1991 ACURA NSX lock

Engine Lubricatio n
Illustrated Inde x
FRON T CYLINDE RHEADENGIN E OI L PRESSUR E GAUG ESENDIN G UNI T22 N- m (2. 2 kg-m . 1 6 Ib-ft )
NOTE :
• Us e ne w O-ring s whe n reassembling .
• Appl y oi l t o O-ring s befor e installation .
• Us e liqui d gasket , Par t No . 08718-0001 .
• I f th e botto m o f th e oi l pa n is deformed , i t shoul d b e
repaire d o r th e oi l pa n shoul d b e replace d t o retai n
prope r clearanc e betwee n th e scree n an d th e
bottom .
OIL CONTRO L ORIFIC ERemove wit h 6 m mbol t an d clean .
O-RIN GReplace .
8 x 1.2 5 mm22 N- m (2. 2 kg- m16 Ib-ft )Replace .
ENGINE OI LPRESSUR ESWITCH
OIL FILTE R BAS EIllustrate d Index ,page 8-1 2
OIL PUM PIllustrate d index , pag e 8- 7Inspection , pag e 8 -8Appl y liqui d gaske t t omatin g surfac e o f engin e block .
OIL PA N GASKE T
Replace .
OIL PA N• D o no t defor mthe bottom .Refer t o pag e 8-1 0whe n installing .
OIL FILTE ROne tur n o r22 N- m (2. 2 kg-m ,16 Ib-ft )Replacemen t 8- 5
6 x 1. 0 m m12 N- m(1.2 kg-m , 9 Ib-ft )
6 x 1. 0 m m12 N- m(1.2 kg-m , 9 Ib-ft )
DRAI N PLU G
20 x 1. 5 m m45 N- m (4. 5 kg-m , 3 3 Ib-ft )
6 x 1. 0 m m14 N- m (1. 4 kg-m , 1 0 Ib-ft )
ENGIN E OI LCOOLE R
WATE
R PAS S PIP E
DOWEL PIN S
SPECIA L BOLT S
8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft ) O-RING S
Replace . Replace .
OI L PAS S
PIPE
SPECIA L BOLT S6 x 1. 0 m m12 N- m(1.2 kg-m , 9 Ib-ft )
Replace .
6 x 1. 0 m m12 N- m (1. 2 kg-m , 9 Ib-ft )
DOWE
L PI N O-RING
S
Replace .
8 x 1.2 5 mm12 N- m (2. 2 kg-m ,16 Ib-ft )
OILSCREE N
WASHE R
Replace .
ProCarManuals.com

13. Chec k th e housing-to-oute r roto r radia l clearance .
Housing-to-Roto r Radia l Clearanc e
Standard (New) : 0.1 1 - 0.2 0 m m
(0.00 4 - 0.00 8 in )
Servic e Limit : 0.2 1 m m (0.00 8 in )
OUTE R ROTO R
PUMP HOUSIN G
14. Inspec t bot h rotors and th e pum p housin g fo r scorin g
o r othe r damage . Replac e th e oi l pum p assembl y i f
necessary .
1 5 . Remov e th e ol d oi l sea l fro m th e oi l pump .
16 . Gentl y ta p i n th e ne w oi l sea l unti l th e specia l too l
bottom s o n th e pump .
OIL SEA L DRIVE R07GAD-PH7020 1
OIL PUM P
17. Reassembl e th e oi l pump . Appl y liqui d thread-loc k
t o th e pum p housin g screws .
18 . Chec k tha t th e oi l pum p turn s freely .
19 . Appl y a ligh t coa t o f oi l t o th e sea l lip .
20 . Instal l th e tw o dowe l pin s an d ne w O-rin g o n th e
cylinde r block .
21 . Appl y liqui d gaske t t o th e cylinde r bloc k matin g
surfac e o f th e oi l pump .
NOTE:
• Use liqui d gasket , Par t No. 08718-0001 .
• Chec k tha t th e matin g surface s ar e clea n an d
dr y befor e applyin g liqui d gasket .
• Appl y liqui d gaske t evenly , i n a narro w bea d
centere d o n th e matin g surface .
• T o preven t leakag e o f oil , appl y liqui d gaske t t o
th e inne r thread s of the bol t holes .
PUMP HOUSIN G Appl
y liqui d
gaske t alon g th e
broke n line .
Do no t instal l th e part s i f fiv e minute s o r mor e
hav e elapse d sinc e applyin g liqui d gasket .
Instea d reappl y liqui d gaske t afte r removin g ol d
residue .
After assembly , wai t a t leas t 2 0 minute s befor e
fillin g th e engine with oil .
ProCarManuals.com

