1997 ACURA NSX Service Repair Manual

VTEC
Rocke r Arm s — Inspectio n Usin g Specia l Tool s (cont'd )
2. Remov e th e 1 0 m m sealin g bol t an d washe r fro m
th e inspectio n hol e an d connec t th e tools .
VTEC PLU G07MAJ-PR7020 A
REGULATOR VALV E
(Commerciall y
available )
• Pul l th e leve r an dturn to adjust .
INSPECTIO N HOL E
ADAPTE R
l0 x 1.0 m m(Commerciall y
available ) WASHE
R
Replace .
3. Appl y th e specifie d ai r pressur e t o th e rocke r ar m
piston s afte r loosenin g th e regulato r valv e o n th e
VTE C inspectio n attachment . 4
. Mak e sur e tha t th e primar y an d secondar y rocke r
arm s ar e mechanicall y connecte d b y piston s an d tha t
th e mi d rocke r arm s d o no t mov e whe n pushe d
manually .
PRIMARY
ROCKE R ARM
LOS T MOTIO N
ASSEMBL Y SECONDAR
Y
ROCKE R AR M
MI D ROCKE R
ARM
• I f a mi d rocke r ar m move s independentl y o f th e
primar y an d secondar y rocke r arms , replac e th e
rocke r arm s a s a set .
5 . Remov e th e tools .
6 . Chec k th e operatio n of the los t motio n assembl y b y
pushin g o n th e mi d rocke r arm . Th e los t motio n
assembl y shoul d compres s full y an d operat e
smoothly throug h its ful l stroke . Replac e the
assembl y i f i t doe s no t wor k smoothly .
After inspection , chec k tha t th e Malfunctio n Indicato r
Lamp doe s no t sho w a n erro r code .
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Valve Clearanc e
Adjustmen t
NOTE:
• Valve s shoul d b e adjuste d cold , whe n th e cylinde r
hea d temperatur e is les s tha n 100° F (38°C) .
• Adjustmen t i s th e sam e fo r bot h intak e an d exhaus t
valves .
• Adjus t valv e clearanc e a t TD C o f eac h cylinder .
• D o no t rotat e th e engin e counterclockwise . Th e tim -
in g bel t coul d jum p a toot h o n th e camshaf t pulleys .
1 . Remov e th e cylinde r hea d covers .
NOTE : Refe r t o page s 6-49 , 6-5 0 whe n installin g th e
cylinde r hea d cover .
EXHAUS T
INTAK E
INTAK E
EXHAUS T
2. Rotat e th e crankshaf t t o se t No . 1 pisto n a t TDC .
• TD C mar k (whit e paint ) o n th e crankshaf t pulle y
shoul d alig n wit h pointe r o n th e timin g lowe r
cover , an d TD C groove s o n th e camshaf t pulley s
shoul d alig n wit h timin g bel t cove r plates .
Numbe r 1 PISTO N a t TD C
TDC MAR K (WHIT E PAINT )
CRANKSHAF T PULLE Y
(cont'd)
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Valve Clearanc e
Adjustmen t (cont'd )
3. Manuall y inspec t th e rocke r arm s fo r independen t
operatio n (se e page s 6-7 , 6-8 ).
4 . Adjus t valve s o n No . 1 cylinder .
• Adjustin g screw s ar e o n primar y an d secondar y
rocke r arms .
Intake : 0.15-0.1 9 m m (0.006-0.00 7 in )
Exhaust : 0.17-0.2 1 m m (0.007-0.00 8 in )
5. Loose n th e locknut , an d tur n th e adjustmen t scre w
unti l th e feele r gaug e slide s bac k an d fort h wit h a
sligh t amoun t o f drag .
TAPPE T ADJUSTE R07MAA-PR7011 0
FEELERGAUGE
TAPPE T LOCKNU T
WRENC H
07MAA-PR7012 0
NOTE: Us e a mirro r t o chec k i f th e specia l too l i s
positione d o n th e locknu t correctly .
FEELERGAUGE
6. Tighte n th e locknu t an d chec k th e clearanc e again .
Repea t adjustmen t i f necessary .
FEELERGAUGE
FEELE RGAUGE
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7. Rotat e th e crankshaf t 120 ° clockwis e (camshaf t pulle y
turn s 60°) . Chec k tha t th e fron t intak e camshaf t pulle y
i s positione d a s shown .
Repea t ste p 3 to ste p 6 .
Numbe r 4 pisto n a t TDC :
8 . Rotat e th e crankshaf t 120 ° clockwis e (camshaf t pulle y
turn s 60°) . Chec k tha t th e fron t intak e camshaf t pulle y
is positione d a s shown .
