ACURA NSX 1997 Service Repair Manual

9. Instal l th e CKP/CY P senso r o n th e fron t cylinde r
head .
CKP/CY P SENSO R
6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
10. Instal l th e fron t an d rea r bac k covers .
RUBBE R SEAL S
REA R BAC K COVE R
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,
8. 7 Ibf-ft ) RUBBE
R SEAL S
FRON T BAC K COVE R
RUBBE R SEA L
11. Inser t th e dowe l pin s i n th e camshaf t pulley .
12 . Instal l th e camshaf t pulleys , the n tighte n th e retain -
in g bolt s t o th e torqu e specified .
CAMSHAF T PULLEY S
RETAININ G BOLT S
10 x 1.25 mm69 N- m (7. 0 kgf-m , 5 1 Ibf-ft )
13. Instal l th e timin g bel t (se e pag e 6-18 ).
14 . Adjus t th e valv e clearanc e (se e pag e 6-9 ).
15 . Inspec t th e rocke r arm s (se e page s 6-7 , 6-8 ).
16 . Instal l th e hea d cove r gaske t i n th e groov e o f th e
cylinde r hea d cover . Sea t th e recesse s fo r th e
camshaf t first , the n wor k i t int o th e groov e aroun d
th e outsid e edges .
NOTE:
• Befor e installin g th e hea d cove r gasket , thor -
oughl y clea n th e sea l an d th e groove .
• Whe n installing , mak e sur e th e hea d cove r gaske t
i s seate d securel y i n th e corner s o f th e recesse s
with n o gap .
HEA D COVE RGASKE TClean.
RUBBE RSEAL
CORNER S O F
TH E RECESSE S
CYLINDER HEA DCOVE R
CORNER S O F
TH E RECESSE S
(cont'd)
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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

7-6
7-1 8
7-1 8
Specia l Tool s
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Engine Bloc k
Illustrate d Inde x
Lubricat e al l interna l part s wit h engin e oi l durin g reassembly .
NOTE:
• Appl y liqui d gaske t t o th e matin g surface s o f th e lef t
side cove r an d oi l pum p cas e befor e installin g them .
• Us e liqui d gasket , par t No . 0871 8-000 1 o r 0871 8-
0003 .
• I f th e botto m of th e oi l pa n is deformed , i t shoul d
be repaire d o r th e oi l pa n shoul d b e replace d re -
tain prope r clearanc e betwee n th e scree n an d
the bottom .
COVER
DRIV E PLAT E (A/T )
Check fo r cracks .
SPECIA L WASHER
12 x 1. 0 m m74 N- m (7. 5 kgf-m , 5 4 Ibf-ft )
Torqu e sequence , pag e 7- 6
12 x 1. 0 m m103 N- m (10. 5 kgf-m , 7 6 Ibf-ft )
Torqu e sequence , pag e 7- 6
6 x 1. 0 m m14 N- m (1. 4 kgf-m , 1 0 Ibf-ft )
OIL PA N• D o no t defor mthe bottom .• Refe r t o pag e 8-1 0whe n installing .
OIL PA N GASKE T
Replac e
6 x 1. 0 m m12 N- m (1. 2 kgf-m , 8. 7 Ibf-ft )
O-RIN G
Replace .
CRANKSHAF T
OI L SEA L
Installation , pag e 8- 9Replace .
CRANKSHAF T OI L SEA L
Installation , pag e 7-1 8Replace .
SPECIAL BOL T6 x 1. 0 m m12 N- m (1. 2 kgf-m ,8.7 Ibf-ft )Replace .
OIL PAS SPIPE/JOIN T
LEFTSIDE COVE RApply liqui d gaske tto matin g surface .
DOWEL PIN S
OIL PUM POverhaul , pag e 8- 7
Removal/Inspection ,
pag e 8- 8
Appl y liqui d gaske tto matin g surface . SPECIA
L BOLT S
8 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 .
FLYWHEE L (M/T )Runout , sectio n 1 2
COVE R
OIL SCREE N
O-RING S
Replace .BAFFL
E PLAT E
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Engine Bloc k
Illustrate d Inde x (cont'd )
Lubricate al l interna l part s wit h engin e oi l durin g reassembly .
MAIN BEARIN GCAP BRIDG E
MAI N BEARIN G
CAP
CRANKSHAF TEnd play , pag e 7- 6
Runout , Taper , an d
Out-of-Round , pag e 7-1 1
Installation , pag e 7-1 9
THRUS T WASHER S
Replacement , pag e 7- 6
Groove d side s fac e outward .
NOTE : Thrus t washe r thicknes s
is fixe d an d mus t no t b e change dby grindin g o r shimming .
