ACURA NSX 1991 Service Repair Manual

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

7. Remove the flat head screws.
Screw two 8x12 mm bolts into the disc to push it
away from the hub.
NOTE: Turn each bolt two turns at a time to pre-
vent cocking the disc excessively.
FLAT HEAD SCREW

6 x 1.0 mm
10N .
m (1.0 kg-m, 7 Ib-ft)
BRAKE DISC 8x12
mm

BOLTS
8. Remove the hub unit from the knuckle.
SELF-LOCKING NUT
10 x
1.25
mm

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

FRONT HUB UNIT

Corrosion resistant bolt/nut
Front Wheel Bearing Replacement:
1. Pry the spindle nut stake away from the spindle,
then remove the spindle nut.

SPINDLE NUT

26 x 1.5 mm
Replace. Unstake
2. Remove the pulser using a commercially available bearing puller.

PULSER

(cont'd)ProCarManuals.com

Front Suspension

Hub Replacement (cont'd)
3. Separate the wheel bearing from the hub using the

special tools and a press.
CAUTION: Hold onto the hub to keep it from fall-
ing when pressed clear.

HUB
DIS/

ASSEMBLY BASE

07GAF—SD40700
Press

WHEEL

BEARING

Replace.

4. Remove the outboard bearing inner race from the hub using a commercially available bearing puller. NOTE: Replace the bearing with a new one after
removal.
5. Press a new wheel bearing into the hub using the
special tools shown and a press.

Press
HUB ASSEMBLY
DRIVER ATTACHMENT

07GAF—SD40200

SUPPORT BASE

07965—SD90100

6. Install the pulser.
NOTE: Be sure the pulser engages with the pin on

the spindle.

PULSER

PIN

INNER RACE Replace.

NOTE: Wash the bearing and hub thoroughly in
high flash point solvent before reassembly.ProCarManuals.com

7. Tighten the new spindle nut to specified torque,
then stake the spindle nut shoulder against the

spindle.

335 N .
m

(33.5 kg-m, 242 Ib-ft)

Stake

After tightening, use a
drift to stake spindle
nut shoulder against

the spindle.ProCarManuals.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 rear hub and inside of the brake disc.Before installing the wheel, clean the mating surfaces of the brake disc and inside of the wheel.

FLANGE BOLT
10 x
1.25
mm

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

ASSEMBLY

Inspect for faulty

movement and wear.
Replacement, page 18-33
KNUCKLE
SPLASH GUARD
WHEEL NUT
12 x 1.5 mm

110 N .
m (11
kg-m,
80 Ib-ft)
BRAKE DISC
Check for wear or

rust.
Inspection,

Section 19.

REAR HUB UNIT
Check for damage or

cracks.

Replacement, page 18-33.

FLAT HEAD SCREW

6 x 1.0 mm

10 N .
m
(1.0 kg-m,
7 Ib-ft)
Corrosion resistant bolt/nutProCarManuals.com

Rear Suspension
Hub Replacement
1. Remove the center cap, then pry the spindle nut
lock tab away from the spindle and loosen the nut.
2. Raise the car and support it with safety stands (see section 1).

WHEEL NUT
110 N.m

(11 kg-m, 80 Ib-ft)

SPINDLE NUT

26 x 1.5 mm
Replace.

NOTE: After tightening, use a drift
to stake spindle nut shoulder against the driveshaft.

3. Remove the rear wheels.

NOTE: Before installing the wheel, clean the
mating surfaces of the brake disc and inside of the wheel.
4. Remove the spindle nut.
5. Remove the wheel sensor from the knuckle and rear lower control arm.

NOTE:
Do not disconnect the wheel sensor.
Be careful when installing the sensors to avoid
twisting wires.

22 N .
m

(2.2 kg-m,

16 Ib-ft)

WHEEL SENSOR
Corrosion resistant bolt/nut
6. Remove the banjo bolt and disconnect the brake
hose, then remove the brake hose clamp from the
knuckle.
CAUTION: Avoid spilling brake fluid on painted,
plastic or rubber surfaces as it can damage the

finish;

Wash spilled brake fluid off immediately with clean
water.

BANJO BOLT

35 N .
m (3.5 kg-m, 25 Ib-ft)
BRAKE HOSE

WASHER

Replace.
BOLT 6 mm
10 N .
m (1.0 kg-m, 7 Ib-ft)

Corrosion resistant bolt/nut

7. Remove the rear caliper by removing the mounting
bolts.

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

CALIPER ASSEMBLY

Corrosion resistant bolt/nut

10 N
.
m

(1.0 kg-m. 7 Ib-ft)ProCarManuals.com

8. Remove the flat head screws.
Screw two 8x12 mm bolts into the disc to push it
away from the hub.

NOTE: Turn each bolt two turns at a time to pre-

vent cocking the disc excessively.
FLAT HEAD SCREW

6 x 1.0 mm
10 N .
m (1.0 kg-m, 7 Ib-ft)
BRAKE DISC
8x12 mm

BOLT

9. Remove the rear hub unit from the knuckle.
FLANGE BOLT
10 x
1.25
mm

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

REAR HUB UNIT
Corrosion resistant bolt/nut
Rear Wheels Bearing Replacement:

1. Separate the wheel bearing from the hub using the special tools and a press.
CAUTION: Hold onto the hub to keep it from fall-

ing when pressed clear.

Press

HUB DIS/ASSEMBLY
BASE

07GAF—SD40700
HUB DIS/ASSEMBLY PIN

07GAF—SD40100

WHEEL BEARING
Replace.

HUB

2. Remove the wheel bearing inner race from the hub
using a commercially available bearing puller.

HUB DIS/ASSEMBLY PIN

07GAF—SD40100

INNER RACEReplace.
NOTE: Wash the bearing and hub thoroughly in
high flash point solvent before reassembly. (cont'd)ProCarManuals.com

Rear Suspension

Hub Replacement (cont'd)
NOTE: Replace the bearing with a new one after
removal.

3. Press a new wheel bearing into the hub using the
special tools and a press.

Press
HUB ASSEMBLY
DRIVER ATTACHMENT

07GAF—SD40200

WHEEL BEARING
SUPPORT BASE

07965—SD90100

HUB DIS/ASSEMBLY PIN

07GAF—SD40100

4. Install the hub in reverse order of removal.ProCarManuals.com

Rear Damper
Installation (cont'd)
6. Install the rear damper bar on the stud bolts of
damper as shown.

7. Loosely tighten the new self-locking nuts.
REAR DAMPER
BAR
SELF-LOCKING NUT 10 x 1.25 mm
54 N .
m (5.4 kg-m. 39 Ib-ft)
Corrosion resistant bolt/nut

8. Secure the damper mounting nut.
9. Secure the damper assembly to the frame with the
self-locking nuts.

10. Install the rear hatch glass garnish.

TAPPING SCREWREAR HATCH GLASS
GARNISH
Damper Disposal
The dampers contain nitrogen gas and oil under
pressure. The pressure must be relieved beforedisposal to prevent explosion and possible injury
when scrapping.
Always wear eye protection to avoid getting metal
shavings in your eyes when the gas damper pressure
is relieved.
Place the damper on a level surface with its rod extend-

ed and drill a hole of 2.0—3.0 mm (0.08 — 0.12 in)
diameter in the body to release the gas.ProCarManuals.com