1997 ACURA NSX Service Repair Manual

Front Brak e Pad s
Inspection/Replacemen t
• Neve r us e a n ai r hos e o r dr y brus h t o clea n brak e
assemblies .
• Us e a n OSHA-approve d vacuu m cleane r t o avoi d
breathin g brak e dust .
1 . Loose n th e fron t whee l nut s slightly , the n rais e eac h
sid e o f th e ca r an d suppor t i t o n safet y stand s (se e
pag e 1-10 throug h 1-12 ). Remov e th e fron t wheels .
2 . I f th e brak e pa d thicknes s i s les s tha n servic e limi t
a t ste p 5 , replac e th e fron t pad s a s a set . 3
. Remov e th e tw o brak e hos e mountin g bolts . Remov e
th e tw o calipe r mountin g bolts , an d mov e th e calipe r
ou t o f th e way . Suppor t th e calipe r wit h a piec e o f
wir e s o tha t i t doe s no t han g fro m th e brak e hose .
4 . Remov e th e pa d shims , pa d retainer s an d brak e
pads .
5 . Usin g vernie r calipers , measur e th e thicknes s o f eac h
brak e pa d lining .
Brak e Pa d Thickness :
Standard : 11. 0 m m (0.4 3 in ) max .
Servic e Limit : 1. 6 m m (0.0 6 in )
NOTE : Measuremen t doe s no t includ e pa d backin g
thickness .
(cont'd)
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Inspection/Replacement (cont'd )
Front Brak e Pad s
6. Clea n th e calipe r thoroughly ; remov e an y rust , an d
chec k fo r groove s an d cracks .
7 . Instal l th e pa d retainers . 11
. Pus h i n th e piston s s o tha t th e calipe r wil l fi t ove r
th e brak e pads .
12 . Se t th e calipe r dow n int o position , the n instal l th e
brak e hos e mountin g bolt s an d th e calipe r mount -
in g bolts . Tighte n th e bolt s t o th e specifie d torque .
8 . Appl y Molykot e M7 7 t o bot h side s o f calipe r bracke t
an d th e bac k o f th e pads . Wip e exces s greas e of f
the shim .
9. Instal l th e brak e pads .
• Whe n reusin g th e pads , alway s reinstal l th e
brak e pad s i n thei r origina l position s t o preven t
los s o f brakin g efficiency .
• Contaminate d brak e disc s o r pad s reduc e stop -
pin g ability . Kee p greas e of f th e brak e disc s o r
pads .
NOTE :
• Instal l th e inne r pa d wit h it s wea r indicator fac-
in g upward .
• Appl y Molykot e M7 7 t o th e shim s (se e pag e
19-6 ). Wip e exces s greas e of f th e shims .
10 . Instal l th e brak e pa d shim s correctly . 13
. Depres s th e brak e peda l severa l time s t o mak e sur e
th e brake s work , the n test-driv e th e vehicle .
NOTE: Engagemen t o f th e brak e ma y requir e a
greate r peda l strok e immediatel y afte r th e brak e
pad s hav e bee n replace d a s a set . Severa l applica -
tion s of the brak e peda l wil l restor e th e norma l
peda l stroke .
14 . Instal l th e fron t wheel s an d toqu e th e whee l nuts .
NOTE : Clea n th e matin g surfac e o f th e whee l an d
hu b befor e installin g th e wheel .
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Disassembly
Front Caliper

• Never use an air hose or dry brush to clean brake

assemblies.

• Use an OSHA-approved vacuum cleaner to avoid

breathing brake dust.

CAUTION:

• Do not spill brake fluid on the vehicle; it may damage

the paint; if brake fluid does contact the paint, wash

it off immediately with water.

• To prevent spills, cover the hose joints with rags or

shop towels.

• Clean all parts in brake fluid and air dry; blow out all

passages with compressed air.

1. Remove the banjo bolt, and disconnect the brake

hose from the caliper.

2. Remove the caliper mounting bolts, then remove

the caliper.
4. If necessary, apply compressed air to the caliper

fluid inlet to get the pistons out. Place a shop rag or

wooden block as shown to cushion the pistons

when there are expelled. Use low pressure air in

short spurts.

• Do not place your fingers in front of the piston.

• Do not use high air pressure; use an OSHA-

approved 30 PSI nozzle.

