ACURA NSX 1991 Service Repair Manual

Front Suspensio n
Hub Replacemen t
1. Loose n th e whee l nut s slightly .
2. Rais e th e fron t o f car , an d suppor t i t o n safet y stand s
in prope r location s (se e sectio n 1 ).
3 . Remov e th e whee l nut s an d wheel .
NOTE: Befor e installin g th e wheel , clea n th e
matin g surface s o f th e brak e dis c an d insid e o f th e
wheel .
WHEE L NU T110 N- m(11 kg-m , 8 0 Ib-ft )
4. Remov e th e brak e hos e mountin g bolts .
FRON T BRAK E HOS E
BRAK E HOS E MOUNTIN G BOLT S
2 2 N- m (2. 2 kg-m , 1 6 Ib-ft )
Corrosio n resistan t bolt/nu t
5. Remov e th e whee l senso r fro m th e knuckl e an d
fron t lowe r contro l arm .
NOTE :
• D o no t disconnec t th e whee l sensor .
• B e carefu l whe n installin g th e sensor s t o avoi d
twistin g wires .
WHEE L
SENSO R
Corrosio n resistan t bolt/nu t
22 N- m(2.2 kg-m , 1 6 Ib-ft )
6. Remov e th e calipe r bracke t mountin g bolts , an d
han g th e calipe r assembl y t o on e side .
CAUTION : T o preven t accidenta l damag e t o th e
calipe r assembl y o r brak e hose , us e a shor t piec e o f
wir e t o han g th e calipe r assembl y fro m th e
undercarriage .
CALIPER BRACKE T MOUNTIN G BOLT S
11 0 N- m (1 1 kg-m , 8 0 Ib-ft )
10 N- m(1.0 kg-m , 7 Ib-ft )
Corrosio n resistan t bolt/nu t
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7. Remove the flat head screws.

Screw two 8 x 12 mm bolts into the disc to push it

away from the hub.

NOTE: Turn each bolt two turns at a time to pre-

vent cocking the disc excessively.

FLAT HEAD SCREW

6 x 1.0 mm

10 N-m (1.0 kg-m, 7 Ib-ft)

BRAKE DISC

8. Remove the hub unit from the knuckle.
8 x 12 mm

BOLTS

SELF-LOCKING NUT

10 x
1.25
mm

Replace.

65 N-m (6.5 kg-m, 47 Ib-ft)

FRONT HUB UNIT

Corrosion resistant bolt/nut
Front Wheel Bearing Replacement:

1. Raise the locking tab on the spindle nut, then remove

the
nut.

SPINDLE NUT

26 x 1.5 mm

Replace.
Unstake

2. Remove the pulser using a commercially-available

bearing puller.

PULSER
TWO-JAW

PULLER

(Commercially

available)ProCarManuals.com

Front Suspensio n
Hub Replacemen t
3. Separat e th e whee l bearin g fro m th e hu b usin g th e
specia l tool s an d a press .
CAUTION : Hol d ont o th e hu b t o kee p it fro m fall -
in g whe n presse d clear .
HUB DIS /ASSEMBL Y BAS E07GAF-SD4070 0
Press
WHEEL
BEARIN G
Replace .
4. Remov e th e outboar d bearin g inne r rac e fro m th e
hu b a s shown .
Press
INNE R RAC E
Replace .
NOTE: Was h th e bearin g an d hu b thoroughl y i n
hig h flas h poin t solven t befor e reassembly . NOTE
: Replac e th e bearin g wit h a ne w on e afte r
removal .
5 . Pres s a ne w whee l bearin g int o th e hu b usin g th e
specia l tool s show n an d a press .
HUB ASSEMBL Y
DRIVE R ATTACHMEN T
07GAF-SD4020 0
Press
SUPPOR T BAS E07965 - SD9010 0
6 . Instal l th e pulser .
NOTE : B e sur e th e pulse r engage s wit h th e pi n o n
th e spindle .
PULSER
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7. Tighten the new spindle nut to specified torque,

then stake the spindle nut shoulder against the

spindle.