10 x 1.2 5 mm49 N- m (5. 0 kgf-m , 3 6 Ibf-ft )Apply engin e oi l t o th e
bol t thread s an d th e washers .
11 x 1. 5 m m65 N- m(6.6 kgf-m , 4 8 Ibf-ft )Apply engin e oi l t o th e bol tthread s an d th e washers .
NOTE : Afte r torquin g
eac h cap , tur n crankshaf t
t o chec k fo r binding .
9 x 1.2 5 mm39 N- m (4. 0 kgf-m , 2 9 Ibf-ft )Apply engin e oi l t o th e
bol t threads .
DOWE L PI N
MAI N BEARING S
Radia l clearance , pag e 7- 7
Selection , pag e 7- 8
NOTE : Ne w mai n bearing s
must b e selecte d b y matchin gcrank an d bloc k identificatio n
markings .
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,8.7 Ibf-ft )
DOWE L PI N
OI
L BREATHIN G
COVER
O-RIN GReplace .
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NOTE: Ne w ro d bearing s mus t b e selecte d b y matchin g
connectin g ro d assembl y an d crankshaf t identificatio n
markings (se e pag e 7-8 ).
TIMIN GBELTSIDE
CAUTION :
• Th e pisto n skir t i s coate d wit h molybdenum ;
handle th e pisto n carefull y t o preven t an y
damage .
• Th e connectin g rod s ar e mad e o f titanium . At -
temptin g t o remov e th e pisto n pi n wit h conven -
tional sho p equipmen t wil l damag e th e connec -
ting rod .
• I f th e piston , connectin g rod , o r pisto n pi n re -
quir e replacement , al l thre e mus t b e replace d a s
an assembly .
PISTONInspection , pag e 7-1 2NOTE :• Befor e removin g piston , inspec t th e to p
o f th e cylinde r bor e fo r carbo n build-u p
o r ridge . Remov e ridg e i f necessary , pag e 7-9 .
• T o maintai n prope r pisto n clearance , matc h
th e lette r o n th e pisto n to p (N o lette r denote s A. )
with th e lette r fo r eac h cylinde r stampe d o n th eblock .
CONNECTIN G RO D ASSEMBL Y
End play , pag e 7- 6Selection , pag e 7-1 4
CONNECTIN G RO D
BEARING SClearance , pag e 7- 7
Selection , pag e 7- 8 PISTO
N RING S
Replacement , pag e 7-1 5
Measurement , page s 7-1 5 an d 7-1 6
Alignment , pag e 7-1 6
CONNECTIN G RO D
WASHE R
CONNECTIN G RO D CA P NU T8 x 0.7 5 m m20 N- m (2. 0 kgf-m , 1 4 Ibf-ft )then tur n 116 °Appl y engin e oi l t o th e
nu t threads .
Afte r torquin g eac h bearin g
cap , rotat e crankshaf t t o
chec k fo r binding . CYLINDE
R BOR E SIZE S
NOTE : T o maintai n prope r pisto n clearance ,
matc h thes e letter s wit h th e letter s o n th e
pistons . Th e letter s o n th e bloc k rea d fro mleft t o right , No . 1 throug h No . 3 . cylinder s
o n th e firs t lin e an d No . 4 throug h No . 6
cylinder s o n th e secon d line .
CONNECTIN G RO D BEARIN G CA P
Installation , pag e 7-1 9
NOTE : Instal l cap s s o th e bearin g reces s is
o n th e sam e sid e a s th e reces s in th e rod . Inspec
t to p o f eac h cylinde r bor e
fo r carbo n build-u p o r ridg e
befor e removin g piston .
Remov e ridg e if necessary , pag e 7- 9
ENGIN E BLOC KCylinde r bor e inspection , pag e 7-12
Warpag e inspection , pag e 7-12
Cylinde r bor e honing , pag e 7-13
CONNECTIN
G RO D BOL T
FRON
T
REAR
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Flywheel an d Driv e Plat e
Replacemen t
Connecting Rod s an d
Crankshaf t
Manual Transmission :
Remove th e eigh t flywhee l bolts , the n separat e th e
flywhee l fro m th e crankshaf t flange . Afte r installation ,
tighten th e bolt s i n th e sequenc e shown .
RING GEA R HOLDE R07LAB-PV0010 0 or07924-PD2000 3
RING GEA R HOLDE R07LAB-PV00100 or07924-PD2000 3
ENGINEBLOCK
RING GEA RInspec t rin g gea rteeth fo r wea r an ddamage .
12 x 1. 0 m m103 N- m(10. 5 kgf-m , 7 6 Ibf-ft )
Automati c Transmission :
Remov e th e eigh t driv e plat e bolts , the n separat e th e
driv e plat e fro m th e crankshaf t flange . Afte r installa -
tion, tighte n th e bolt s i n th e sequenc e shown .
