roof ACURA NSX 1991 Service Repair Manual

Cylinder Heads

Removal

Engine removal is not required for this procedure. Make sure jacks and safety stands are
placed properly and hoist brackets ere attached to cor- rect positions on the engine.
CAUTION: Use a fender cover (special tool) to avoid damaging
painted surfaces. Unplug the wiring connectors carefully while holding
the connector portion to avoid damage.
To avoid damaging the cylinder heads, wait until the
engine coolant temperature drops below 100°F
(38°C) before loosening the retaining bolts. Do not open the engine cover when the roof panel is
stored (NSX-T open top).
NOTE:
Unspecified items are common.

Mark all wiring and hoses to avoid misconnection.
Also, be sure that they do not contact other wiring or

hoses or interfere with other parts.

Inspect the timing belt before removing the cylinder

head.

Turn the crankshaft pulley SO that the No. 1 piston is at top dead center (see page 6-19 ('91-'93) or ('94-'96)).
1. Disconnect the negative terminal from the battery.
2. Remove the expansion tank cap. Use care when removing the expan-
sion tank cap to avoid scalding by engine coolant
or steam.
3. Raise the car, then remove the right rear wheel/tire.
4. Drain the engine coolant (see page 10-5 ). 5. Remove the engine under guard, then remove the
front exhaust pipe A.

GASKETS
Replace.

FRONT EXHAUST

PIPE A

SELF-LOCKING NUT

10 x
1.25
mm

55 N·m (5.5 kg-m, 40 Ib-ft)
Replace.
SELF- LOCKING NUT

8 x
1.25
mm

22 N·m (2.2 kg-m. 16 Ib-ft)

Replace.

6. Remove the rear exhaust pipe A.

SELF- LOCKING NUT

8 x
1.25
mm
22 N·m (2.2 kg-m, 16 Ib-ft)

Replace.

REAR

EXHAUST

PIPE A

SELF-LOCKING NUT
10 x
1.25
mm

55 N·m (5.5 kg-m.

40 Ib-ft)

Replace.
GASKETS

Replace.