335 N-m

(33.5 kg-m, 242 Ib-ft)

Stake

After tightening, use a

drift to stake spindle

nut shoulder against

the spindle.ProCarManuals.com

Knuckle/Control Arms/Complianc e Pivo t
Illustrate d Inde x
Overal l Suspensio n NOTE : Alig n th e whit e lin e o n th e stabilize r ba r wit h th e
bushin g end , an d instal l th e stabilize r bar .
NOTE :
• Wip e of f th e greas e befor e tightenin g th e nu t a t th e bal l joint .
• Torqu e specifications , se e pag e 18-14 .
Corrosio n resistan t bolt/nu t
STABILIZE R BA RChec k fo r damage .
*UPPE R CONTRO L BAL L JOIN T
Inspec t fo r fault ymovemen t an d wear . STABILIZE
R LIN K
Inspect for fault y
movemen t an d wear .
COMPLIANC E PIVO TASSEMBL YCheck fo r damag e o r cracks .
Chec k fo r deterioratio n an d damag e UPPE
R CONTRO L AR M
Chec k fo r damag e
an d cracks .
COMPLIANC E PIVO T
LOWE R BRACKE TCheck fo r damag e an dcracks .
FLANG E BOL T8 x 1.2 5 mm22 N- m (2. 2 kg-m , 1 6 Ib-ft )
* UPPE R AR M BAL LJOINTInspec t fo r fault ymovemen t an d
wear .
LOWE R CONTRO L AR M
Chec k fo r damag e an d crack s
* LOWE R CONTRO L AR M BAL L JOIN T
Inspec t fo r fault ymovemen t an d wear .
KNUCKL ECheck fo r damag e
an d cracks .
LOWERBALL JOIN TInspec t fo r fault ymovemen t an d wear .
NOTE: Replac e th e join t boo t i f an y ar e damaged . Th e part s marke d wit h a n asteris k (* ) hav e a retaine r attachin g
the bal l joints . Replac e th e retaine r wheneve r th e boo t i s replaced .
CAUTION: D o no t remov e th e arms , knuckle , an d complianc e pivo t b y strikin g the m wit h a hammer , an d tak e car e
not t o dro p them .
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Removal
1. Remov e th e fron t whee l an d bearin g uni t assembly
(se e pag e 18-15 ).
2 . Remov e th e splas h guar d fro m th e knuckle .
SPLASH GUAR D
10 N- m(1.0 kg-m , 7 Ib-ft )
Corrosio n resistan t bolt/nu t
3. Remov e th e lowe r contro l ar m guard .
10 N- m(1.0 kg-m , 7 Ib-ft )
LOWE R AR M GUAR D
Corrosio n resistan t bolt/nu t
NOTE: Us e th e bal l join t remover s t o separat e th e bal l
joint s fro m th e suspensio n o r steerin g arm .
CAUTION :
• B e carefu l no t t o damag e th e bal l join t boot .
• Torqu e th e castl e nu t t o th e lowe r torqu e specifica -
tion , the n tighte n it onl y fa r enoug h t o alig n th e slo t
wit h th e pi n hole . D o no t alig n th e nu t b y loosening .
4 . Clea n an y dir t o r greas e of f th e bal l joint .
5 . Remov e th e cotte r pi n fro m th e steerin g arm , an d
remov e th e nut .
6 . Appl y greas e t o th e specia l too l o n th e area s
shown . Thi s wil l eas e installatio n o f th e too l an d
preven t damag e t o th e pressur e bol t threads .
Apply greas e here . PRESSUR
E BOL T
7. Instal l a 1 2 m m he x nu t o n th e bal l joint . B e sur e
that th e he x nu t i s flus h wit h th e bal l join t pi n en d to
preven t damag e t o th e threade d en d o f th e bal l
joint.
