MITSUBISHI 3000GT 1991 Service Manual

33A-1
FRONT
SUSPENSION
CONTENTSM33AA-A
LOWER ARM........................................................8SPECIFICATIONS................................................2
General Specifications....................................2SERVICE ADJUSTMENT PROCEDURES........4....................................2Front Wheel AlignmentService Specifications....................................4
Wheel Bearing Adjustment............................4STABILIZER BAR,................................................10
SPECIAL TOOLS
....................................................3STRUT ASSEMBLY............................................5
TROUBLESHOOTING........................................3

33A-2FRONT SUSPENSION - Specifications
SPECIFICATIONSM33CA-A
GENERAL SPECIFICATIONS
Items
Coil spring identification colorM/T: Orange x 1
ATT: Orange x 2
Shock absorber
Type
Maximum length
Compressed length
Damping force
[at 0.3 m/set. (0.984 ft./set.)]
Hydraulic, cylindricaldouble acting type
485 + 3 (19.09
f .12)335
I 3 (13.19 + .12)Hydraulic, cylindrical double acting type
485
k 3 (19.09 + .12)335 2 3 (13.19 +
.12)
150 (5.91)
NOTE*: OptionHard
: 2,650 + 360 (584 + 79)
Medium : 1,650 t 230 (363 ?I 51)
Soft : 650 f 100 (143 + 22)
Hard
: 1,200 + 170 (265 * 37)
Medium : 1 ,I 50 k 170 (253 +37)Soft :1,000 z!z 150 (220 + 33
SERVICE SPECIFICATIONSM33CB-A
Camber
Caster
Toe-inmm (in.)
Lower arm ball joint starting torque
Nm (in.lbs.)IO-22 (86-191)
Stabilizer link ball joint starting torqueNm (in.lbs.)1.7 - 3.2 (15 - 28)
Steering angle
Inner wheelTSB Revision

FRONT SUSPENSION - Special Tools / Troubleshooting
SPECIAL TOOLS
L
L
Removalof the lower arm ball joint and
Wheel alignment
gauge attachment
Measurement of the wheel alignment
Spring compressorCompression of the front coil spring
MB990799-01Ball joint remover
and installerInstallation of the dust shield
TROUBLESHOOTINGM33EBAA
SymptomProbable causeRemedy
Steering wheel is heavy,Suspension malfunctionvibrates or pulls toBall joint
Adjust orreplace
one sideCoil springWheel alignment
Unbalanced or worn tiresAdjust or replace
Excessive vehicleBroken or deteriorated stabilizer
rollingShock absorber malfunctionReplace
Poor ridingImproper tire inflation pressureAdjust
Broken or deteriorated coil spring
Shock absorber malfunctionReplace
Inclination of vehicleBroken or deteriorated coil springReplace
NoiseLack of lubricationLubricate
Looseness and wear of each partRetighten or replace
Broken coil spring
Shock absorber malfunction
ReplaceTSB Revision
I

33A-4FRONT SUSPENSION - Service Adjustment Procedures
Strut lowermounting bolt(upper)
\/
0 camber@ camber12FOO31
SERVICE ADJUSTMENT PROCEDURES
M33FBAT
FRONT WHEEL ALIGNMENT‘d
TOE-INStandard value: 0 2 3 mm (0 +
.12 in.)
1. Adjust the toe-in by undoing the clips and turning the left
and right tie rod turnbuckles by the same amount (in
opposite directions).
2.After making the adjustments, use a turning radius gauge to
confirm that the steering wheel turning angle is within thestandard value range. (Refer to GROUP 37A
- Service
Adjustment Procedures.)Standard value:
Inner wheel
33”45’Outer wheel
28”21’
CAMBER AND CASTERStandard value:
Camber0” IL 30’
Caster3”55’ IL 30’
Install the special tool by tightening it to the same torque as
that applied to the drive shaft nut.
a
To adjust camber, turn the strut lower mounting bolt (upper).
One graduation is equivalent to about 20’ in camber. Caster hasbeen factory-adjusted to the standard value and requires no
adjustment.
Caution
1.One camber graduation changes toe by about 0.5 mm
(.02 in.). Be sure to adjust toe after camber has been
adjusted.
2.The difference in camber between right and left shouldbe within
O”30’.
WHEEL BEARING ADJUSTMENTM33FCAA
Bearing preload is pre-set to the specified value by design andtherefore can not be adjusted.
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1

FRONT SUSPENSION - Strut Assembly33A-5
STRUT ASSEMBLY
IREMOVAL AND INSTALLATION
‘=Il Adjustment of Wheel Alignment
M33lA- *
6
45 Nm
2
33 ft.lbs.4!
AI$
c3liI7 // ;I jI ’II ;/ ~I: /I /j j
1
-r11Ii /’ I--‘-
Removal steps
1. Brake hose tube clamo mountina bolt
2. Brake hose tube clam;-,3. Fr;;tSs;eed sensor clamp mountmg nut
4. Front speed sensor clamp
tABS>5. Strut lower mounting bolt
6. Strut upper mounting bolt
7. ECS connector

8. Cap
9. Strut assembly
1 TSB Revision

33A-6
FRONT SUSPENSION - Strut Assembly
DISASSEMBLY AND REASSEMBLYM33LE. -
r----
878 Nm
56 ftlbs.
Caution
When applying the grease, take care
that grease does not adhere to the
insulator’s rubber part.Disassembly stepsI.
Dust shield** l *2. Self-lockrng nut
**3. Strut insulator assembly
4. Spring upper seat assembly
5. Upper spring pad
6. Bump rubber
7. Dust shield
8. Front coil spring
9. Strut assembly
12L0254 1
SERVICE POINT OF DISASSEMBLYM33LFAI2. REMOVAL OF SELF-LOCKING NUT
(1) Holding the spring upper seat with the special tool,
loosen the self-locking nut.
CautionThe self-locking nut should be loosened only, not
removed.
(2) Using the special tools, compress the coil spring, andthen remove the self-locking nut.
NOTEInstall the special tools evenly, and so that the max-
imum length will be attained within the installation
range.