7. Remove the engine oil cooler base assembly (see
page 6-15 ('91-'93) or ('94-'96).

8. Lower the car.
9. Remove the strut brace (see page 5-3 ).ProCarManuals.com

Construction
Features
• Mid-engin e ca r wit h ground-hugging , full-forwar d canop y design .
• Th e lowe r bod y i s AH-P O fo r greate r resistanc e t o corrosio n an d collisio n damage .
• Oute r panels , (excep t th e roof ) ar e constructe d o f individua l panel s t o allo w mor e convenien t an d economica l repairs .
• I n consideration s o f rigidity , surfac e smoothnes s an d simultaneou s bod y painting , th e trun k li d spoile r i s mad e o f
UP-G .
Straight-lin e fron t side-fram e fo r excellen t absorptio n o f fron t impac t energy .
Extruded-molde d sid e sill s wit h hig h strengt h an d rigidity .
Lowe r par t o f cente r pilla r i s designe d a s flare-typ e an d unite d solidl y t o mai n frame , thu s greatl y improvin g rigidity .
Al l main-fram e part s ar e joine d smoothly , providin g hig h impac t strengt h an d improvin g bod y rigidity .
Larg e cross-sectio n rea r fram e t o protec t fue l tan k i n th e even t o f rea r impact .
Rea r fender s ar e detachabl e t o mak e mino r collisio n repair s easier .
REAR SID EFRAM E
FRONT SID E FRAM E REA
R BULKHEA D CENTE R
REA R FLOO R CROS S MEMBE R
FRON T LOWE R
CROS S MEMBE R REA
R BULKHEA D CENTE R
LOWE R CROS S MEMBE R
SID
E SIL L
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Construction
Composition
REAR HATC HFRAMETRUNK LI D (#6000 )
HOOD(#6000 )
SIDE SIL L (#6000 )
REAR FENDE R (#6000)
Body Composite s(#5000)
DOOR (#6000 )
FRONT FENDE R (#6000 )
Types o f aluminu m alloys for pressings :
ROOF PANE L(#6000 )
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Roof Rai l Trim , Fron t an d Rea r
Replacemen t
CAUTION:
• Wea r glove s t o remov e an d instal l th e trim .
• Whe n pryin g wit h a fla t ti p screwdriver , wra p it wit h
protectiv e tap e t o preven t damage .
NOTE:
• Tak e car e no t t o scratc h th e trim .
• Remov e th e roof .
Fron t roo f rai l trim :
1 . Remov e th e sunviso r fro m eac h side .
Scre w location , 4
SUNVISO R
2. Pul l awa y th e doo r trim , the n lowe r th e fron t pilla r
tri m b y detachin g th e clip s fro m eac h side . The n
remov e th e screws .
Screw locations , 4
Clip locations , 8
DOO R TRI M
3. Remov e th e fron t roo f rai l tri m b y slidin g i t rearward .
Hook locations , 4
FRONT ROO F
RAI L TRI M
4. Installatio n i s th e revers e o f th e remova l procedure .
NOTE:
• I f necessary , replac e an y damage d clips .
• Mak e sur e th e doo r tri m is installe d securely .
FRONT ROO F
RAI L TRI M FRON
T PILLA RTRIM
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Roof Rai l Trim , Fron t an d Rea r
Replacemen t
Rear roo f rai l trim :
1 . Remov e th e ceilin g ligh t (se e sectio n 23 ).
2 . Pul l awa y th e doo r trim , the n lowe r th e rea r pilla r
tri m b y detachin g th e clip s fro m eac h side . The n
remov e th e screws .
Screw locations , 2Cli p locations , 6
REA R ROO FRAIL TRI M
DOO RTRIM
REA R PILLA RTRIM
3. Detac h th e clips , an d remov e th e rea r receive r
dampe r fro m eac h side .
REAR RECEIVE RDAMPER
Clip locations , 2
REA R ROO FRAIL TRI M
4. Remov e th e rea r roo f rai l tri m b y slidin g it forward .
Hook locations , 4
REA R ROO FRAIL TRI M
5. Installatio n is th e revers e o f th e remova l procedure .
NOTE:
• I f necessary , replac e an y damage d clips .
• Mak e sur e th e doo r tri m is installe d securely .
REAR RECEIVE RDAMPER
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Roof
Inde x
ROO F
HOOK STO P
(se e pag e 20-94 )
SHIM
REA R RECEIVE RDAMPERSHIM
REA R RECEIVE RSWITCH
SID E LOC K
RELEAS E KNO B ROO
F SID E LOC K
Replacement ,page 20-8 3
ROO F LOC K
GUID EReplacement ,
pag e 20-9 0
FRON T LOC K RECEIVE R
Replacement , pag e 20-9 2
Adjustment , pag e 20-9 2
ROOF SID E
LOC K HANDL EREAR ROO FSTOP GUID EReplacement ,
pag e 20-9 1 REA
R LOC K RECEIVE R
Replacement , pag e 20-9 2
Adjustment , pag e 20-9 2
ROO F LOC K GUID E
Replacement , pag e 20-9 0
ROO F SID E RETAINE R
Replacement , pag e 20-8 4
RIGH T ROO F
SID E TRI M
(se e pag e 20-82 ) ROO
F TRI M PANE L
(se e pag e 20-83 )
SHIM
ROO F SID E SEA L
Replacement , pag e 20-8 4
ROO F FRON T TRI M
(se e pag e 20-82 ) LEF
T ROO F
SID E TRI M
(se e pag e 20-82 )
ROO
F GRI P
ROO
F SID E
HOO K
ROOF
SIDELOC K UNI T
Replacement , pag e 20-8 9
Adjustment , pag e 20-10 6
REAR ROO FHOLDE R
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Roof
Roof Trim/Pane l Replacemen t
CAUTION:
• T o preven t damage , plac e th e roo f o n a n appropriat e
pad.
• Whe n pryin g wit h a fla t ti p screwdriver , wra p it wit h
protectiv e tap e to preven t damage .
NOTE : Tak e car e no t t o scratc h th e trim , pane l an d roof .
1 . Remov e th e roof .
2 . Remov e th e roo f fron t trim .
>: Cli p locations , 4
ROO F FRON T
TRIM
3. Remov e th e roo f sid e loc k handl e fro m eac h side .
ROO F SID E
LOC K HANDL E Scre
w locations , 2
4 x 0. 7 m m1.5 N- m (0.1 5 kg-m ,1.1 Ib-ft )
CAP
4. Remov e th e roo f sid e tri m fro m eac h side .
NOTE : D o no t sna p th e hooks .
ROOF SID ETRIM
5. Remov e th e roo f grip .
Scre w locations , 2
ROO F GRI P
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6. Move the rear roof stop guide on each side as

shown.

NOTE: Do not disturb the bonded portion of the roof

side seal.

SCREWS

4 x 0.7 mm

1.5 N-m
(0.15 kg-m,

1.1 Ib-ft)

ROOF SIDE

SEAL

BONDED

PORTION

ROOF

TRIM

PANEL
REAR ROOF

STOP GUIDE
SCREW

4 x 0.7 mm

Remove.

7. Detach the hooks by sliding the roof trim panel

back, then remove it.

Hook locations, 3

ROOF TRIM

PANEL

8. Installation is the reverse of the removal procedure.

NOTE: If necessary, replace any damaged clips.ProCarManuals.com

Roof Sid e Loc k Replacemen t
CAUTION: T o preven t damage , plac e th e roo f o n a n
appropriat e pad .
1 . Remov e th e roof .
2 . Remov e th e roo f fron t tri m an d roo f sid e tri m (se e
pag e 20-82 ).
3 . Instal l th e roo f sid e loc k handle .
4 . Tur n th e roo f sid e loc k handle , the n remov e th e
screws .
Screw locations , 3
5 x 0. 8 m m5 N- m (0. 5 kg-m ,3.6 Ib-ft )
ROOF SID E
LOC K
5. Retur n th e roo f sid e loc k handl e t o th e unlocke d
position , the n remov e it .
ROO F SID E
LOC K HANDL E
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Roof

Roof Side Lock Replacement

(cont'd)

6. Move the roof side lock, then pull the lock pins out

and remove the lock.

NOTE: Take care not to bend the rods and lock pins.

LOCK

PIN

ROOF SIDE

LOCK

LOCK

PIN

7. Installation is the reverse of the removal procedure.

NOTE:

• Grease the location indicated by the arrow and

the lock pins.

• Make sure the roof side lock works smoothly.
ROD
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