

Loose steering unit or linkage.

Retighten or repair.

Worn or loose steering shaft 
universal joint.

Retighten or replace steering shaft.

Worn steering linkage ball joints.

Replace ball joints.

Worn upper or lower end ball joints.

Replace ball joints.

Poor Steering Wheel Returnability

Bind in steering linkage ball joints.

Replace ball joints.

Bind in upper or lower ball joints.

Replace ball joints.

Bind in steering column and shaft.

Repair or replace.

Bind in steering gear.

Check and repair steering gear.

Improper wheel alignment.

Adjust wheel alignment.

Tires not adequately inflated.

Adjust pressure.

Loose steering wheel nut.

Retighten.

Worn wheel bearing.

Replace.

Condition

Possible cause

Correction