1997 ACURA NSX light

Valves, Valv e Spring s
an d Valv e Seal s
Replacemen t
NOTE: Identif y valve s an d valv e spring s a s the y ar e
remove d s o tha t eac h ite m ca n b e reinstalle d i n it s origi -
nal position .
1. Usin g a n appropriate-size d socke t an d plasti c mallet ,
lightl y ta p th e valv e retaine r t o loose n th e valv e keep -
er s befor e installin g th e valv e sprin g compressor .
PLASTIC MALLE T
SOCKET
2. Instal l th e sprin g compressor . Compres s th e sprin g
an d remov e valv e keeper .
VALVE SPRIN GCOMPRESSO RATTACHMENTEXTENSION
07MA F - PR9010 A VALV
E SPRIN G
COMPRESSO RATTACHMENT07757 - PJ1010 A
VALV E SPRIN G COMPRESSO R
(Commercially available )Snap-on CF71 1 o r equivalen t
(cont'd)
ProCarManuals.com

Valve Installation

NOTE: Tap the valve stem only along its axis so you do

not bend the stem.

• When installing valves in the cylinder head, coat valve

stems with oil before inserting into valve guides, and

make sure all valves move up and down smoothly.

• When valves and springs are in place, lightly tap the

end of each valve stem two or three times to ensure

proper seating of valve and valve keepers (use ham-

mer handle bottom).

VALVE STEMS

HAMMER HANDLE

BOTTOMProCarManuals.com

Camshafts

Installation

CAUTION: Valve locknuts should be loosened and ad-

justing screws backed off before installation.

1. After wiping down the camshaft and journals in the

cylinder head, lubricate both surfaces and install the

camshafts and rubber caps.

NOTE: Apply liquid gasket around the rubber cap.

2. Turn the camshaft until its keyway is facing up. (No. 1

cylinder
TDC).

3. Set a new O-ring and a dowel pin in the oil passage

of the No. 1 camshaft holder.

4. Install the camshaft seals with the open side

(spring) facing in.

Lubricate cam lobes after reassembly.

O-RING

(Replace)

and

DOWEL PIN
Keyways

facing up.

CAMSHAFT SEAL

Seal housing surface should be dry.

Apply a light coat of oil to camshaft

and inner lip of seal.
RUBBER CAPS

Replace for oil

leakage.ProCarManuals.com

Camshafts

Installation (cont'd)

17. Apply liquid gasket to the head cover gasket at the

eight corners of the recesses.

NOTE:

• Use liquid gasket, Part No. 08718 - 0001 or 08718

- 0003.

• Check that the mating surfaces are clean and dry

before applying liquid gasket.

• Do not install the parts if five minutes or more

have elapsed since applying liquid gasket. Instead,

reapply liquid gasket after removing old residue.

• After assembly, wait at least 20 minutes before

filling the engine with oil.

Apply liquid gasket to

the shaded areas.

18. When installing the cylinder head cover, hold the

head cover gasket in the groove by placing your fin-

gers on the camshaft contacting surfaces (top of the

semicircles).

Once the cylinder head cover is on the camshaft

holder, slide the cover slightly back and forth to

seat the head cover gasket.

NOTE:

• Before installing the cylinder head cover, clean

the cylinder head contacting surfaces with a

shop towel.

• Do not touch the parts where liquid gasket was

applied.

• Replace the washer when damaged or deterio-

rated.

CYLINDER

HEAD COVER
WASHER

6 x 1.0 mm

12 N-m (1.2 kgf-m,

8.7 Ibf-ft)
19. Tighten the nuts in two or three steps. In the final step,

tighten all nuts, in sequence, to 12 N-m (1.2 kgf-m,

8.7 Ibf-ft).

NOTE: After assembly, wait at least 20 minutes

before filling the engine with oil.

20. After installation, check that all tubes, hoses and

connectors are installed correctly.

NOTE: After installation, fill the engine with oil up to

the specified level, run the engine for more than three

minutes, then check for oil leakage.ProCarManuals.com

A/T:
GASKET SReplace.
REAR SECONDAR Y
HO2 S
4 4 N- m (4. 5 kgf-m , 3 3 Ibf-ft )
• B e carefu l no t t o
damage .
• Us e th e specia l too lfor remova l an dinstallation .
SELF-LOCKIN G NUT S10 x 1.2 5 m m33 N- m (3. 4 kgf-m , 2 5 Ibf-ft )Replace .
JOINT PIP E
LON G BOL T
FRON T EXHAUS T
PIP E A MUFFLE
R
SELF-LOCKIN G NU T
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
Replace .Tighten th e flang e nut sin steps , alternatin gside-to-side .
THREE WA Y CATALYTI C
CONVERTER S (TWCs )
Inspect a s show nbelow .
GASKET S
Replace . FRON
T SECONDAR Y
HO2 S
4 4 N- m (4. 5 kgf-m , 3 3 Ibf-ft )
• B e carefu l no t t o
damage .
• Us e th e specia l too lfor remova l an dinstallation .
JOINTPIPE
GASKE T
Replace .
LON G BOL T
GASKE T
Replace .
SELF-LOCKIN G NU T
8 x 1.2 5 m m22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )Replace .Tighten th e flang e nut s i n steps ,alternatin g side-to-side .
SHORT BOL T
6 x 1. 0 m m9.8 N- m (1. 0 kgf-m , 7. 2 Ibf-ft )
SELF-LOCKIN G NUT S8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
Replace .
Tighten th e flang e nut s i n steps ,alternatin g side-to-side .
SELF-LOCKIN G NUT S
5 4 N- m (5. 5 kgf-m , 4 0 Ibf-ft )
Replace .
TWC Inspection :
Usin g a flashlight , mak e a visua l chec k fo r plugging , meltin g
o r crackin g o f th e catalyst .
TWC
FLASHLIGH T
GASKE
T
Replace .
REA
R EXHAUS T
PIP E AGASKE
T
Replace .
LON
G
BOL T
ProCarManuals.com

