1991 ACURA NSX washer fluid

9. Relieve fuel pressure by loosening the service bolt
on the fuel filter about one turn (see section 11).
Do not smoke while working on the
fuel
system.
Keep open flame away from work
area. Drain fuel only into an approved container.
10. Remove the fuel feed pipe and fuel return hose.
11. Remove the wire harness cover, then remove the fuel pipe clamp.

22 N·m
(2.2 kg-m,
16 Ib-ft)

WIRE HARNESS

COVER
6 x 1.0 mm

12 N·m
(1.2 kg-m,

9 lb-ft)

FUEL FEED
PIPE

WASHERS
Replace.

FUEL RETURN

HOSE

12. Remove the brake booster vacuum hose and evapo- rative emission (EVAP) control canister hose.

BRAKE BOOSTER

VACUUM HOSE

EVAP CONTROL

CANISTER HOSE
13. Remove the expansion tank cap.

14. Raise the hoist to full height.
15. Drain the engine coolant (see page
10-5).
Loosen the drain plug from the radiator lower
tank. Remove two drain bolls from the water pipes.
Reinstall the drain bolts with new washers.
Loosen the front and rear engine drain bolts to
drain engine coolant from the cylinder heads.
Connect rubber hoses to the drain bolts.
16. Drain the transmission oil/fluid. Reinstall the drain plug with a new washer.
17. Drain the engine oil. Reinstall the drain plug with a
new washer.

18. Lower the hoist, then remove the air cleaner hous-

ing (see page 6-25 ('91-'93 Mode ls),or('95-'96 Models).

19. Disconnect two hoses, then remove the expansion

tank.

6 x 1.0 mm

10 N·m
11.0 kg-m,

7 lb-ft)

EXPANSION

TANK

WATER BYPASS

HOSES
(cont'd)ProCarManuals.com

Differential
Reassembl y
1. Instal l th e clutc h disc , clutc h plate , centra l gear ,
an d carrie r assembly .
NOTE : Lubricat e th e clutc h dis c surfac e wit h
transmissio n fluid .
CARRIE R ASSEMBL Y
CENTRAL GEA R
CLUTC H PLAT E
CLUTC H DIS C
DIFFERENTIA LHOUSINGCOVER
2. Instal l th e fina l drive n gear .
NOTE : Alig n th e mar k o n th e differentia l housin g
cove r wit h th e mar k o n th e fina l drive n gear .
FINALDRIVE NGEAR
MAR K
MAR K
3. Instal l th e 10 2 m m washer , clutc h discs , clutc h
plates , an d 11 2 m m thrus t shim .
NOTE :
• Lubricat e th e clutc h disc s wit h transmissio n fluid .
• Positio n th e 11 2 m m thrus t shi m wit h th e
thicknes s siz e mar k facin g awa y fro m th e clutc h
discs .
Thicknes s Siz eMar k
CLUTC H PLATE S 11
2 m m THRUS T
SHIM
CLUTC H DISC S
10 2 m m WASHE R
4. Instal l th e 6 0 m m washer , sprin g plate , an d stoppe r
plate .
STOPPE R PLAT E
SPRING PLAT E
6 0 m m WASHE R
DIFFERENTIA LHOUSING
ProCarManuals.com

Reassembly
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 .
• Us e onl y clea n DOT 3 o r 4 brak e fluid .
• 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 car ; 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 ,
and 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 in -
stal 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 in -
stal l th e pisto n boot s in th e cylinde r grooves .
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
with 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 .
6 . Fil l th e brak e reservoi r up , an d blee d th e brak e
system (se e pag e 19-10 ).
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) .
Fron t Brak e Dis c
Run-Ou t Inspectio n
1. Rais e eac h sid e o f th e car , an d suppor t i t o n safet y
stand (se e pag e 1-9 throug h 1-11 ). Remov e th e fron t
wheels .
2. Remov e th e brak e dis c pad s (se e pag e 19-6 ).
3 . Inspec t th e dis c surfac e fo r crack s an d rust . Clea n
the dis c thoroughly , an d remov e al l rust .
4. Us e suitabl e nut s (1 2 x 1. 5 mm ) an d plai n washer s
to 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 :
Service Limit : 0.1 0 m m (0.00 4 in )
5. I f th e dis c i s beyon d th e servic e limit , refinis h it .
Max . Refinishin g Limit : 26. 0 m m (1.0 2 in )
Front Caliper
ProCarManuals.com

