1991 ACURA NSX Service Repair Manual

Illustrated Inde x
CAUTION : D o no t tr y to disassembl e th e powe r steerin g gearbox . I f th e gearbo x is faulty , replac e it a s a n assembly .
Corrosion resistan t bolt/nu t10 x 97 m mFLANG E BOL T
GEARBO X ASSEMBL Y STEERIN
G
GEARBO X BRACKE T
CUSHION BChec k fo r damage .
10 x 84 m mFLANG E BOL T60 N- m(6.0 kg-m , 4 3 Ib-ft )
10 x 97 m mFLANG E BOL T60 N- m(6.0 kg-m , 4 3 Ib-ft )
MOUN T BAS E
10 m m FLANG E NU T60 N- m(6.0 kg-m . 4 3 Ib-ft )
FLANG E BOL T10 N- m(1.0 kg-m , 7 Ib-ft )
GROUN D CABL E
STO P WASHE R
LOC K WASHE R
Replace.RACK EN D
TIE-ROD EN D
STEERIN
G GROMME T
Chec k fo r damage .
WIR E HARNES S STA Y
1 0 m m FLANG E NU T
60 N- m(6.0 kg-m , 4 3 Ib-ft )
FLANG E BOL T10 N- m(1.0 kg-m , 7 Ib-ft )
MOUN T COLLE R
MOUNT BUSHIN GCheck fo r damage .
FLANGE BOL T
10 N- m(1.0 kg-m , 7 Ib-ft )
TERMINA L
GUAR D
COTTE R PI N
Replace .
CASTL
E NU T
44 N- m(4.4 kg-m , 3 2 Ib-ft )
TUB E CLAM P
BOOT
Replace .
SE T RIN G
STEERIN
G GREAS E
(Honda P/ N 08733-B070E )Coat th e insid e o f th e boot .
SILICON E GREAS E
Coa t th e slidin g surfac e
o f th e rac k end .
TIE-RO DLOCKNU T44 N.m(4.4 kg-m , 3 2 Ib-ft )
5
5 N- m (5. 5 kg-m , 4 0 Ib-ft )
BOO T
Chec k fo r damage .
ProCarManuals.com

Steering Gearbo x
Inspectio n
1. Carefull y clam p th e gearbo x i n a vis e wit h sof t jaws .
2 . Remov e th e boo t bands .
BOOT BAN DReplace .
3. Pul l th e boot s awa y fro m th e end s o f th e gearbox ,
the n unben d th e tie-ro d loc k washers .
4 . Hol d th e rac k wit h a wrench , an d unscre w th e tie -
rod s wit h anothe r wrench .
LOCK WASHE RReplace.
• Preloa d inspection :
Slide th e steerin g rac k in th e cylinde r unti l th e en d o f
th e rac k project s 6 0 m m (2. 4 in ) fro m th e cylinde r
end . Inspectio n is mad e nea r thi s rac k position .
CYLINDE R
RACK
Instal l th e specia l too l o n th e pinio n shaf t an d chec k
th e preloa d wit h a sprin g scale .
I f th e preloa d i s ou t o f th e specification , adjus t th e
rac k guide .
Preloa d 3 0 N (3 kg , 6. 6 Ibs ) maximu m
STEERIN G INSPECTIO N AR M0797 4 - SD9000 0
Rac k guid e scre w adjustment :
— Loose n th e rac k guid e scre w locknut .
— Tighten , loose n an d retighte n th e rac k guid e scre w
tw o time s t o 4 N- m (0. 4 kg-m , 2. 9 Ib-ft) , the n bac k
it of f 20 °
ProCarManuals.com

Retighten th e locknu t whil e holdin g th e rac k
guid e scre w wit h a wrench .
LOCKNU T25 N- m (2. 5 kg-m , 1 8 Ib-ft )
LOCKNU T WRENCH , 4 0 m m0791 6 - SA5000 1 Tie-ro
d installation :
5 . Scre w eac h rac k en d int o th e rac k whil e holdin g th e
loc k washe r s o it s tab s ar e i n th e slot s i n th e rac k
end.
NOTE : Instal l th e stoppe r washe r wit h th e cham -
fere d sid e facin g out .
LOC K WASHE RReplace.
TAB
RAC K EN D STOPPE R WASHER
6. Tighte n th e rac k en d securely , the n ben d th e loc k
washe r bac k agains t th e fla t o n th e flang e a s shown .
NOTE : Coa t th e stoppe r washe r wit h greas e suffi -
ciently .
RACK EN D55 N- m(5.5 kg-m , 4 0 Ib-ft )
SLOT
ProCarManuals.com