3. Remove the pad spring from the caliper body.
5. Remove the piston boots and piston seals.

CAUTION: Take care not to damage the cylinders.ProCarManuals.com

Reassembly
Front Calipe r
CAUTION :
• Befor e reassembling , chec k tha t al l part s ar e fre e o f
dus t an d othe r foreig n particles .
• Replac e part s wit h ne w one s wheneve r specifie d t o
do so .
• Alway s us e Genuin e Hond a DO T 3 Brak e Fluid . Usin g
a non-Hond a brak e flui d ca n caus e corrosio n an d
decreas e th e lif e o f th e system .
• Mak e sur e n o dir t o r othe r foreig n matte r i s allowe d
t o contaminat e th e brak e fluid .
• D o no t spil l brak e flui d o n th e vehicle ; i t ma y damag e
th e paint ; i f brak e flui d doe s contac t th e paint , was h
i t of f immediatel y wit h water .
1 . Clea n th e piston s an d calipe r bore s wit h brak e fluid ,
an d inspec t fo r wea r an d damage .
2 . Appl y silicon e greas e t o ne w pisto n seals , the n
instal l th e pisto n seal s i n th e cylinde r grooves .
3 . Appl y silicon e greas e t o ne w pisto n boots , the n
instal l th e pisto n boot s i n th e cylinde r grooves .
Run-Out Inspectio n
Front Brak e Dis c
1. Rais e eac h sid e of the vehicle , an d suppor t i t o n
safet y stan d (se e pag e 1-10 throug h 1-12 ). Remov e th e
fron t wheels .
2 . Remov e th e brak e dis c pad s (se e pag e 19-7 ).
3 . Inspec t th e dis c surfac e fo r crack s an d rust . Clean
th e dis c thoroughly , an d remov e al l rust .
4 . Us e th e whee l nut s an d plai n washer s t o hol d th e
dis c securel y agains t th e hub , the n moun t a dia l
indicato r a s shown .
Brake Dis c Runout :
Servic e Limit : 0.1 0 m m (0.00 4 in )
5. I f th e dis c is beyon d th e servic e limit , refinis h it .
Max . Refinishin g Limit : 26. 0 m m (1.0 2 in )
4 . Lubricat e th e calipe r cylinder s an d piston s wit h
brak e fluid , the n instal l th e piston s i n th e cylinder s
wit h th e dishe d en d facin g in .
5 . Reinstal l th e calipe r i n th e revers e orde r o f removal .
Always reinstal l th e brak e pad s in thei r
origina l position s to preven t los s o f brakin g efficiency .
6 . Fil l th e brak e reservoi r up , an d blee d th e brak e sys -
te m (se e pag e 19-11 ). NOTE
: A ne w dis c shoul d b e refinishe d i f it s runou t
i s greate r tha n 0.1 0 m m (0.00 4 in) .
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Thickness an d Parallelis m
Inspectio n
1. Rais e eac h sid e o f th e vehicle , an d suppor t i t o n
safet y stand s (se e pag e 1-10 throug h 1-12 ). Remov e th e
fron t wheels .
2. Remov e th e brak e dis c pad s (se e pag e 19-7 ).
3 . Usin g a micrometer , measur e dis c thicknes s a t
eigh t points , approximatel y 45 ° apar t an d 1 0 m m
(0.4 in ) i n fro m th e oute r edg e o f th e disc .
Brak e dis c thickness :
Standard : 28. 0 m m (1.1 0 in ) max .
Servic e Limit : 26. 0 m m (1.0 2 in )
Brak e Dis c Parallelism :
Th e differenc e betwee n an y thicknes s measure -
ment s shoul d no t b e mor e tha n 0.01 5 m m (0.000 6
in).
4. I f th e dis c i s beyon d th e limit s fo r parallelism , refin -
ish it .
Max . Refinishin g Limit : 26. 0 m m (1.0 2 in )
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Bleeding

CAUTION:

• Always use Genuine Honda DOT 3 Brake Fluid. Using

a non-Honda brake fluid can cause corrosion and

decrease the life of the system.

• Make sure no dirt or other foreign matter is allowed

to contaminate the brake fluid.

• Do not spill brake fluid on the vehicle, it may damage

the paint; if brake fluid does contact the paint, wash

it off immediately with water.

NOTE: The reservoir on the master cylinder must be full

at the start of bleeding procedure, and checked after

bleeding each brake caliper. Add fluid as required.

Always use Genuine Honda DOT 3 Brake Fluid. Using a

non-Honda brake fluid can cause corrosion and

decrease the life of the system.

BLEEDING SEQUENCE:

1. Have someone slowly pump the brake pedal several

times, then apply steady pressure.

2. Loosen the brake bleed screw to allow air to escape

from the system. Then tighten the bleed screw

securely.

3. Repeat the procedure for each wheel in the

sequence shown above, until air bubbles no longer

appear in the fluid.ProCarManuals.com

(cont'd)

FRONT:
Bleeding

REAR:ProCarManuals.com

Master Cylinde r an d Brak e Booste r
Index/Torqu e
BRAKE BOOSTE R
D o no t disassemble .
Tests , pag e 19-1 5
Pushro d Clearanc e Adjustment , pag e 19-1 6
MASTE R CYLINDE R
Inspection , pag e 19-1 4
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