1997 ACURA NSX Service Repair Manual

Oil Pressur e
Testing
If th e oi l pressur e warnin g ligh t stay s o n wit h th e engin e
running , chec k th e engin e oi l level . I f th e oi l leve l i s
correct :
1 . Remov e th e engine oil pressur e switch , an d instal l
a n oi l pressur e gauge .
2 . Star t th e engine . Shu t i t of f immediatel y i f th e
gaug e register s n o oi l pressure . Repai r th e proble m
before continuing .
3. Allo w th e engin e t o reac h operatin g temperatur e
(fa n come s o n a t leas t twice) . Th e pressur e shoul d
be:
Engin e Oi l Pressure :
A t Idle : 7 0 kP a (0. 7 kgf/cm2,1 0 psi )
minimu m
A t 3,00 0 rpm : 34 0 kP a (3. 5 kgf/cm
2, 5 0 psi )
minimu m
• I f oi l pressur e i s withi n specifications , replac e th e
oi l pressur e sende r an d recheck .
• I f oi l pressur e i s NO T withi n specifications , inspec t
th e oi l pum p (se e pag e 8-8 ).
ENGIN E OI L PRESSUR ESWITCHMOUNTIN G HOL E
OIL PRESSUR E GAUG EADAPTO R(1/8"-28, BSPT )
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Oil Pum p
Overhau l
NOTE:
• Us e ne w O-ring s whe n reassembling .
• Appl y oi l t o O-ring s befor e installation .
6 x 1. 0 m m6 N- m (0. 6 kgf-m , 4 Ibf-ft ) PUM
P COVE R
Inspection , pag e 8-8 , 8-9PUM P HOUSIN GInspection , pag e 8-8 , 8-9
OI L SEA LInstallation , pag e 8- 9Replace .
OUTE R ROTO R
Inspection , pag e 8-8 , 8-9
INNE R ROTO RInspection , pag e 8-8 , 8-9
SEALIN G BOL T 1 8 m m49 N- m (5. 0 kgf-m , 3 6 Ibf-ft ) RELIE
F VALV E
Valve mus t slid e freel yin housin g bore .If valv e i s scored ,replace it .
O-RIN G
Replace .
SEALIN G BOL T 2 0 m m
3 9 N- m (4. 0 kgf-m , 2 9 Ibf-ft )
WASHE
R
Replace .
VALV E SPRIN G
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Oil Pum p
Removal/lnspection/lnstallatio n
1. Drai n th e engine oil.
2 . Remov e th e timin g bel t (se e pag e 6-15 ).
3 . Remov e th e dipstic k an d th e pipe .
4. Remov e th e oi l filte r assembly .
5. Remov e th e fron t exhaus t manifol d (M/ T se e pag e
6-24).
6 . Remov e th e oi l pan .
7 . Remov e th e oi l screen .
8 . Remov e th e baffl e plate .
9 . Remov e th e oi l pas s pip e an d th e joint .
10. Remov e th e mountin g bolt s an d th e oi l pum p
assembly . 11
. Remov e th e nin e screw s fro m th e pum p housing ,
the n separat e th e housin g an d cover .
12 . Chec k th e inner-to-oute r roto r radia l clearance .
Inner-to-Oute r Roto r Radia l Clearanc e
Standard (New) : 0.0 5-0.2 1 m m
(0.00 2-0.00 8 in )
Servic e Limit : 0.2 3 m m (0.00 9 in )
Replace .OIL PUM P
O-RING S
Replace .
OI L SCREE N
BAFFLE PLAT E
OI L PAS S PIP E
AND JOIN T
OUTE R ROTO R
13. Chec k th e housing-to-roto r axia l clearance .
Housing-to-Roto r Axia l Clearanc e
Standar d (New) : 0.0 2-0.0 7 m m
(0.00 1-0.00 3 in )
Servic e Limit : 0.1 2 m m (0.00 5 in )
OUTE R ROTO R
PUMP HOUSIN G
INNER ROTO R
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14. Chec k th e housing-to-oute r roto r radia l clearance .
Housing-to-Roto r Radia l Clearanc e
Standar d (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 RPUMP HOUSIN G
15. Inspec t bot h rotor s an d th e pum p housin g fo r scor -
in g o r othe r damage . Replac e th e oi l pum p assembl y
i f necessary .
16 . Remov e th e ol d oi l sea l fro m th e oi l pump .
17 . 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
18. Reassembl e th e oi l pump . Appl y liqui d thread-loc k
t o th e pum p housin g screws .
19 . Chec k tha t th e oi l pum p turn s freely .
20 . Appl y a ligh t coa t o f oi l t o th e sea l lip .
21 . Instal l th e tw o dowe l pin s an d ne w O-rin g o n th e
cylinde r block .
22 . Appl y liqui d gaske t t o th e cylinde r bloc k matin g sur -
fac e o f th e oi l pump .
NOTE:
• Us e liqui d gasket , Par t No . 0871 8-000 1 o r 0871 8
- 0003 .
• 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 cen -
tere 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 o f th e bol t holes .
PUMP HOUSIN GApply liqui dgaske t alon g th ebroke n line .
• D o 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 .
• Afte r assembly , wai t a t leas t 2 0 minute s befor e
filling th e engin e wit h oil .
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Oil Pum p
Removal/lnspection/lnstallatio n (cont'd )
23. Instal l th e oi l pum p o n th e cylinde r block .
24 . Instal l th e oi l pas s pip e an d joint .
25. Instal l th e baffl e plate .
26. Instal l th e oi l screen .
SPECIA L BOLT S8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
Replace .
SPECIAL BOLT S6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
Replace .
DOWEL PIN SOIL PAS SPIPE AN D JOIN T
OI L PUM P
Appl y liqui d gaske t t o
cylinde r bloc k matin g
surface .
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
OILSCREE N BAFFL
E
PLAT E6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft )
27. Appl y liqui d gaske t t o th e oi l pum p an d lef t sid e
cove r matin g area s a s show n below .
Apply liqui d gaske tto thes e points .
OIL PUM P
Apply liqui d gaske t
t o thes e points .
28. Instal l th e oi l pa n gaske t an d oi l pan .
NOTE : Us e a ne w oi l pa n gasket .
CYLINDE R
BLOC K
GASKE T
Replace .
OIL PA N
LEF T
SID E
COVE R
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29. Tighten bolts and nuts finger tight at six points as

