1991 ACURA NSX Service Repair Manual

Inspection

1. Carefully clamp the gearbox in a vise with soft jaws.
2. Remove the boot bands.
BOOT BAND
Replace.

LOCK WASHER

Replace.

(cont'd)

10 cm

(0.4 in)
STEERING INSPECTION ARM

07974-SD90000

60 mm
(2.4
in)

Preload Inspection:

3. Pull the boots away from the ends of the gearbox, unbend the tie-rod lock washers.
4. Hold the rack with a wrench, and unscrew the tie- rods with another wrench.
Rack guide screw adjustment:
Loosen the rack guide screw locknut.
Tighten, loosen and retighten the rack guide screw
two times to 4 N.m (0.4 kg-m, 2.9 Ib-ft), back it off NOTE: Slide the steering rack in the cylinder until
the end of the rack projects 60 mm (2.4 in) from
the cylinder end. Inspection is made near this rack
position.

Install the special tool on the pinion shaft and check
the preload with a spring scale. If the preload is out of the specification, adjust the
rack guide.
Preload 30 N (3 kg, 6.6 Ibs) maximum

20

UnbendProCarManuals.com

Power Steering
Inspection (cont'd)
Retighten the locknut while holding the rack guide
screw with a wrench. Tie-rod installation:
5. Screw each rack end into the rack while holding the
lock washer so its tabs are in the slots in the rack

end.

NOTE: Install the stopper washer with the cham-
fered side facing out.
6. Tighten the rack end securely, then band the lock washer back against the flat on the flange as shown.
NOTE: Coat the stopper washer with grease suffi-

LOCKNUT
25 N.m (2.5 kg-m, 18 Ib-ft)
LOCKNUT WRENCH. 40 mm

07916-SA50001

RACK END

55 N.
m

(5.5 kg-m, 40 Ib-ft)

ciently.

RACK END

TAB

SLOT
STOPPER WASHER
LOCK WASHER

Installation

direction.

bends.ProCarManuals.com

7. Install the boots on the rack end with the tube

clamps.
NOTE:

BOOT

TUBE CLAMP

STEERING GREASE
(Honda P/N 08733-B070E)

Coat the inside of the boot.

SILICONE GREASECoat the sliding surface of the rack end.
8. Install the new boot bands on the boot and bend both sets of locking tabs.
Lightly tap on the doubled portions to reduce their
height.
NOTE: After assembling, slide the rack right and left
to be certain that the boots are not deformed or
twisted. 9. If the tie-rod ends were removed, install the tie-
rods on the right and left rack ends and screw them
in until the threaded section is 11 mm (0.4 in) in

length.

10. Install the gearbox and the front crossbeam (see page 17-66).
11. Check the wheel alignment and adjust if necessary (see section 18).
BOOT BAND
LOCKING TABS
11 mm
(0.4
in)

LOCKNUT

Hand tighten.
TIE-ROD END
Coat the rack end and inside of the boot with the

grease.
Before installing the boot, be sure that the pres-
sure inside of the boot is the atmospheric
pressure. .
Install the boot band with the rack in the straight
ahead condition (i.e. right and left tie-rods are
equal in length).ProCarManuals.com

Power Steering
Ball Joint Boot Replacement
1. Remove the set ring and the boot. CAUTION: Do not contaminate the boot installation
section with grease.
2. Pack the interior of the boot and lip with grease.
5. Insert the special tool into the threads in the ball pin

and align the end of the tool with the groove in the

boot.

Slide the set ring over the tool and into position.

CAUTION: After installing the boot, check the ball pin tapered section for grease. Wipe it if necessary.
3. Wipe the grease off the sliding surface of the ball
pin, then pack the lower area with fresh grease.

CAUTION:
BOOT INSTALLATION SECTION

BALL PIN TAPERED

SECTION

4. Install the boot in the groove of the boot installation section securely, then bleed air.
BOOT INSTALLATION

SECTION

LIP


BALL JOINT BOOT CLIP GUIDE

07MAG-SL00100

Adjust the depth by

turning the tool.
BOOT

SET RING

Keep grease off the boot installation section and
the tapered section of the ball pin.
Do not allow dust, dirt, or other foreign materi-
als to enter the boot.ProCarManuals.com

Power Unit

Replacement

1. Remove the floor mat and speaker cover.
2. Disconnect the connector from the speaker and re- move the speaker by removing the bolt and nut.
SPEAKER COVER 5. Remove the power unit by disconnecting the con-
nector.

