low beam ACURA NSX 1991 Service Repair Manual

Engine Removal/Installatio n
Installation
Engine Installation :
Instal l th e engin e in th e revers e orde r o f removal . Reinstal l
th e moun t bolts/nut s i n th e followin g sequence , failur e t o
follo w thes e procedure s ma y caus e excessiv e nois e an d
vibration , an d reduc e bushin g life .
1 . Instal l th e rea r mount , the n tighte n th e bolt s o n th e
transmissio n side .
NOTE : D o no t tighte n th e mountin g bolt .
MOUNTIN G BOL T
Replace .
REA R MOUN T
M/T: 1 2 x 1.2 5 mm105 N- m (10. 5 kg-m , 7 6 Ib-ft )A/T: 1 0 x 1.2 5 mm60 N- m (6. 0 kg-m , 4 3 Ib-ft )
2. Instal l th e fron t mount , the n tighte n th e bolt s i n th e
numbere d sequenc e a s show n
FRONT MOUN T
12 x 1.2 5 mm77 N- m (7. 7 kg-m ,56 Ib-ft )Replace .
10 x 1.2 5 mm60 N- m (6. 0 kg-m , 4 3 Ib-ft )
CORROSIO N RESISTAN T BOLT/NU T
3. Instal l th e subframe , the n tighte n th e subframe-to -
bod y mountin g bolt s (se e sectio n 20 ).
NOTE : Alig n th e bol t hole s o f th e bea m bracket s
an d bod y wit h a tapere d punch .
GUIDE HOL E(BODY )
GUIDE HOL E
(SID E BEAM )
TAPERED PUNC H
4. Instal l th e transmissio n mount , the n tighte n th e bolt s
o n th e transmissio n side .
NOTE : D o no t tighte n th e mountin g bolt .
10 x 1.2 5 mm60 N- m (6. 0 kg-m ,43 Ib-ft )
MOUNTIN GBOLT
TRANSMISSIO NMOUNT
ProCarManuals.com

Cylinder Head s
Installatio n
Rear:
8 x 1.2 5 mm22 N- m (2. 2 kg-m ,16 Ib-ft ) REA
R PRIMAR Y
HO2S45 N- m (4. 5 kg-m ,33 Ib-ft )
B e carefu l no t t o damage .
GASKE T
Replace .
REA R EXHAUS T
MANIFOLD
EXHAUSTMANIFOL DCOVER
SELF-LOCKIN G NU T8 x 1.2 5 mm34 N- m (3. 4 kg-m ,25 Ib-ft )Replace .
Install th e cylinde r head s o n th e engin e block .
Th e cylinde r hea d dowe l pin s an d th e hea d oi l con -
tro l orific e mus t b e aligned .
• Alway s us e a ne w cylinde r hea d gasket .
• Clea n th e oi l contro l orific e befor e installing .
CYLINDE R HEA D OI L CONTRO L CYLINDE R HEA D
GASKE T ORIFICE S GASKE T
Replace . Clean . Replace .
DOWE L PI N DOWE
L
PIN S
O-RIN G
Replace .
4. Tighte n th e cylinde r hea d bolt s sequentiall y i n tw o
o r thre e steps .
• Appl y clea n engin e oi l t o th e bol t thread s an d
washe r contac t surfaces .
Specifie d Torqu e
11 x 1. 5 m m
78 N- m (7. 8 kg-m , 5 6 Ib-ft )
NOTE : W e recommen d usin g a beam-typ e torqu e
wrench . Whe n usin g a preset-typ e torqu e wrench ,
b e sur e t o tighte n slowl y an d no t t o over-tighten .
CYLINDE R HEA D BOLT S TORQU E SEQUENC E
CYLINDER HEA D BOL T11 x 1. 5 m m78 N- m (7. 8 kg-m , 5 6 Ib-ft )Apply clea n engin e oi l t o th ebolt thread s an d washe r contac tsurfaces .
ProCarManuals.com

Transmission Assembly

Removal

20. Remove the intermediate shaft heat cover and the intermediate shaft mounting bolts.
21. Pry the intermediate shaft out of the differential. Pull and remove it. NOTE:
• Coat all precision finished surfaces with clean engine oil or grease.
• Tie plastic bags over the driveshaft ends.