shown below.

30. 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 kgf-m, 10 Ibf-ft)ProCarManuals.com

Oil Cooler , Oi l Filte r Bas e
Illustrate d Inde x
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 . 0871 8-000 1 o r 0871 8-0003 .OIL COOLE R CENTE R BOL T
4 9 N- m (5. 0 kgf-m , 3 6 Ibf-ft )
2 m m PI N
SPRIN G
O-RIN G
Replac e
RELIEF VALV EValve mus t slid e freel y i n bol t bore .If valv e i s scored , replac e it .
SPECIA L BOLT S
8 x 1.2 5 mm22 N- m (2. 2 kgf-m ,
1 6 Ibf-ft )
Replace .
OI L FILTE R BAS E ENGIN
E OI L COOLE R
O-RIN G
Replace .
OI L FILTE R
2 2 N- m (2. 2 kgf- m
1 6 Ibf-ft )
Replacement , 8- 5 ENGIN
E OI L
PRESSUR E SWITC H
1 8 N- m (1. 8 kgf-m , 1 3 Ibf-ft )
1/ 8 in . BSP T (Britis h Standar d
Pip e Taper ) 2 8 Threads/inch .
Use prope r liqui d gasket .
8 x 1.2 5 mm22 N- m (2. 2 kgf-m , 1 6 Ibf-ft )
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Special Tool s
9-4, 9-5 , 9-6 , 9-7
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