1997 ACURA NSX Service Repair Manual

Engine Removal/Installatio n
Removal
• Mak e sur e jack s an d safet y stand s ar e place d properl y
an d hois t bracket s ar e attache d t o th e correc t posi -
tion s o n th e engin e (se e sectio n 1 ).
• Mak e sur e th e ca r wil l no t rol l of f stand s an d fal l
whil e yo u ar e workin g unde r it .
CAUTION :
• Us e a fende r cove r (specia l tool ) t o avoi d damagin g
painte d surfaces .
• Unspecifie d item s ar e common .
• Unplu g th e wirin g connector s carefull y whil e holdin g
th e connecto r portio n t o avoi d damage .
• Mar k al l wirin g an d hose s t o avoi d misconnection .
Also , b e sur e tha t the y d o no t contac t othe r wirin g o r
hose s o r interfer e wit h othe r parts .
• I f th e groun d clearanc e need s t o b e increased , us e a
scissor s jac k an d instal l rubbe r spacer s i n th e coi l
spring s (se e sectio n 1 ).
• Pu t rubbe r pad s unde r th e jackin g point s whe n usin g
jack s o r safet y stand s t o avoi d damagin g th e bod y
(se e sectio n 1 ).
1 . Mov e th e sea t bottom s an d back s a s fa r forwar d a s
the y wil l go .
2. Remov e th e rea r hatc h assembl y an d engin e cove r
(se e sectio n 20 ).
3 . Disconnec t th e batter y negativ e termina l first , the n
the positiv e terminal .
4. Remov e th e stru t brac e (NSX- T (ope n top)) .
NSX FENDE R COVE R07MAZ - SL0000 A
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Removal (cont'd)
Engine Removal/Installation

5. Disconnect the fan motor connector, then remove

the engine room fan assembly (A/T).
7. Disconnect the spark plug voltage detection module

connectors, ground cable and engine wire harness

clamps.

8. Disconnect the fuel pump resistor connector.

9. Disconnect the injector resistor connector and

ground cable (A/T).
6. Remove the rear trim panels behind the passenger's

seat, then disconnect four connectors from the

engine control module (ECM) and three connectors

from the floor wire harness.ProCarManuals.com

10. Reliev e fue l pressur e (se e sectio n 11 ).
D o no t smok e whil e workin g o n th e
fue l system . Kee p ope n flam e awa y fro m wor k
area . Drai n fue l onl y int o a n approve d container .
11 . Remov e th e fue l fee d pip e an d fue l retur n hose .
12 . Remov e th e wir e harnes s cover , the n remov e th e
fue l pip e clamp .
14. Remov e th e expansio n tan k cap .
15 . Rais e th e hois t t o ful l height .
16 . Drai n th e engin e coolan t (se e pag e 10-5 ).
• Loose n th e drai n plu g fro m th e radiato r lowe r
tank.
• Remov e tw o drai n bolt s fro m th e wate r pipes .
Reinstal l th e drai n bolt s wit h ne w washers .
• Loose n th e fron t an d rea r engin e drai n bolt s t o
drai n engin e coolan t fro m th e cylinde r heads .
Connec t rubbe r hose s t o th e drai n bolts .
17 . Drai n th e transmissio n fluid . Reinstal l th e drai n plu g
wit h a ne w washer .
18 . Drai n th e engin e oil . Reinstal l th e drai n plu g wit h a
ne w washer .
19 . Lowe r th e hoist , the n remov e th e ai r cleane r hous -
in g (se e pag e 6-26 ).
20 . Disconnec t tw o hoses , the n remov e th e expansio n
tank.
13. Remov e th e brak e booste r vacuu m hos e an d evapo -
rativ e emissio n (EVAP ) contro l caniste r hose .
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21. Disconnect the engine wire harness connectors.

22. Remove the battery cable from the main fuse box.
24. Disconnect the two connectors from the emission

control box, then remove the control box.