8. Us e th e bal l join t remover , 2 8 mm , a s shown .
Insert th e jaw s carefully , makin g sur e yo u d o no t
damag e th e bal l join t boot . Adjus t th e ja w spacin g
by turnin g th e pressur e bolt .
NOTE : I f necessary , appl y penetratin g typ e lubri -
cant t o loose n th e bal l joint .
CASTL E NU T40-4 8 N- m
BAL L JOIN T REMOVER , 2 8 m m07MA C-SL0020 0
(4.0-4.8 kg-m, 29-35 Ib-ft)
COTTE R
PINReplace .On reassembly , ben dthe pi n a s shown .Corrosio n resistan t bolt/nu t
Knuckle/Control Arms/Compliance Pivot
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Knuckle/Control Arms/Complianc e Pivo t
Remova l
9. Onc e th e too l i s i n place , tur n th e adjustin g bol t a s
necessar y t o mak e th e jaw s parallel . The n hand -
tighte n th e pressur e bolt , an d rechec k th e jaw s t o
mak e sur e the y ar e stil l parallel .
PRESSUR E BOL T
ADJUSTIN G BOL T
10. Wit h a wrench , tighte n th e pressur e bol t unti l th e
bal l join t shaf t pop s loos e fro m th e steerin g arm .
Wea r ey e protection . Th e bal l join t
ca n brea k loos e suddenl y an d scatte r dir t o r othe r
debri s in you r eyes .
11 . Remov e th e tool , the n remov e th e nu t fro m th e en d
o f th e bal l join t an d pul l th e bal l join t ou t o f th e
steering/suspensio n arm . Inspec t th e bal l join t boot ,
an d replac e i t i f damaged . 12
. Remov e th e cotte r pi n an d lowe r contro l ar m bal l
joint nut .
13. Instal l th e 1 2 m m he x nu t o n th e bal l joint . B e sur e
that th e 1 2 m m he x nu t i s flus h wit h th e bal l join t
pin end , o r th e threade d sectio n o f th e bal l join t pi n
migh t b e damage d b y th e bal l join t remover .
14 . Us e th e bal l join t remover , 3 2 mm , a s show n o n pag e
18-2 1 t o separat e th e bal l join t an d lowe r contro l
arm.
NOTE : I f necessary , appl y penetratin g typ e lubri -
cant t o loose n th e bal l joint .
CASTL E NU T12 x 1.2 5 mm55-6 5 N- m(5.5-6. 5 kg-m, 40-47 Ib-ft)
COTTE R BAL L JOIN TPIN REMOVER , 3 2 m mReplace . 07MAC - SL0010 0On reassembly ,bend th e cotte r pi n a s shown .
Corrosio n resistan t bolt/nu t
1 5 . Remov e th e cotte r pi n an d th e uppe r bal l join t nut .
16 . Instal l th e 1 2 m m he x nu t o n th e bal l joint . B e sur e
that th e 1 2 m m he x nu t i s flus h wit h th e bal l join t
pin end , o r th e threade d sectio n o f th e bal l join t pi n
migh t b e damage d b y th e bal l join t remover .
17 . Us e th e bal l join t remover , 3 2 mm , a s show n o n pag e
18-2 1 t o separat e th e bal l join t an d uppe r arm .
NOTE : I f necessary , appl y penetratin g typ e lubri -
can t t o loose n th e bal l joint .
BALL JOIN T REMOVER , 3 2 m m07MA C - SL0010 0COTTER PI NReplace .On reassembly , ben d th ecotte r pi n a s shown .
CASTL E NU T12 x 1.2 5 mm55-6 5 N- m(5.5-6. 5 kg-m,40-47 Ib-ft )
Corrosio n resistan t bolt/nu t
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18. Remove the knuckle.