Corrosion resistant bolt/nut
INTERMEDIATE SHAFT
SUPPORT BASE
INTERMEDIATE SHAFT INTERMEDIATE SHAFT
HEAT COVER
INTERMEDIATE SHAFT
MOUNTING BOLT
22. Remove the parking brake cable holder and the wheel sensor wire clamp.
23. Remove the bolt, and separate the toe control arm from the side beam (see section 18).
24. Remove the damper fork bolt (see section 18).
25. Remove the bolts, and separate the lower control arm from the side beam. 26. Pry the driveshaft out of the differential. Pull and remove it. NOTE:
• Coat all precision finished surfaces with clean engine oil or grease.
• Tie plastic bags over the driveshaft ends.

Corrosion resistant bolt/nut
DAMPER FORK BOLT SELF-LOCKING NUT

Replace.

TOE CONTROL ARM
WHEEL SENSOR WIRE CLAMP PARKING BRAKE
CABLE HOLDER
FLANGE BOLT
LOWER CONTROL ARM SELF-LOCKING NUTReplace. ADJUSTING

BOLT
ADJUSTING

CAM
SELF-LOCKING NUT

Replace.
SET RING

Replace.ProCarManuals.com

NOTE: Before removing the gearbox, place a stand jack

under the gearbox and front crossbeam to lightly sup-

port them. Lower the gearbox together with the front

crossbeam.

18. Remove the flange bolts and nuts of the gearbox

and front crossbeam.

10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to Front crossbeam)
FLANGE NUTS

60 N-m (6.0 kg-m, 43 Ib-ft)

10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to front crossbeam)

/

FLANGE NUT

60 N-m

(6.0 kg-m,

43 Ib-ft)

LEFT SIDE:
10 x 97 mm

FLANGE BOLT

(Crossbeam bracket

to Front crossbeam)
FLANGE NUT

60 N-m

(6.0 kg-m, 43 Ib-ft)

10 x 97 mm

FLANGE BOLT

60 N-m

(6.0 kg-m, 43 Ib-ft)

(Gearbox to front

crossbeam)

10 x 68 mm

FLANGE BOLT

60N.m

(6.0 kg-m. 43 Ib-ft)

(Front crossbeam to

crossbeam bracket)

RIGHT SIDE:

10 x 84 mm

FLANGE BOLT

60 N-m

(6.0 kg-m, 43 Ib-ft)

(Gearbox to front

crossbeam)

Corrosion resistant bolt/nut
10 x 68 mm

FLANGE BOLT

60N.m

(6.0 kg-m, 43 Ib-ft)

(Front crossbeam

to crossbeam bracket)
19. Lower the gearbox and front crossbeam with care

so as not to interfere with the radiator pipe.

NOTE: The crossbeam is attached to the crossbeam

bracket with knock pins. Remove the crossbeam by

lightly taping on it with a plastic hammer, then

remove the gearbox.

LEFT CROSSBEAM BRACKET

RIGHT CROSSBEAM

BRACKET

STEERING

GEARBOX

BRACKET

CUSHION B

MOUNT BASE

FRONT CROSSBEAM
GEARBOX

ASSEMBLY

20. When installing the crossbeam to the crossbeam

bracket, be sure to align the holes in the crossbeam

with the knock pins on the crossbeam bracket.

CROSSBEAM

BRACKET

FRONT CROSSBEAM
KNOCK PINProCarManuals.com

Gauge Assembly

Bulb Locations

GAUGE LIGHTS (1.4W x 2)

SRS INDICATOR LIGHT (1.4 W)

RIGHT TURN SIGNAL INDICATOR LIGHT (1.4 W)

EPS INDICATOR LIGHT (1.4 W)

BRAKE SYSTEM LIGHT (1.4 W)

SEAT BELT REMINDER LIGHT (1.4 W)

TCS INDICATOR

LIGHT (1.96 W)

LOW FUEL INDICATOR

LIGHT (1.4 W)

GAUGE LIGHT

(1.4
W)
HIGH BEAM INDICATOR LIGHT (1.4 W)