Repea t ste p 3 to ste p 6 .
Numbe r 2 pisto n a t TDC :
9 . Rotat e th e crankshaf t 120 ° clockwis e (camshaf t pulle y
turn s 60°) . Chec k tha t th e fron t intak e camshaf t pulle y
i s positione d a s shown .
Repea t ste p 3 to ste p 6 .
Numbe r 5 pisto n a t TDC : 10
. Rotat e th e crankshaf t 120 ° clockwis e (camshaf t pulle y
turn s 60°) . Chec k tha t th e fron t intak e camshaf t pulle y
i s positione d a s shown .
Repea t ste p 3 to ste p 6 .
Numbe r 3 pisto n a t TDC :
11 . Rotat e th e crankshaf t 120 ° clockwis e (camshaf t pulle y
turn s 60°) . Chec k tha t th e fron t intak e camshaf t pulle y
is positione d a s shown .
Repea t ste p 3 to ste p 6 .
Numbe r 6 pisto n a t TDC :
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Crankshaft Pulle y an d Pulle y Bol t
Replacemen t
When installin g an d tightenin g th e pulley , follo w th e procedur e below .
Clean , remov e an y oi l an d lubricat e point s show n below .
Clean
Remov e an y oi l
Lubricat e
CRANKSHAF TPULLEY
WASHE R
PULLEY BOL T TIMIN
G BEL T
DRIV E PULLE Y CRANKSHAF
T
TIMIN G BEL T
GUID E PLAT E TIMIN
G BEL T
GUID E PLAT E
Crankshaf t pulle y bol t siz e an d torqu e value :
16 x 1. 5 m m
245 N- m (25. 0 kgf-m , 18 1 Ibf-ft )
NOTE :
• D o no t us e a n impac t wrenc h whe n installing .
• Mak e sur e th e handl e thum b scre w align s wit h th e hol e in th e attachment .
HOLDER HANDL E
07JAB-001020 A M/T
: HOLDE R ATTACHMENT , 4 5 m m
07NA B - 001030 A
A/T : HOLDE R ATTACHMENT , 5 0 m m
07NA B - 001040 A
TORQU E WRENC H
SOCKET, 1 9 m m
07JA A - 001020 A
o r (Commerciall y available )
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Timing Bel t
Illustrate d Inde x
NOTE :
• Refe r t o pag e 6-1 8 fo r positionin g crankshaf t an d pulle y befor e installin g th e belt .
• I f i t i s t o b e reused , mar k th e directio n o f rotatio n o n th e bel t befor e removin g it .
• D o no t us e th e middl e cove r an d lowe r cove r t o stor e remove d items .
• Clea n th e middl e cove r an d lowe r cove r befor e installin g them .
• Replac e th e camshaf t seal s an d crankshaf t seal s i f ther e i s oi l leakage .
• Refe r t o pag e 6-1 2 befor e installin g timin g belt .
CYLINDE R HEA D COVE RRefer t o page s 6-49 , 6-5 0whe n installing .
HEAD COVE R GASKE TReplace whe n leaking ,
damage d o r deteriorated .
Appl y liqui d gaske t a t
th e eigh t corner s o f th e
recesses .
RUBBER SEAL SReplac e whe n damage dor deteriorated .
WASHERSReplace whe n damage d
o r deteriorated .
RUBBER SEAL SReplac e whe n damage dor deteriorated .
MIDDLECOVER
RUBBE R SEAL SReplac e whe n damage dor deteriorated . ADJUSTIN
G BOL T
10 x 1.2 5 mm42 N- m (4. 3 kgf-m , 3 1 Ibf-ft )For adjustmen t only ,
d o no t remove .
LOWER COVE R
6 x 1. 0 m m12 N- m (1. 2 kgf-m ,8.7 Ibf-ft )
CRANKSHAF TPULLEYReplacement ,page 6-1 2
PULLE Y BOL T16 x 1. 5 m m245 N- m (25. 0 kgf-m ,181 Ibf-ft )Replacement ,page 6-1 2Do no t us e a n impac t
wrenc h whe n installing . TIMIN
G BEL T
Inspection , pag e 6-1 4
Adjustment , pag e 6-1 4
Instal l wit h concav e
surfac e facin g out .
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Timing Bel t
Inspectio n
Remove th e ignitio n coi l cover s an d harnes s clamps .
Disconnec t th e connectors , the n remov e th e ignitio n
coils .
Remov e th e cylinde r hea d covers .
Inspec t th e timin g bel t fo r crack s an d coolan t o r oi l
soaking .