KNUCKLE

19. Separate the lower control arm and damper by

removing the damper mounting bolt.

DAMPER

MOUNTING

BOLT
Corrosion resistant bolt/nut

SELF-LOCKING NUT

12 x
1.25
mm

Replace.

95 N-m (9.5 kg-m, 69 Ib-ft)
20. Hold the ball pin of the stabilizer link with a hex

wrench, and loosen the self-locking nut.

STABILIZER

LINK

LOWER CONTROL

ARM

HEX WRENCH

SELF-LOCKING NUT

12 x
1.25
mm

Replace.

85 N-m (8.5 kg-m, 61 Ib-ft)

Corrosion resistant bolt/nut

21. Disconnect the stabilizer link from the lower control

arm.ProCarManuals.com

Knuckle/Control Arms/Complianc e Pivo t
Remova l
22. Remov e th e cotte r pi n an d lowe r ar m bal l join t nut .
23 . Instal l th e 1 2 m m he x nu t o n th e bal l joint . B e sur e
that th e 1 2 m m he x nu t i s flus h wit h th e bal l join t
pin end , o r th e threade d sectio n o f th e bal l join t pi n
migh t b e damage d b y th e bal l join t remover .
24 . Us e th e bal l join t remover , 3 2 mm , a s show n o n pag e
18-2 1 t o separat e th e bal l join t an d complianc e pivot .
NOTE : I f necessary , appl y penetratin g typ e lubri -
can t t o loose n th e bal l joint .
CAUTION : Avoi d damagin g th e bal l join t boot .
CASTL E NU T12 x 1.2 5 mm55-6 5 N-m(5.5-6. 5 kg-m, 40-47 Ib-ft)
COTTE RPINReplace .On reassembly ,bend th e cotte r pi nas shown .
BALL JOIN T REMOVER , 3 2 m m07MAC -SL0010 0Corrosio n resistan t bolt/nu t
25. Remov e th e lowe r contro l ar m b y removin g th e ad -
justin g bolt .
SELF-LOCKIN G NU T12 x 1.2 5 mmReplace .125 N- m(12. 5 kg-m , 9 0 Ib-ft )
ADJUSTIN GBOLT
ADJUSTIN G CA M
LOWE R CONTRO L AR M
Corrosio n resistan t bolt/nu t
26. Remov e th e cotte r pi n an d uppe r ar m bal l join t nut .
27 . Instal l th e 1 2 m m he x nu t o n th e bal l joint . B e sur e
that th e 1 2 m m he x nu t i s flus h wit h th e bal l join t
pin end , o r th e threade d sectio n o f th e bal l join t pi n
migh t b e damage d b y th e bal l join t remover .
28 . Us e th e bal l join t remover , 3 2 mm , a s show n o n pag e
18-2 1 t o separat e th e bal l join t an d complianc e pivot .
NOTE : I f necessary , appl y penetratin g typ e lubri -
can t t o loose n th e bal l joint .
CAUTION : Avoi d damagin g th e bal l join t boot .
CASTL E NU T12 x 1.2 5 mm55-6 5 N-m(5.5-6. 5 kg-m, 40-47 Ib-ft )
BALL JOIN T REMOVER , 3 2 m m07MA C-SL0010 0Corrosio n resistan t bolt/nu t
COTTER PI NReplace .On reassembly ,bend th e cotte rpin a s shown .
29 . Remov e th e stabilize r ba r bracke t fro m th e com -
plianc e pivot .
30 . Remov e th e thre e lowe r complianc e pivo t bolts .
STABILIZE RBAR
COMPLIANC E PIVO TASSEMBL Y
FLANGE BOL T8 x 1.2 5 mm22 N- m(2.2 kg-m , 1 6 Ib-ft )
FLANG E BOL T12 x 1.2 5 mm95 N- m(9.5 kg-m , 6 9 Ib-ft )
Corrosio n resistan t bolt/nu t
ProCarManuals.com

31. Remove the compliance pivot assembly by remov-

ing the bolts and nuts shown.

32. Remove the upper control arm assembly by remov-

ing the flange bolt shown.

SELF-LOCKING

NUTS

12 x
1.25
mm

Replace.

95 N-m

(9.5 kg-m, 69 Ib-ft)

FLANGE BOLT

10 x
1.25
mm

60 N-m

(6.0 kg-m, 43 Ib-ft)
FLANGE BOLTS

10 x
1.25
mm

60 N-m

(6.0 kg-m, 43 Ib-ft)

Corrosion resistant bolt/nut
NOTE:

• Install the upper control arm on the frame before

installing the compliance pivot assembly.

• Install the compliance pivot bolts and nuts. Tor-

que them to the specified torque in the order.

1. Loosely tighten the flange bolt

2. Insert the stud bolts into the frame.

3. Install the three flange bolts and tighten to the

specified torque.

4. Install the two flange bolts and tighten to the

specified torque.

5. Tighten the flange bolt

6. Install the 12 mm self-locking nuts and tighten

to the specified torque.

STUD BOLT

FLANGE BOLTS

10 x
1.25
mm

60 N-m

(6.0 kg-m, 43 Ib-ft)

FLANGE BOLTS

12 x
1.25
mm

95 N-m

(9.5 kg-m, 69 Ib-ft)
SELF-LOCKING

NUTS

12 x
1.25
mm

Replace.

95 N-m

(9.5 kg-m, 69 Ib-ft)

UPPER CONTROL

ARM

FLANGE BOLT

12 x
1.25
mm

95 N-m

(9.5 kg-m, 69 Ib-ft)

Corrosion resistant

bolt/nut
COMPLIANCE

PIVOT ASSEMBLYProCarManuals.com