Oil Pump

Removal/lnspection/lnstallation

22. Install the oil pump on the cylinder block.

23. Install the oil pass pipe and joint.

24. Install the baffle plate.

25. Install the oil screen.

SPECIAL BOLTS

8 x
1.25
x 45 mm

22 N-m
(2.2 kg-m,

16 Ib-ft)

Replace.

DOWEL PINS

OIL PASS

PIPE AND JOINT

OIL PUMP

Apply liquid gasket to

cylinder block mating

surface.

6 x 1.0 mm

12 N-m
(1.2 kg-m,

9 Ib-ft)

OIL

SCREEN
BAFFLE

PLATE

6 x 1.0 mm

12 N-m
(1.2 kg-m,

9 Ib-ft)
26. Apply liquid gasket to the oil pump and left side

cover mating areas as shown below.

Apply liquid gasket

to these points.

OIL PUMP

Apply liquid gasket

to these points.

27. Install the oil pan gasket and oil pan.

NOTE: Use a new oil pan gasket.
CYLINDER

BLOCK

GASKET

Replace.

OIL PAN
LEFT

SIDE

COVER

SPECIAL BOLTS

6 x 1.0 mm

12 N-m (1.2 kg-m, 9 Ib-ft)

Replace.ProCarManuals.com

28. Tighten bolts and nuts finger tight at six points as

shown below.

29. Starting with nut torque all bolts and nuts, in a

clockwise pattern in three steps.

NOTE: Excessive tightening can cause distortion of

oil pan gasket and oil leakage.

Torque: 14 N-m (1.4 kg-m, 10 lb-ft)ProCarManuals.com

Exhaust Manifol d
Replacemen t
NOTE: Us e ne w gasket s an d self-lockin g nuts .
FRON T PRIMAR Y
HEATE D OXYGE N SENSO R
(HO2S)45 N- m (4. 5 kg-m , 3 3 Ib-ft )
• B e carefu l no t t o damage .
• Us e th e specia l too l whe nremovin g an d installing .
8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft )
REAR PRIMAR YHO2S45 N- m (4. 5 kg-m ,33 Ib-ft )
• B e carefu l no t t o damage .
• Us e th e specia l too l whe n
removin g an d installing .
6 x 1 0 m m12 N- m (1. 2 kg-m ,9 Ib-ft )
SELF-LOCKIN GNUT8 x 1.2 5 mm34 N- m (3. 4 kg-m ,25 Ib-ft )
Appl y oi l t o th e
nu t threads .
Replace.
FRONT EXHAUS T MANIFOL D
8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft )
EXHAUS T MANIFOL DCOVER
EXHAUS TMANIFOL DCOVERS
8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft )
GASKE TReplace .
REAR EXHAUS T MANIFOL D
SELF-LOCKIN G NUT S
8 x 1.2 5 mm34 N- m (3. 4 kg-m ,25 Ib-ft )
Appl y oi l t o th e
nu t threads .
Replace.
6 x 1. 0 m m12 N- m (1. 2 kg-m ,9 Ib-ft )
GASKE TReplace .
ProCarManuals.com