Reassembly
CAUTION:
• Mak e sur e al l part s ar e clea n befor e reassembly .
• Us e onl y ne w replacemen t parts .
• Us e onl y clea n DOT 3 o r 4 brak e fluid .
• D o no t allo w dir t o r othe r foreig n matte r t o con -
taminat e th e brak e fluid .
• Avoi d spillin g brak e flui d o n painted , plasti c o r rubbe r
surface s a s i t ca n damag e th e finish . Was h spille d
brak e flui d of f immediatel y wit h clea n water .
1 . Pac k al l cavitie s o f th e needl e bearin g wit h a com -
mercially-availabl e assembl y lube .
2. Coa t th e ne w ca m boo t wit h a commercially -
available assembl y lub e an d instal l i n th e caliper .
3 . Appl y commercially-availabl e assembl y lub e t o th e
pi n contactin g are a o f th e cam , an d instal l th e ca m
an d leve r assembl y int o th e calipe r body .
4. Instal l th e retur n spring .
CAUTION :
• Whe n th e ca m an d leve r wer e separated , b e
sur e t o assembl e the m befor e installin g th e ca m
i n th e calipe r body . Instal l th e leve r an d sprin g
washer , appl y lockin g agen t t o th e threads , an d
tighte n th e parkin g nu t whil e holdin g th e leve r
wit h a vise .
• Avoi d damagin g th e ca m boo t sinc e i t mus t b e
installe d befor e th e cam .
• Whe n installin g th e cam , d o no t allo w th e ca m
boo t lip s t o tur n outsid e in .
5. Instal l th e pi n in th e cam .
6. Instal l a ne w O-rin g o n th e sleev e piston .
7. Instal l th e sleev e pisto n s o th e hol e in th e botto m of
the pisto n is aligne d wit h th e pi n in th e cam , an d
the tw o pin s o n th e pisto n ar e aligne d wit h th e hole s
in th e caliper .
ProCarManuals.com

Power Uni t
Torque/Inspectio n
CAUTION:
• D o no t attemp t t o disassembl e th e powe r uni t ex -
cep t fo r thos e component s show n in thi s illustration .
• D o no t spil l brak e flui d o n th e car ; 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 .
• T o preven t spills , cove r th e hos e joint s wit h rag s o r
sho p towels .
• Clea n al l part s i n brak e flui d an d ai r dry ; blo w ou t al l
passage s wit h compresse d air . 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 .
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 reus e th e draine d fluid .
Us e onl y clea n DO T 3 o r 4 brak e fluid .
BANJ O BOL T(To modulator )35 N- m (3. 5 kg-m , 2 5 Ib-ft )
SEALIN GWASHER SReplaceBANJO BOL T35 N- m (3. 5 kg-m , 2 5 Ib-ft )
MAINTENANC EBLEEDER9 N- m (0. 9 kg-m , 6. 5 Ib-ft )
POWE R UNI TDo no t disassembl e
PUMP BRACKE T
6 m m FLANG E BOL T10 N- m (1. 0 kg-m , 7 Ib-ft )
ProCarManuals.com

Accumulator/Pressure Switch

Index/Torque
CAUTION: Do not spill brake fluid on the car; it may damage the
paint; if brake fluid does contact the paint, wash it
off immediately with water.
To prevent spills, cover the hose jpints with rags or shop towels.
Clean all parts in brake fluid and air dry; blow out all passages with compressed air.
Before reassembling, check that all parts are free of
dust and other foreign particles. Replace parts with new ones whenever specified to

do so.