10 N.m

(1.0 kg-m, 7 lb-ft)
3. Remove the power unit bracket.
4. Bend terminal nut tabs back and remove the ter- minal nuts and disconnect the cables from the

power unit terminals.

Installation is the reverse order of removal.
NOTE:

SPEAKER

TERMINAL NUT
10 N ·
m

(1.0 kg-m, 7 Ib-ft)

BRACKET

POWER UNIT
10 N
·
m

(1.0 kg-m,

7 Ib-ft)
POWER UNIT

After tightening the terminal nuts, bend up the

terminal nut tabs against the nut securely.
Turn the ignition switch ON and check the EPS

indicator light for operation.ProCarManuals.com

EPS Control unit
Replacement
CAUTION: Be careful not to damage the SRS wire
harnesses when servicing the control unit. 1. Remove the dashboard lower cover and glove box
and disconnect the light connector.
3. Disconnect the connectors from the EPS control
unit by removing the wire harness band.

EPS CONTROL UNIT

4. Remove the power window control unit by pulling it
toward you, then remove the EPS control unit.

5. Installation is the reverse of the removal procedure.
NOTE: Turn the ignition switch ON and check the

EPS indicator light for operation.

HEATER DUCT

2. Move the heater duct right then remove the heater

duct.
DASHBOARD LOWER COVER
GLOVE BOX

EPS CONTROL UNIT
POWER WINDOW CONTROL

UNIT

10 N ·
m

(1.0 kg-m, 7 Ib-ft)

All SRS wire harnesses and connectors
are colored yellow. Do not use electrical test equipment
on these circuits.

CONNECTORSProCarManuals.com

Hub Replacement
NOTE: Use only genuine Honda wheel weights for aluminum wheels. Non-genuine wheel weights may corrode and damage
the aluminum wheels. Remove the center cap by prying it out with a flat screwdriver. Use a rag at the point you are going to pry, because
aluminum alloy wheels can be easily damaged. Avoid damage to the cap by not allowing it to fall during removal.
Before installing the brake disc, clean the mating surface of the front hub and inside of the brake disc.
Before installing the wheel, clean the mating surfaces of the brake disc and inside of the wheel.
Corrosion resistant bolt/nut.
SELF-LOCKING NUT
10 x
1.25
mm

Replace.

65 N .
m (6.5 kg-m, 47 Ib-ft)

SPLASH GUARD

KNUCKLE
SPINDLE NUT

26 x 1.5 mm

Replace.
335 N .
m (33.5 kg, 242 Ib-ft)

NOTE: After tightening,use a drift to

stake the spindle nut shoulder against

the spindle.

PULSER

HUB BEARING

ASSEMBLY
Inspect for faulty

movement and wear.
Replacement page 18-17 FRONT HUB
Check for damage or
cracks.

Replacement,

page 18-17.
BRAKE DISC
Check for wear or rust.
Inspection, section 19.

FLAT HEAD SCREW

6 x 1.0 mm
10 N .
m (1.0 kg-m, 7 Ib-ft) WHEEL NUT

12 x 1.5 mm

110 N .
m (11 kg-m, 80 Ib-ft)
CENTER CAPProCarManuals.com

Front Suspension

Hub Replacement
1. Loosen the wheel nuts slightly.
2. Raise the front of car and support on safety stands in proper locations (see section 1).
3. Remove the wheel nuts and wheel. NOTE: Before installing the wheel, clean the
mating surfaces of the brake disc and inside of the
wheel.

CENTER

CAP

WHEEL NUT
110 N .
m

(11 kg-m, 80 lb-ft)

4. Remove the brake hose mounting bolts.

FRONT BRAKE HOSE

BRAKE HOSE MOUNTING BOLTS

Corrosion resistant bolt/nut
5. Remove the wheel sensor from the knuckle and
front lower control arm.
Do not disconnect the wheel sensor.
Be careful when installing the sensors to avoid
twisting wires. 10N.
m
(1.0 kg-m, 7 lb-ft)

WHEEL

SENSOR

22 N.
m

(2.2 kg-m, 16 Ib-ft)

Corrosion resistant bolt/nut

6. Remove the caliper bracket mounting bolts and hang the caliper assembly to one side.
CAUTION: To prevent accidental damage to the
caliper assembly or brake hose, use a short piece of

wire to hang the caliper assembly from the

undercarriage.

CALIPER BRACKET MOUNTING BOLTS
110 N .
m (11 kg-m, 80 Ib-ft)

10 N .
m

(1.0 kg-m. 7 Ib-ft)

Corrosion resistant bolt/nut

22 N
.
m (2.2 kg-m, 16 Ib-ft)
NOTE:ProCarManuals.com