12 x 1. 0 m m74 N- m(7.5 kgf-m , 5 4 Ibf-ft )
End Pla y
Connectin g Ro d En d Play :
Standard (New): 0.15-0.30 mm
(0.006-0.01 2 in )
Servic e Limit : 0.40 m m (0.01 6 in )
CONNECTIN G RO D CRANKSHAF T
• I f out-of-tolerance , instal l a ne w connectin g rod .
• I f stil l out-of-tolerance , replac e th e crankshaf t
(se e page s 7-9 , 7-1 0 an d 7-1 9 to 7-22 ).
Pus h th e crankshaf t firml y awa y fro m th e dia l indicator ,
an d zer o th e dia l agains t th e en d o f th e crankshaft . The n
pul l th e crankshaf t firml y bac k towar d th e indicator ; dia l
readin g shoul d no t excee d servic e limit .
SCREWDRIVE R
Crankshaft En d Play :
Standar d (New) : 0.1 0 — 0.3 5 m m
(0.004-0.01 4 in)
Servic e Limit : 0.4 5 m m (0.01 8 in )
• I f en d pla y i s excessive , inspec t th e thrus t
washer s an d thrus t surfac e o n th e crankshaft .
Replace part s a s necessary .
NOTE : Thrus t washe r thicknes s i s fixe d an d mus t
no t b e change d eithe r b y grindin g o r shimming .
Thrus t washer s ar e installe d wit h groove d sid e fac -
ing outward .
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Main Bearing s
Clearanc e
1. T o chec k mai n bearing-to-journa l oi l clearance ,
remov e th e mai n cap s an d bearin g halves .
2 . Clea n eac h mai n journa l an d bearin g hal f wit h a
clea n sho p towel .
3 . Plac e on e stri p o f plastigag e acros s eac h mai n jour -
nal.
NOTE : I f th e engin e i s stil l i n th e ca r whe n yo u bol t
th e mai n ca p dow n t o chec k clearance , th e weigh t
o f th e crankshaf t an d flywhee l wil l flatte n th e plasti -
gag e furthe r tha n jus t th e torqu e o n th e ca p bolts ,
an d giv e yo u a n incorrec t reading . Fo r a n accurat e
reading , suppor t th e cran k wit h a jac k unde r th e
counterweights , an d chec k onl y on e bearin g a t a
time .
4. Reinstal l th e bearings , cap s an d ca p bridge , the n
torqu e th e 9 m m bridg e bolt s t o 3 9 N- m (4. 0 kgf-m ,
2 9 Ibf-ft) . Torqu e th e 1 1 m m ca p bolt s t o 6 5 N- m
(6. 6 kgf-m , 4 8 Ibf-ft) .
5 . Torqu e th e sid e bolt s t o 4 9 N- m (5. 0 kgf-m , 3 6 Ibf-ft) .
6 . Remov e th e bridge , cap s an d bearings , an d
measur e th e wides t par t o f th e plastigage .
Mai n Bearing-to-journa l Oi l Clearance :
Standar d (New) : 0.024—0.04 8 m m
(0.0009-0.0019 in)
Servic e Limit : 0.05 0 m m (0.002 0 in )
PLASTIGAG E STRI P
7. I f th e plastigag e measure s to o wid e o r to o narrow ,
(remov e th e engin e if it' s stil l i n th e car) , remov e th e
crankshaft , an d remov e th e uppe r hal f o f th e bear -
ing . Instal l a new , complet e bearin g wit h th e sam e
colo r cod e (selec t th e colo r a s show n o n nex t page) ,
and rechec k th e clearance .
CAUTION: D o no t file , shim , o r scrap e the bear -
ing s o r th e cap s t o adjus t clearance .
8 . I f th e plastigag e show s th e clearanc e i s stil l incor -
rect , tr y th e nex t large r o r smalle r bearin g (th e colo r
liste d abov e o r belo w tha t one) , an d chec k again .
NOTE : I f th e prope r clearanc e canno t b e obtaine d
b y usin g th e appropriat e large r o r smalle r bearings ,
replac e th e crankshaf t an d star t over .
Connectin g
Rod Bearing s
Clearanc e
1. Remov e th e connectin g ro d ca p an d bearin g half .
2 . Clea n th e crankshaf t ro d journa l an d bearin g hal f
wit h a clea n sho p towel .
3 . Plac e plastigag e acros s th e ro d journal .
4 . Reinstal l th e bearin g hal f an d cap , an d torqu e th e
nut s a s show n o n pag e 7-20 .
NOTE : D o no t rotat e th e crankshaf t durin g inspection .