Before disassembling the accumulator unit, bleed the
high-pressure brake fluid out from the system using
the Bleeder T-wrench (see page 19-62('91-'92)('93-'96)

the Bleeder

*: CORROSION RESISTANT BOLT

Make sure no dirt or other foreign matter is allowed
to contaminate the brake fluid. Do not reuse the drained fluid.
Use only clean DOT 3 or 4 brake fluid.

NOTE: Replace the 0-ring with a new one before

reassembly. The accumulator contains high-pressure
nitrogen gas, do not puncture, expose to flame, or at-
tempt to disassemble the accumulator or it may ex-
plode; severe personal injury may result.

19 N·m
(1.9 kg-m,

14 Ib-ft)

PRESSURE SWITCH

SEALING WASHERS

Replace.

BANJO BOLT

35 N·m (3.5 kg-m, 26 Ib-ft)
6 x 1.0 mm

9 N·m
(0.9 kg-m,7 Ib-ft)
ACCUMULATOR

Disposal, page 19-68
* 6 x 1.0 mm

10 N·m (1.0 kg-m, 7 Ib-ft)

O-RING

Replace.
PRESSURE SWITCH

JOINT
6 x 1.0 mm

10 N·m
(1.0 kg-m,

7 Ib-ft)ProCarManuals.com

Wipers/Washers
Component Location Index
SRS components are located in this area. Review theSRS component locations, precautions, and procedures
in the SRS section (24) before performing repairs or ser-
vice.
UNDER-HOOD RELAY BOX BWIPER INTERMITTENT
RELAY

Test, page 23-291 ('94-'96) ('93) ('91-'92)

WIPER LOW/HIGH RELAY

Test, page 23-292 ('94-'96) ('93) ('91-'92)

WASHER RELAY

Test, page 23-292 ('94-'96) ('93) ('91-'92) WINDSHIELD WIPER

ARMS/BLADES

WASHER FLUID
RESERVOIR

Replacement, page 23-297
('94-'96) ('91-'93)
WINDSHIELD

WASHER MOTOR
Test, page 23-297
('94-'96) ('91-'93) WINDSHIELD WIPER MOTOR
Test, page 23-293 ('94-'96) ('93) ('91-'92)
Replacement, page 23-294 ('93-'96)('91-'92) COMBINED OPERATION
WIPER/WASHER CIRCUIT

(In the integrated control unit)

Test, page 23-169 ('94-'96) ('91-'93)

Description

The system is equipped with an intermittent relay, a low relay and a high relay. Wiper operation at INT and LO positions is
controlled by the intermittent wiper circuit (incorporated in the integrated control unit). WINDSHIELD
WIPER/WASHER
SWITCH
Test, page 23-296
('94-'96) ('91-'93)
Replacement 23-294
('93-'96) ('91-'92)ProCarManuals.com

Washer Replacement

1. Disconnect the hose and the 2-P connectors from

the washer motor.

2. Remove the bumper, then remove the washer

reservoir by removing the three mounting bolts.

3. Remove the washer nozzles.

4. Install the washer nozzles, and take note of the fol-

lowing:

• Clip the hose to the front harness.

• Take care not to pinch hoses during reinstalla-

tion.

• Install the clips firmly.

• After installation, adjust the washer nozzles.
Windshield Washer Motor Test

1. Disconnect the 2-P connector from the washer

motor and remove the front bumper.

2. Test the washer motor operation by connecting

power to the terminal and ground to the

terminal.

WASHER FLUID

RESERVOIR

WINDSHIELD

WASHER

MOTOR

• If the motor fails to run smoothly, replace it.

• If the motor runs smoothly but little or no washer

fluid is pumped, check for a disconnected or

blocked washer hose, or a clogged pump outlet

in the motor.ProCarManuals.com