1991 ACURA NSX Service Repair Manual

Wheel Alignmen t
Rear Whee l Alignmen t Adjustin g Procedur e
NOTE:
• NSX/NSX- T fou r whee l alignmen t require s th e us e o f
equipmen t designe d specificall y fo r fou r whee l
independen t suspension s an d capabl e o f immediat e
feedback.
1. Driv e th e ca r o n th e alignmen t rack .
2 . Chec k th e tir e pressur e an d rid e heigh t a s describe d
on pag e 18-6 .
3. Cente r th e steerin g wheel .
Toe
— 1. Measur e th e lengt h o f th e threade d sectio n o n
th e righ t an d lef t to e contro l arms .
Standard : 4 0 m m (1. 6 in )
Differenc e betwee n righ t an d left :
1.0 m m (0.0 4 in) max .
— 2. I f th e measuremen t i s ou t o f specification ,
loose n th e locknuts , an d adjus t th e rea r to e b y
turnin g th e righ t an d lef t tie-rods .
LOCK NUT S55 N- m(5.5 kg-m , 4 0 Ib-ft )
TIE-RO D
LENGTH
Corrosio n resistan t bolt/nu t
Camber
— 1. Loose n th e self-lockin g nu t o n th e rea r lowe r
contro l ar m adjustin g point , the n adjus t th e ca m
positio n s o tha t th e righ t an d lef t graduation s
on th e adjustin g ca m ar e i n contac t wit h
groov e wall .
— 2. Mar k th e ar m in th e positio n whic h align s wit h
th e dia l cente r of the adjustin g cam .
Graduatio n in contac twith groov e wall
SELF-LOCKIN G NU TReplace .125 N- m(12. 5 kg-m , 9 0 Ib-ft )
DIAL CENTE R
Corrosio n resistan t bolt/nu t
4. Measur e th e reading s fo r cambe r an d to e accordin g
t o th e alignmen t equipmen t manufacturer' s
instructions .
5 . Adjus t th e cambe r an d to e a t th e sam e tim e o n on e
sid e o f th e car . Repea t fo r th e othe r sid e of the car .
Rear Specification s
Toe-in: 4. 0 ± 1. 0 m m (0.1 6 ± 0.0 4 in )
Camber : - 1°30 ' ± 30'
ADJUSTIN G CA M
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Runout
1. Rais e th e ca r of f th e ground , an d suppor t i t wit h safe -
t y stand s i n th e prope r location s (se e sectio n 1 ).
2 . Plac e th e dia l gaug e o n eac h fron t an d rea r whee l
rim, an d tur n th e whee l slowl y b y hand . Chec k th e
axia l an d radia l runou t fo r front/rea r wheel .
Fron t an d Rea r Whee l Axia l Runout :
Standard : 0-0. 7
mm (0-0.0 3 in)
Servic e Limit : 2. 0 m m (0.0 8 in )
Fron t an d Rea r Whee l Radia l Runout :
Standard : 0—0. 7 m m (0—0.0 3 in )
Servic e Limit : 1. 5 m m (0.0 6 in )
• I f th e whee l axia l runou t exceed s th e servic e limit ,
chec k th e bearin g en d play .
• I f th e bearin g en d pla y i s withi n th e servic e limit ,
replac e th e wheel .
Bearing En d Pla y
Fron t Whee l En d Play :
Standard : 0 mm (0 in )
Servic e limit : 0.0 5 m m (0.00 2 in ) max .
Rear Whee l En d Play :
Standard : 0 mm (0 in )
Servic e limit : 0.0 5 m m (0.00 2 in ) max .
Replac e th e whee l bearin g wit h ne w on e i f th e servic e
limit i s exceeded .
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Front Suspension

Torque Specifications

CAUTION:

• Replace the self-locking nuts after removal.

• Replace the self-locking bolts if you can easily thread a non-self-locking nut past their nylon locking inserts. (It should

require 1 N-m (0.1 kg-m, 0.7 Ib-ft) of torque to turn the test nut on the bolt).