5 . Remov e th e ro d ca p an d bearin g hal f an d measur e
th e wides t par t o f th e plastigage . Mak e sur e th e
clearanc e betwee n th e connectin g ro d an d th e
bearin g i s withi n th e standar d show n below .
Connectin g Ro d Bearing-to-Journa l Oi l Clearance :
Standar d (New) : 0.04 0 - 0.06 4 m m
(0.0016-0.002 5 in )
Servic e Limit : 0.06 4 m m (0.002 5 in )
PLASTIGAG E STRI P
6. I f th e plastigag e measure s to o wid e o r to o narrow ,
remov e th e uppe r hal f o f th e bearing , instal l a new ,
complet e bearin g wit h th e sam e colo r cod e (selec t
colo r a s show n o n nex t page) , an d rechec k th e
clearance .
CAUTION : D o no t file , shim , o r scrap e th e bearin g
o r th e cap s t o adjus t clearance .
7 . I f th e plastigag e show s th e clearanc e i s stil l incor -
rect , tr y th e nex t large r o r smalle r bearin g (th e colo r
liste d abov e o r belo w tha t one) , an d chec k
clearanc e again .
NOTE : I f th e prope r clearanc e canno t b e obtaine d
b y usin g th e appropriat e large r o r smalle r bearings ,
replac e th e crankshaf t an d star t over .
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Main Bearing s
Selection
CAUTION : I f th e code s ar e indecipherabl e becaus e o f
an accumulatio n o f dir t an d dust , d o no t scru b the m
with a wir e brus h o r scraper . Clea n the m onl y wit h sol -
ven t o r detergent .
Crankshaf t Bor e Cod e Location s
Letter s o r bar s hav e bee n stampe d o n th e en d o f th e
bloc k a s a cod e fo r th e siz e o f eac h o f th e fou r mai n jour -
nal bores . Us e them , an d th e number s stampe d o n th e
crankshaf t (code s fo r mai n journa l size) , t o choos e th e
correc t bearings .
No. 4 JOURNA L(FLYWHEE L END )
Main Journa l Cod e Location s(numbers o r bars )
No. 4 JOURNA L(FLYWHEE L END )
No. 1 JOURNA L(PULLEY END )
No. 1 JOURNA L(PULLEY END )
Bearin g Desig n
COLOR
GROOV E
UPPER BEARIN G
COLOR
LOWE R BEARIN G
Bearing Identificatio n
Color cod e i s o n th e
edg e o f th e bearin g
Smallermainjourna l
Smalle rbearing(thicker )
NOTE: Whe n usin g bearin g halve s o f differen t col -
ors , i t doe s no t matte r whic h colo r i s use d i n th e
top o r bottom .
Connectin g Ro d Bearing s
Selection
CAUTION : I f th e code s ar e indecipherabl e becaus e o f
an accumulatio n o f dir t an d dust , d o no t scru b the m
with a wir e brus h o r scraper . Clea n the m onl y wit h sol -
ven t o r detergent .
Connectin g Ro d Journa l Cod e Locatio n
Number s hav e bee n stampe d o n th e sid e o f eac h con -
nectin g ro d a s a cod e fo r th e siz e o f th e bi g end . Us e
them , an d th e letter s stampe d o n th e crankshaf t (code s
for ro d journa l size) , t o choos e th e correc t bearings .
Half o f numbe r i sstampe d o n bearin gcap an d th e othe rhalf i s stampe d o nrod .
Rod Journa l Cod e Location s (letter s o r bars )
No. 1 JOURNA L(PULLEY END )
Bearin g Identificatio n
Color cod e i s o n th eedg e o f th e bearin g
No. 6 JOURNA L(FLYWHEE L END )
Smalle rrodjourna l
Smalle rbearing(thicker )
NOTE: Whe n usin g bearin g halve s o f differen t col -
ors, i t doe s no t matte r whic h colo r i s use d i n th e
top o r bottom .
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Piston/Connecting Ro d Assemblie s an d Crankshaf t
Removal
1. Remov e th e lef t sid e cover .
LEFT SID E COVE R
2. Remov e th e oi l screen .
BAFFLE PLAT E
OIL SCREE N
O-RING S
Replace
OIL PUM P
3. Remov e th e baffl e plate .
4 . Remov e th e oi l pas s pip e an d joint .
5. Remov e th e oi l pump .
6. I f yo u ca n fee l a ridg e o f meta l o r har d carbo n
around th e to p of an y cylinder , remov e i t wit h a
ridg e reamer . Follo w reame r manufacturer' s
instructions.
CAUTION: I f th e ridg e i s no t removed , i t ma y
damag e th e piston s a s the y ar e pushe d out .
RIDG E REAME R
7. Remov e th e bearin g ca p bridge .
BEARIN G CA PBRIDG E
OIL PAS SPIPE
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