System Descriptio n
Electrical Connection s
In th e under-hoo d fuse/rela y bo x
I n th e engin e compartmen t fuse/rela y bo x
I n th e under-das h fus e bo x
FUSE SBRAK E LIGHT S HOR N (2 0 A) *
TH L MOTO R (2 0 A)* *
CLOC K (7. 5 A) *
AC G (12 0 A)* *ACG(S ) (2 0 A)* *IG COI L (3 0 A)* *
No . 2 FUE L PUM P SRS 2 (1 5 A)** *
No. 5 BACK-U P LIGHT SALTERNATO RTURN SIGNAL S (1 5 A)** »No. 7 STARTE R SIGNA L (7. 5 A)** *
ProCarManuals.com

CAUTION:

Puncturing the insulation on a wire can cause poor or intermittent electrical connections.

Bring the tester probe into contact with the terminal from the connector side of wire harness connectors in the engine

compartment. For female connectors, just touch lightly with the tester probe and do not insert the probe.

RUBBER SEAL

WIRE HARNESS

TERMINAL
TESTER PROBEProCarManuals.com

Troubleshooting

Engine Control Module Terminal Arrangement (cont'd)

ECM CONNECTOR F (26P)
Wire side of female terminals

NOTE: Standard battery voltage is 12 V.

*: M/T

Terminal

number

1

2

3

4

6

7

8

9

10

10*

11

12

13

14

15

16

17

18

19

20

21

22

24
Wire

color

YEL/WHT

GRN/WHT

BRN

RED

GRY

LT

GRN/BLK

LT

GRN/RED

LTGRN

BLU/ORN

BLU/ORN

BLU/BLK

YEL/RED

BLU/RED

YEL/WHT

GRN/WHT

GRN/WHT

RED/WHT

BLU

BLU/YEL

GRN/YEL

LT GRN/YEL

WHT/YEL

RED/BLU
Terminal name

VCC1

(SENSOR VOLTAGE)

SG1 (SENSOR GROUND)

IMO CODE (IMMOBILIZER

CODE)

FLR2 (FUEL PUMP RELAY 2)

BKSW2 (BRAKE SWITCH 2)

CCRESSW (CRUISE

CONTROL RESUME SWITCH)

CC SETSW (CRUISE

CONTROL SET SWITCH)

CC MSW (CRUISE

CONTROL MAIN SWITCH)

CC ATSSW (CRUISE

CONTROL A/T GEAR

POSITION SWITCH)

CC CLSW (CRUISE

CONTROL CLUTCH SWITCH)

CCIL (CRUISE CONTROL INDI-

CATOR LIGHT)

AP2 (ACCELERATOR

POSITION SENSOR CIRCUIT 2)

AP1 (ACCELERATOR

POSITION SENSOR CIRCUIT 1)

VCC3 (SENSOR VOLTAGE)

SG3 (SENSOR GROUND)

BKSW1 (BRAKE SWITCH 1)

MTSL (REVERSE LOCKOUT

RELAY OUT)

VREF (REFERENCE VOLTAGE)

VT SOLF (FRONT VTEC

SOLENOID VALVE)

VT SOLR (REAR VTEC

SOLENOID VALVE)

ATSDL B (A/T Fl DATA LINE B)

ATSDL (A/T Fl. DATA LINE A)

TCSSDL (TCS DATA LINE)
Description

Provides sensor voltage

Sensor ground

Detects immobilizer signal

Drives fuel pump relay

Detects brake switch 2 signal

Detects resume switch signal

Detects set switch signal

Power source for the cruise

control system

Detects A/T gear position switch

signal

Detects clutch switch signal

Drives cruise control indicator

light

Detects accelerator position

sensor circuit 2 signal

Detects accelerator position

sensor circuit 1 signal

Provides sensor voltage

Sensor ground

Detects brake switch 1 signal

Drives reverse lockout relay

Provides reference voltage to

TCM

Drives front VTEC solenoid

valve

Drives rear VTEC solenoid valve

Detects data from the TCM

Sends data to the TCM

Interface for TCS control unit
Signal

With ignition switch ON (II): about 5 V

With ignition switch OFF: 0 V

With engine at low rpm: battery voltage

With engine at high rpm: 0 V

With brake pedal released and cruise

control main switch ON: battery voltage

With brake pedal depressed: 0 V

With resume switch released: 0 V

With resume switch depressed: battery

voltage

With set switch released: 0 V

With set switch depressed: battery

voltage

With cruise control main switch ON:

battery voltage

With cruise control main switch OFF: 0 V

In , or position: 0 V

In any other position: approx. 8 V

With clutch pedal released: approx. 8 V

With clutch pedal depressed: 0 V

With cruise control ON: 0 V

With cruise control OFF: battery voltage

With accelerator fully open: about 4.5 V

With accelerator fully closed: about 0.5 V

With accelerator fully open: about 4.5 V

With accelerator fully closed: about 0.5 V

With ignition switch ON (II): about 5 V

With ignition switch OFF: 0 V

With brake pedal released: 0 V

With brake pedal depressed: battery

voltage

With vehicle speed above 13 mph

(20 km/h): 0 V

With vehicle speed below 9 mph

(15 km/h): battery voltage

With ignition switch ON (II): about 5 V

With ignition switch OFF: 0 V

With engine at low rpm: 0 V

With engine at high rpm: battery voltage

With engine at low rpm: 0 V

With engine at high rpm: battery voltage

With engine running: pulses

With engine running: pulses

With engine running: pulsesProCarManuals.com