NOTE:
• Replac e th e bel t i f coolan t o r oi l soaked .
• Remov e an y oi l o r solven t tha t get s o n th e belt .
Inspec t thi s are a
fo r wear .
Rotate pulle y an d
Inspec t belt .
Tensio n Adjustmen t
CAUTION:
• Alway s adjus t timin g bel t tensio n wit h th e engin e cold .
• D o no t rotat e th e crankshaf t whe n th e adjustin g bol t
i s loos e (th e timin g bel t wil l ski d ove r th e teet h o f
th e rea r intak e camshaf t pulley) .
• Adjus t th e bel t tensio n onl y whe n th e bel t ha s bee n
remove d an d reinstalle d o r replaced .
NOTE:
• Tensione r i s spring-loade d t o appl y prope r tensio n t o
th e bel t automaticall y afte r makin g th e followin g
adjustment .
• Inspec t th e timin g bel t befor e adjustin g th e bel t
tension .
• Alway s rotat e th e crankshaf t clockwise . Rotatin g i t
counterclockwis e ma y resul t i n imprope r adjustmen t
o f th e bel t tensio n o r caus e th e bel t t o jum p a toot h
o n th e camshaf t pulleys .
1. Instal l th e timin g bel t wit h th e No . 1 pisto n a t TD C
(see page s 6-18 , 6-19 ).
2 . Remov e th e slac k i n th e sequenc e o f an d
by turnin g eac h camshaf t pulle y slightly .
3 . Loose n th e timin g bel t adjustin g bol t 180 ° (th e slac k
at shoul d b e eliminated) .
Then, tighte n th e timin g bel t adjustin g bolt .
4. Verif y tha t No . 1 pisto n i s a t TD C (se e pag e 6-19 ).
5 . Rotat e th e crankshaf t clockwis e nin e teet h o n th e
camshaf t pulle y (Th e blu e mar k o n th e crankshaf t pul -
le y shoul d lin e u p wit h th e pointe r o n lowe r cover. )
6 . Loose n th e timin g bel t adjustin g bolt .
7 . Retighte n th e adjustin g bolt , torqu e t o 4. 2 N- m (4. 3
kgf-m , 3 1 Ibf-ft) .
Directio nof rotatio nPOINTE R O NLOWE R COVE R
ADJUSTING BOL T
42 N- m (4. 3 kgf-m ,
3 1 Ibf-ft )
BLUE MAR K
TDC MAR K
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Removal
NOTE:
• Befor e removin g th e belt , tur n th e crankshaf t pulle y
s o th e No . 1 pisto n i s a t to p dea d cente r (TDC ) (se e
pag e 6-19 ).
• Inspec t th e wate r pum p afte r removin g th e timin g
bel t (se e pag e 10-11 ).
• I f i t i s t o b e reused , mar k th e directio n o f rotatio n o n
th e belt .
• Replac e th e timin g bel t a t 105,00 0 mile s (168,00 0 km )
accordin g t o th e maintenanc e schedul e (norma l con -
ditions/sever e conditions) . I f th e vehicl e i s regularl y
driven i n on e o r mor e o f th e followin g conditions ,
replace th e timin g bel t a t 60,00 0 mile s (U.S.A. )
100,00 0 k m (Canada) .
— In ver y hig h temperature s (ove r 110°F , 43°C) .
— In ver y lo w temperature s (unde r -20°F , -29°C) .
1 . Disconnec t th e batter y negativ e termina l first , the n
th e positiv e terminal .
2 . Remov e th e righ t rea r wheel/tire .
3 . Remov e th e engin e oi l coole r bas e assembly .
NOTE : D o no t disconnec t th e hoses .
O-RINGReplace .
4. Remov e th e stru t brac e (se e pag e 5-3 ).
5 . Remov e th e intak e manifol d plat e an d to p cove r (se e
pag e 6-26 ). 4
. Remov e th e ignitio n coi l covers , th e injecto r cove r
an d th e wir e harnes s covers .
5 . Remov e th e ignitio n coil s an d th e connectors .
NOTE:
• Ther e ar e fron t an d rea r ignitio n coil s an d covers .
The y ca n b e identifie d b y th e mar k F F (front ) o r
RR (rear ) printe d o n them .
• Whe n installin g fron t an d rea r ignitio n coi l covers ,
attac h a rubbe r sea l t o th e intak e side .
HARNES SCOVERS
IGNITION COI LCOVE R
CONNECTO R
IGNITION COI L
6. Remov e th e expansio n tank .
NOTE : D o no t disconnec t wate r hoses .
EXPANSIO N TAN K
(cont'd )
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