Exhaust Pip e an d Muffle r
Replacemen t
NOTE: Us e ne w gasket s an d self-lockin g nut s whe n reassembling .
GASKETSReplace.
JOINT PIP E
REA R SECONDAR YHO2S
4 5 N- m (4. 5 kg-m , 3 3 Ib-ft )
• B e carefu l no t t o
damage .
• Us e th e specia l too l
fo r remova l an d
installation . SELF-LOCKIN
G NUT S
10 x 1.2 5 mm34 N- m (3. 4 kg-m , 2 5 Ib-ft )Replace .
MUFFLE R
SELF-LOCKIN G NU T8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft )Replace .Tighten th e flang e nut s
i n steps , alternatin g
side-to-side .
THRE E WA Y CATALYTI C
CONVERTER S (TWCs )
Inspect a s show nbelow.
GASKET SReplace.
FRONT EXHAUST -
PIP E A FRON
T SECONDAR Y
HO2 S
4 5 N- m (4. 5 kg-m , 3 3 Ib-ft )
• B e carefu l no t t o
damage .
• Us e th e specia l too l
fo r remova l an d
installation .
JOINTPIPE
SELF-LOCKIN G NUT S10 x 1.2 5 mm55 N- m (5. 5 kg-m , 4 0 Ib-ft )
Replace . SELF-LOCKIN
G NUT S
8 x 1.2 5 mm22 N- m (2. 2 kg-m , 1 6 Ib-ft )Replace .Tighten th e flang e nut s i n steps ,
alternatin g side-to-side .
GASKETSReplace.
SELF-LOCKIN G NU T8 x 1.2 5 mm22 N- m (2. 2 kg-m , 1 6 Ib-ft )Replace .Tighten th e flang e nut s i n steps ,
alternatin g side-to-side .
6 x 1. 0 m m10 N- m (1. 0 kg-m , 7 Ib-ft )
TWC Inspection :
Using a flashlight , mak e a visua l chec k fo r plugging , meltin g
or crackin g o f th e catalyst .
TWC
FLASHLIGH T
REA
R EXHAUS T
PIP E A
GASKE TReplace .
GASKETReplace .
ProCarManuals.com

Inspection


Replacement
1. Remove the timing belt (see page 6-15) ('91-'93) or

('94-'96).

2. Check that the water pump pulley turns counterclock-

wise.

3. Check for signs of seal leakage.
NOTE: A small amount of "weeping" from the bleed
hole is normal.

Turns
counterclockwise

BLEED HOLE
BLEED HOLE

1. Remove the timing belt (see page 6-15 ('91-'93) or
('94-'96).

2. Unscrew the bolts, then remove the water pump.
NOTE: Inspect and clean the 0-ring groove and
mating surface with the cylinder block.

DOWEL PIN
SPECIAL BOLTS
6 x 1.0 mm: 7 BOLTS
12 N·m

(1 .2 kg-m, 9 Ib-ft)

Replace,

WATER PUMP
0-RING

Replace.
SPECIAL BOLTS
8 x 1.25 mm: 2 BOLTS

22 N·m
(2.2 kg-m,
16 Ib-ft)
Replace.

3. Install the water pump in the reverse order of
removal.

NOTE:
Keep the 0-ring in position when installing.
Clean up spilled engine coolant.ProCarManuals.com

II. Engine Control Module (ECM) Reset Procedure

Either of the following actions, will reset the ECM.

• Using the OBD-II scan tool or Honda PGM Tester to clear the ECM's memory.

NOTE: See the OBD-II scan tool or Honda PGM Tester user's manuals for specific operating instructions.

• Turn the ignition switch OFF. Remove the CLOCK (7.5 A) fuse from the under-hood fuse/relay box for 10 seconds.

UNDER-HOOD

FUSE/RELAY BOX
CLOCK

(7.5 A) FUSE

III. Final Procedure (this procedure must be done after any troubleshooting)

1. Remove the SCS Service Connector if it is connected.

NOTE: If the SCS service connector is connected and there are no DTCs stored in the ECM, the MIL will stay on

when the ignition switch is turned on.

2. Do the ECM Reset Procedure.

3. Turn the ignition switch OFF.

4. Disconnect the OBD-II scan tool or Honda PGM Tester from the Data Link Connector,ProCarManuals.com