• The vehicle should be on the ground before any bolts or nuts connected to rubber mounts or bushings are tightened.

• Torque the castle nut to the lower torque specification, then tighten it only far enough to align the slot with the pin

hole. Do not align the nut by loosening.

NOTE: Wipe off any dirt, oil or grease from the threads before tightening the fasteners.

: Corrosion resistant bolt/nut.

FLANGE BOLT

10 x
1.25
mm

60 N-m (6.0 kg-m, 43 Ib-ft)

CASTLE NUT

12 x
1.25
mm

55-65
N-m
(5.5-6.5
kg-m,
40-47
Ib-ft)

SELF-LOCKING NUTS

12 x
1.25
mm

Replace.

95 N-m (9.5 kg-m. 69 Ib-ft)
SELF-LOCKING NUT

10 x
1.25
mm

Replace.

44 N-m (4.4 kg-m, 32 Ib-ft)

SELF-LOCKING NUT

12 x
1.25
mm

Replace.

125 N-m (12.5 kg-m, 90 Ib-ft)

CASTLE NUT

12 x
1.25
mm

55-65
N-m
(5.5-6.5
kg-m,
40-47
Ib-ft)

SELF-LOCKING NUT

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 BOLT

12 x
1.25
mm

95 N-m (9.5 kg-m, 69 Ib-ft)

SELF-LOCKING NUT

12 x
1.25
mm

Replace.

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

10 x
1.25
mm

40-48
N-m

(4.0-4.8
kg-m,

29-35
Ib-ft)

CASTLE NUT

12 x
1.25
mm

55-65
N-m
(5.5-6.5
kg-m,
40-47
Ib-ft)

FLANGE BOLT

12 x
1.25
mm

95 N-m (9.5 kg-m, 69 Ib-ft)
CALIPER BRACKET

MOUNTING BOLT

110 N-m

(11 kg-m, 80 Ib-ft)
CASTLE NUT

12 x
1.25
mm

55-65
N-m
(5.5-6.5
kg-m,

40-47
Ib-ft)
SELF-LOCKING NUTS

12 x
1.25
mm

Replace.

85 N-m (8.5 kg-m. 61 Ib-ft)ProCarManuals.com

Hub Replacemen t
NOTE:
• Us e onl y genuin e Hond a whee l weight s fo r aluminu m wheels . Non-genuin e whee l weight s ma y corrod e an d damag e
th e aluminu m wheels .
• O n th e aluminu m wheels , remov e th e cente r ca p fro m insid e o f th e whee l afte r removin g th e wheel .
• Befor e installin g th e brak e disc , clea n th e matin g surfac e o f th e fron t hu b an d insid e o f th e brak e disc .
• Befor e installin g th e wheel , clea n th e matin g surface s of the brak e dis c an d insid e o f th e wheel .
Corrosio n resistan t bolt/nu t
SELF-LOCKIN G NU T
10 x 1.2 5 mmReplace .
6 5 N- m (6. 5 kg-m , 4 7 Ib-ft ) SPINDL E NU T
26 x 1. 5 m mReplace .
33 5 N- m (33. 5 kg-m , 24 2 Ib-ft )
NOTE : Afte r tightening , us e a drif t t ostak e th e spindl e nu t shoulde r agains tthe spindle .
HUB BEARIN G ASSEMBL YInspect fo r fault ymovemen t an d wear .Replacement , pag e 18-1 7
BRAK E DIS C
Chec k fo r wea r an d rust .Inspection , sectio n 19 .
FRON T HU B
Chec k fo r damag e an d
cracks .
Replacement ,page 18-1 7
WHEE L NU T
12 x 1. 5 m m110 N- m (1 1 kg-m , 8 0 Ib-ft )
FLAT HEA D SCRE W6 x 1. 0 m m10 N- m (1. 0 kg-m , 7 Ib-ft )
CENTER CA P
KNUCKL
E
PULSER
SPLAS H GUAR D
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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