LEFT TURN SIGNAL INDICATOR LIGHT (1.4 W)

ABS

INDICATOR LIGHT (1.4 W)

CHARGING SYSTEM LIGHT (1.4 W)

MALFUNCTION

INDICATOR

LAMP (MIL)

(1.4W)

LOW OIL PRESSURE

INDICATOR

LIGHT (1.4 W)

GAUGE LIGHT

(1.4
W)

GAUGE LIGHT

(3.0
W)
GAUGE LIGHT

(3.0
W)
GAUGE LIGHT

(3.0
W)
CRUISE INDICATOR LIGHT

(1.96
W)ProCarManuals.com

Engine Removal/Installation
(cont'd )


32. Remove the rear beam rod assembly.
33. Remove the front beam. Lower and suspend the air conditioning (A/C) compressor. Reinstall the frontbeam.

NOTE:

PARKING BRAKE CABLE

Hang with

wire or rope.

FRONT BEAM

REAR BEAM

ROD ASSEMBLY

Remove.

A/C COMPRESSOR

Do not remove the compressor hoses.
Hang the A/C compressor with wire
or rope as shown.
Do not let it hang from hoses.
Retorque the two nuts
NOTE:

Do not remove the compressor hoses.
Do not let the compressor hang from hoses.
34. Remove the left and right parking brake cables.
35. Disconnect the stabilizer bar end links from the knuckles, remove the bar. Separate the dampers
from the knuckles.ProCarManuals.com

Cylinder Heads
Installation (cont'd)
Rear:
8 x
1.25
mm
22 N .
m
(2.2 kg-m,
16 Ib-ft)

HEATED OXYGEN

SENSOR

45 N .
m
(4.5 kg-m,
33 Ib-ft) Be careful not to damage.

GASKET
Replace.

REAR EXHAUST
MANIFOLD

EXHAUST

MANIFOLD

COVER
SELF LOCKING NUTS
8 x
1.25
mm

34 N .
m
(3.4 kg-m,

25 Ib-ft)

Replace.

3. Install the cylinder heads on the engine block. The cylinder head dowel pins and the head oil con-
trol orifice must be aligned.

CYLINDER HEAD

GASKET (METAL)
Replace.
CYLINDER HEAD

GASKET (METAL)

Replace.

HEAD ORIFICES

DOWEL

PIN

DOWEL PIN
O-RING
Replace.
DOWEL

PINS
CYLINDER HEAD BOLTS

11 x 1.5 mm

78 N .
m (7.8 kg-m. 56 Ib-ft)

Apply clean engine oil to the bolt threads and washer contact

surfaces.

CYLINDER HEAD BOLTS TORQUE SEQUENCE

Specified Torque

11 x 1.5 mm

78 N .
m (7.8 kg-m, 56 Ib-ft)
NOTE: We recommend using a beam-type torque
wrench. When using a preset-type torque wrench,
be sure to tighten slowly and not to over-tighten.
Always use a new cylinder head gasket. Apply clean engine oil to the bolt threads and
washer contact surfaces.
4. Tighten the cylinder head bolts sequentially in two
or three steps.ProCarManuals.com

12. Remove the parking brake cable holders from the rear beam rod.

13. Remove the rear beam rod.

14. Remove the front exhaust pipe A.

Corrosion resistant bolt/nut

EXHAUST
PIPE ASELF-LOCKING NUT
Replace.
GASKET

Replace.

GASKET
Replace.
REAR BEAM ROD
1 5. Remove the parking brake cable holder and the wheel sensor wire clamp. 16. Remove the bolt and separate the toe control arm from the side beam (see section 18).
17. Remove the damper fork bolt (see section 18). 18. Remove the bolts and separate the lower control arm from the side beam (see section 18).
19. Pry the driveshaft out of the differential. Pull and remove it. SELF-LOCKING NUT

Replace.
PARKING BRAKE
CABLE HOLDERS
PARKING BRAKE
CABLE HOLDER
FLANGE BOLT
SIDE BEAM TOE CONTROL ARM
SELF-LOCKING NUT Replace. SELF-LOCKING NUT

Replace.