Steering Gearbo x
Inspectio n
7. Instal l th e boot s o n th e rac k en d wit h th e tub e clamps .
NOTE:
• Coa t th e rac k en d an d insid e o f th e boo t wit h th e
grease .
• Befor e installin g th e boot , b e sur e tha t th e pres -
sur e insid e o f th e boo t i s th e atmospheri c pres -
sure.
• Instal l th e boo t ban d wit h th e rac k i n th e straigh t
ahea d conditio n (righ t an d lef t tie-rod s ar e equa l
i n length) .
BOOT
TUBE CLAM P
STEERIN G GREAS E(Honda P/ N 08733-B070E )Coat th e insid e o f th e boot .
SILICON E GREAS ECoat th e slidin g surfac eof th e rac k end .
8. Instal l th e ne w boo t band s o n th e boot , an d ben d
bot h set s o f lockin g tabs . Lightl y ta p o n th e double d
portion s t o reduc e thei r height .
NOTE : Afte r assembling , slid e th e rac k righ t an d
lef t t o b e certai n tha t th e boot s ar e no t deforme d o r
twisted .
LOCKIN G TAB S
BOOT BAN DReplace .
9. I f th e tie-ro d end s wer e removed , instal l th e tie-rod s
o n th e righ t an d lef t rac k end s an d scre w the m in
unti l th e threade d sectio n is 1 1 m m (0. 4 in ) i n length .
11 m m (0. 4 in)
LOCKNU THand tighten .
TIE-RO D EN D
10. Instal l th e gearbo x an d th e fron t crossbea m in th e
revers e orde r remova l (se e pag e 17-57 ).
11 . Chec k th e whee l alignmen t an d adjus t i f necessar y
(se e sectio n 18 ).
ProCarManuals.com

Ball Join t Boo t
Replacemen t
1. Remov e th e se t rin g an d th e boot .
CAUTION : D o no t contaminat e th e boo t installa -
tio n sectio n wit h grease .
2 . Pac k th e interio r o f th e boo t an d li p wit h grease .
BOOT INSTALLATIO N SECTIO N
3. Wip e th e greas e of f th e slidin g surfac e of the bal l
pin , the n pac k th e lowe r are a wit h fres h grease .
CAUTION :
• Kee p greas e of f th e boo t installatio n sectio n an d
th e tapere d sectio n o f th e bal l pin .
• D o no t allo w dust , dirt , o r othe r foreig n material s
t o ente r th e boot .
BALL PI N TAPERE DSECTION
BOO T INSTALLATIO N
SECTIO N
4. Instal l th e boo t i n th e groov e o f th e boo t installatio n
sectio n securely , the n blee d air . 5
. Inser t th e specia l too l int o th e thread s i n th e bal l pin ,
and alig n th e en d o f th e too l wit h th e groov e in th e
boot . Slid e th e se t rin g ove r th e too l an d int o position .
SET RIN G
CAUTION : Afte r installin g th e boot , chec k th e bal l
pi n tapere d sectio n fo r grease . Wip e it i f necessary .
LIP
BAL L JOIN T BOO T CLI P GUID E07MAG - SL0010 0
Adjus t th e dept h b y
turnin g th e tool .
BOO T
ProCarManuals.com

EPS Contro l Uni t
Replacemen t
SRS component s ar e locate d i n thi s area . Revie w th e
SR S componen t locations , precautions , an d procedure s
i n th e SR S sectio n 24 befor e performin g repair s o r ser -
vice .
1 . Remov e th e dashboar d lowe r cover .
DASHBOAR D LOWE R COVE R
2. Tur n u p th e floo r mat , an d remov e th e speake r cove r
an d speaker .
SPEAKE R COVE R
SPEAKE R
3. Disconnec t th e connector s fro m th e EP S contro l
unit , the n remov e it .
10 N- m (1. 0 kg-m , 7 Ib-ft )
3P CONNECTOR SEPS CONTRO L UNI T
18P CONNECTO R
10 N- m (1. 0 kg-m , 7 Ib-ft )
4. Installatio n is th e revers e o f remova l procedure .
NOTE : Afte r installation , star t th e engin e an d mak e
sur e tha t th e EP S indicato r ligh t goe s off .
ProCarManuals.com

Special Tool s
18-33, 18-34
18-18, 18-34
18-18, 18-3318-26, 18-39
18-21, 18-22,
18-24, 18-37
18-21, 18-3618-26 18-18 , 18-3418-39
ProCarManuals.com

Component Locations
Index
Front Suspension:FRONT DAMPERRemoval, page 18-27Disassembly/Inspection, page 18-27Reassembly, page 18-29Installation, page 18-29Disposal . . . . . . . . . 18-44
FRONT SUSPENSION ASSEMBLY• Knuckle/Control Arms/ Compliance PivotRemoval, page 18-21• Illustrated Index, page 18-20• Ball Joint Boot Replacement,page 18-26
FRONT HUBReplacement, page 18-15Rear Suspension:
REAR DAMPERRemoval, page 18-40Disassembly/Inspection, page 18-42Reassembly, page 18-44Installation. page 18-44Disposal . . . . . . . . . 18-44
REAR HUBReplacemen t, page 18-31
ProCarManuals.com