• Do not disconnect the vacuum hoses.
Removal (cont'd)
Engine Removal/Installation

23. Disconnect the throttle body 6P connector, and

remove the ground cable and starter cable.
25. Remove the radiator hoses and heater hose.ProCarManuals.com

26. Loose n th e idle r pulle y cente r nu t an d adjustin g nut ,
the n remov e th e ai r conditionin g (A/C ) compresso r
belt . 28
. Rais e th e hois t t o ful l height .
29 . Remov e th e slav e cylinde r (M/ T se e sectio n 12 ).
• D o no t disconnec t th e clutc h hose .
30. Remov e th e lowe r cover , the n remov e th e shif t
cabl e an d selec t cabl e (M/ T se e sectio n 13 ).
31 . Remov e th e cabl e cover , the n remov e th e shif t
cabl e (A/T) .
NOTE :
• Tak e car e no t t o ben d th e cabl e whe n removin g
it . Alway s replac e a kinke d cabl e wit h a ne w one .
• Adjus t th e cabl e whe n installing .
32 . Remov e th e engin e unde r guar d an d th e cente r ro d
assembly .
27 . Mov e th e trun k carpet , an d disconnec t th e righ t rea r
whee l senso r connector . Pus h th e wir e an d connec -
to r throug h th e bod y hol e int o th e engin e compart -
ment.
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Engine Removal/Installatio n
Removal (cont'd )
33. Remov e th e lef t an d righ t parkin g brak e cable s (se e
sectio n 19 ).
34 . Remov e th e rea r bea m ro d assembl y an d parkin g
brak e cabl e clamps . 36
. Remov e th e A/ C compresso r (se e sectio n 22 ), the n
suspen d i t fro m th e body .
NOTE :
• D o no t remov e th e compresso r hoses .
• D o no t le t th e compresso r han g b y it s hoses .
37 . Reinstal l th e fron t bea m an d fron t engin e mount .
38 . Remov e th e rea r brak e hoses , the n plu g th e brak e
pipe s wit h rubbe r cap s (se e sectio n 19 ).
39 . Disconnec t th e lef t rea r whee l senso r connector ,
the n remov e th e whee l senso r wir e clamp s an d sta -
bilize r link .
35
. Remov e th e fron t engin e mount , the n remov e th e
fron t beam .
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40. Remov e th e righ t whee l senso r wir e clamp s an d
stabilize r link . 43
. Remov e th e muffle r (M/T) .
44 . Positio n th e specia l too l unde r th e car . Lower the ca r
jus t abov e th e fixture . Wit h th e hel p o f a n assistant ,
attac h th e fixtur e t o th e subfram e wit h tw o 1 2 m m
nut s an d tw o 1 0 m m bolts .
41
. Disconnec t th e fron t secondar y heate d oxyge n senso r
connector , the n remov e th e fron t exhaus t pip e A ,
fron t thre e wa y catalyti c converte r (TWC) and fron t
join t pip e assembl y (A/T) .
42 . Separat e th e rea r join t pip e fro m th e muffle r (A/T) .
45. Adjus t th e pad s o n th e fixtur e t o suppor t th e oi l pa n
an d transmissio n housing .
46 . Lowe r th e ca r s o th e fixtur e i s restin g o n it s caster s
(o r appropriat e platform) .
ENGINE REMOVAL /
INSTALLATIO N
FIXTUR E
07MA K - PR7020 A
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Removal (cont'd)
Engine Removal/Installation

47. Remove the two bolts from the side engine mount

near the alternator. Pivot the mounting bracket into

the housing of the body.
49. Remove the twelve subframe-to-body mounting

bolts.

50. Raise the car a few inches.

51. Check that all wires and hoses are disconnected

from the engine assembly.

52. Raise the car completely off the engine/suspension

assembly. Roll the assembly from under the car.

48. Remove the transmission mounting bolt.ProCarManuals.com