WHEEL SENSOR
WIRE CLAMP
DAMPER FORK BOLT

ADJUSTING

CAM
DRIVESHAFT

ADJUSTING BOLT SELF-LOCKING NUT
Replace.
LOWER CONTROL

ARM

(cont'd)

Corrosion resistant bolt/nutProCarManuals.com

Transmission Assembly

Removal (cont'd)

20. Remove the intermediate shaft heat cover and the intermediate shaft mounting bolts.
21. Pry the intermediate shaft out of the differential. Pull and remove it.

NOTE:

Coat all precision finished surfaces with clean engine oil or grease.
Tie plastic bags over the driveshaft ends.

Corrosion resistant bolt/nut
INTERMEDIATE SHAFT
SUPPORT BASE
SET RINGReplace.
INTERMEDIATE SHAFT
22. Remove the parking brake cable holder and the wheel sensor wire clamp.
23. Remove the bolt and separate the toe control arm from the side beam (see section 18).
24. Remove the damper fork bolt (see section 18). 25. Remove the bolts and separate the lower control arm from the side beam.
26. Pry the driveshaft out of the differential. Pull and remove it.
NOTE:

Coat all precision finished surfaces with clean engine oil or grease.
Tie plastic bags over the driveshaft ends.

Corrosion resistant bolt/nut
DAMPER FORK BOLT
WHEEL SENSOR WIRE CLAMP
LOWER CONTROL ARM SELF-LOCKING NUTReplace. ADJUSTING

BOLT
ADJUSTING

CAM

SELF-LOCKING NUT
Replace.SET RING
Replace.TOE CONTROL ARM
PARKING BRAKE
CABLE HOLDER
FLANGE BOLT
TOE CONTROL ARM
SELF-LOCKING NUT
Replace. INTERMEDIATE SHAFT

MOUNTING BOLT

INTERMEDIATE SHAFT
HEAT COVERProCarManuals.com

12. Install a new set ring on the end of the left driveshaft and intermediate shaft.
13. Install the left driveshaft.
14. Install the lower control arm to the side beam (see section 18).
CAUTION: Align the reference marks on the adjusting bolt, adjusting cam and lower control arm.
1 5. Install the damper fork bolt (see section 18).

16. Install the toe control arm to the side beam (see section 18).

CAUTION: Make sure that the arrow marks on the toe control arm are aligned.
17. Install the wheel sensor wire clamp and parking brake cable holder.
Corrosion resistant bolt/nut

CASTLE NUT
12 x
1.25
mm

95 N .
m (9.5 kg-m, 69 Ib-ft) DAMPER
FORK BOLT

6 x 1.0 mm
10 N .
m

(1.0 kg-m, 7 Ib-ft)

WHEEL SENSOR WIRE CLAMP LOWER CONTROL ARM
SELF-LOCKING NUT
Replace.
14 x 1.5 mm

125 N .
m

(12.5 kg-m. 90 Ib-ft)
ADJUSTING

BOLT
ADJUSTING

CAM

18. Install the intermediate shaft and tighten the intermediate shaft mounting bolts to the intermediate shaft support
base.

19. Install the intermediate shaft heat cover.

Corrosion resistant bolt/nut

SET RINGReplace.

13-49(cont'd)

INTERMEDIATE SHAFT
8 x
1.25
mm

22 N
.
m

(2.2 kg-m, 16 Ib-ft) HEAT COVER

6 x 1.0 mm

10 N .
m (1.0 kg-m. 7 Ib-ft)
SUPPORT BASE SELF-LOCKING NUT
Replace.
14 x 1.5 mm

125 N .
m (12.5 kg-m, 90 Ib-ft) SET RING
Replace. TOE CONTROL ARM
FLANGE BOLT

12 x
1.25
mm

95 N.m

(9.5 kg-m, 69 Ib-ft)

8 x
1.25
mm

22 N
.
m (2.2 kg-m, 16 Ib-ft)
PARKING BRAKE CABLE HOLDER
SELF-LOCKING NUT
Replace.

12 x
1.25
mm

85 N .
m (8.5 kg-m, 62 Ib-ft)ProCarManuals.com