FRONT SUSPENSION - Strut Assembly33A-7
INSPECTIONM33LGAFl Check the strut insulator bearing- for wear or rust.
l Check the rubber parts for damage or deterioration.
lCheck the spring for deformation, deterioration or damage.l Check the shock absorber for deformation,
Strutmsulatkx bearing
12FOO80
SERVICE POINTS OF REASSEMBLYM33UlAM
4. INSTALLATION OF SPRING UPPER SEAT ASSEMBLY
(1) Assemble the spring upper seat to the piston rod, fitting
the notch in the rod to the shaped hole in spring seat.(2) Line up the holes in the strut assembly spring lower
seat with the hole in the spring upper seat.
NOTEThe job is easily accomplished with a pipe
[$I 8 mm x
300 mm
(4 .3 in. x 11.8 in.)].
2. INSTALLATION OF SELF-LOCKING NUT
(1) With the coil spring held compressed by the special
tools (MB991 237 and MB991 238). provisionally .tightenthe self-locking nut.
(2) Correctly align both ends of the coil spring with the
grooves in the spring seat, and then loosen the special
tools (MB991 237 and MB991 238).
(3) Using the special tool, tighten the strut insulator at the
specified torque.12FOO20
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33A-8FRONT SUSPENSION - Lower Arm
LOWER ARMMOJNA- _
REMOVAL AND INSTALLATION
100 Nm-Ts. *....
2’ /40 Nm
29 ft.lbs.Removal steps
1. Stabilizer link mounting nut (stabilizer barside)
l *
2. Stabilizer link mounting nut (lower arm side)
3. Stabilizer link
4.
Self-lockrng nut connecting lower arm ball
joint to knuckle
5. Lower arm mounting nut
6. Lower arm mounting bolt
7. Clamp mounting self-locking nut
8. Clamp mounting bolt (small)
9. Clamp mounting bolt (large)
** 10. Lower arm clamp mounting self-locking nut11. Lower arm mounting clamp
12. Lower arm
.- -NOTE
shteld
1210487
13. Stopper
14. Dust shieldFor tlghtenrng points marked with *, ftrst temporarily trghten
15. Rod bushing
them, then ground the vehicle and torque to specificationwhere the vehrcle is empty.TSR Revision

FRONT SUSPENSION - Lower Arm33A-9
MB991 113-0112R0258
12UOO18
LIPS
Dust
shield
12R0487
MB990799-01
Dust shield
Snap ring12L0295
SERVICE POINT OF REMOVALM33NBAO4. REMOVAL OF LOWER ARM BALL JOINT
Using the special tool, disconnect the knuckle from the
lower arm ball joint.
NOTE
(1) Do not remove the nut from the ball joint, but just
loosen it.
(2) Suspend the special tool with a rope to prevent it from
dropping.
INSPECTIONM33NCAFl Check the bushing for wear and deterioration.
l Check the lower arm for bend
,or breakage.
l Check the clamp for deterioration or damage.
l Check the ball joint dust shield for cracks.
l Check all bolts for condition and straightness.
CHECKING BALL JOINT FOR STARTING TORQUEMount two nuts on the ball joint, and then measure the ball
joint starting torque.
Standard value: 10
- 22 Nm (86 - 191 in.lbs.1
BALL JOINT DUST SHIELD REPLACEMENTMJBNEAH(1) Remove the dust shield.
(2) Apply multipurpose grease to the lip and inside of the dust
shield.(3)
C$Fedn the dust shield with special tool until it is fully
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SERVICE POINT OF INSTALLATIONM33NFAP
10. INSTALLATION OF LOWER ARM CLAMP MOUNTING
SELF-LOCKING NUT
Place the lower arm bushing bracket so that its mountingsurface tilts 6”
? 1” with respect to the bottom surface of
the lower arm; then, mount the self-locking nut.

33A-10FRONT SUSPENSION - Stabilizer Bar
STABILIZER BAR
REMOVAL AND INSTALLATION
Pre-removal and Post-installation Operationl Removal and installation of the Front Exhaust Pipe
(Refer to GROUP 15 - Exhaust Pipe and Main Muffler.)l Removal and Installation of the Under Coverl Removal and installation of the Left Member and Right
Member (Refer to GROUP 32 - Right Member, Left
Member and Crossmember.)
3626 ft.lbs.Removal steps
1. Tr&smission stay B*I* l a2. Transfer (AWD)(Refer to GROUP 22 -Transfer.)
3. Stabilizer link
4. Stabilizer bar bracket mounting bolt
l +5. Stabilizer bar bracket
6. Bushing
7. Stabilizer bar
M33TA- -
6
40 Nm29 ftlbs.
I-12L0217
INSPECTIONM33TCAJ
l Check the bushing for wear and deterioration.
l Check the stabilizer bar for deterioration or damage.
l Check the stabilizer link ball joint dust cover for cracks.
l Check all bolts for condition and straightness.
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