1991 ACURA NSX seats

4. Working from the camshaft side, use the driver and
an air hammer to drive the guide about 2 mm

towards the combustion chamber. This will knock

off some of the carbon and make removal easier.

VALVE GUIDE DRIVER
07742–0010100
5. Turn the head over and drive the guide out toward the camshaft side of head.

If a valve guide still won't move, drill it out with a
5/16 inch bit, then try again.

CAUTION: Drill guides only in extreme cases: you
could damage the cylinder head if the guide breaks.
6. Remove the new guide(s) from the refrigerator, one
at a time, as you need them.

Do not use a torch; it may warp the head.
Do not get the head hotter than 300 °F (150°C)
excessive heat may loosen the valve seats.
To avoid burns, use heavy gloves when handling
the heated cylinder head.
Valve Guides

Replacement

1. As illustrated in the removal steps of this pro- cedure, use a commercially—available air-impact
driver attachment modified to fit the diameter of
the valve guides. In most cases, the same pro- cedure can be done using the Valve Guide Driver

and a conventional hammer.

COMMERCIALLY AVAILABLE
VALVE GUIDE DRIVER
5.3 mm

(0.21
in)

87 mm
(3.43 in.)
57 mm

(2.24 in.)
10.8
mm

(0.42
in)

Removal and Installation

VALVE GUIDE DRIVER
07742–0010100

2. Select the proper replacement guides and chill them in the freezer section of a refrigerator for about an

hour.

3. Use a hot plate or oven to evenly heat the cylinder
head to 300°F (150°C). Monitor the temperature

with a cooking thermometer.

CAUTION: Always wear safety goggles or a face shield when
using the air hammer.
Hold the air hammer directly in line with the valve
guide to prevent damaging the driver.
CAUTION:ProCarManuals.com

Valves, Valve Springs and Valve Seals

Valve Spring and Valve Seal Installation Sequence

NOTE: Exhaust and intake valve seals are NOT interchangeable.

INTAKE VALVE SPRING

NOTE: Place the end of valve

spring with closely wound coils

toward the cylinder head.

INTAKE VALVE SEAL

(WHITE SPRING)

Replace.

VALVE SEAL INSTALLER

KD-2899

VALVE SEAL

Replace.
VALVE KEEPERS

VALVE SPRING

RETAINER

VALVE SPRING

EXHAUST VALVE SEAL

(BLACK SPRING)

Replace.

SPRING SEAT

NOTE: Install the valve spring seats

before installing the valve seals.ProCarManuals.com

Press the new lower bearing into the gearbox
housing until it seats using a press and special

tool.

NOTE:
Install the lower bearing with the wider side of

the outer race toward the bottom of the

gearbox. Hold the outer race with the tool securely.
Do not allow dust and other foreign materials to
enter the lower bearing.

Press

LOWER

BEARING

P/S ADJUSTMENT GUIDE

07973-6920001

11. Insert the steering rack into the cylinder housing, being careful not to damage the steering rack
sliding surface.
STEERING RACK
CYLINDER

HOUSING
12. Install the steering pinion into the gearbox.
NOTE: Do not engage the steering pinion with the
steering rack this time.

STEERING PINION

GEARBOX
13. If the pinion dust seal was removed, drive in the
new dust seal until it bottoms on the step on the pi-

nion set screw.
14. Grease the sealing lip of the pinion dust seal.
PINION

SET SCREW
PINION

DUST SEAL

Bottom here.
Bottom here.

(cont'd)ProCarManuals.com

Carpet
Replacement
SRS wire harnesses are routed near the carpet. CAUTION:
Remove:
2. Detach the clips at the front edge (passenger's). 3, Remove the console carpet attaching screw from the heater unit (passenger's).
4. Disconnect the air duct (driver's) and air vent, then remove the carpet hooks from the dashboard inside screws.
DASHBOARD

INSIDE SCREW
CARPET
HOOK
(3)

AIR VENT

AIR DUCT
AIR VENT

CLIPS
FLOOR
CARPET
CONSOLE
CARPET

CONSOLE CARPET LEFT DASH
SENSOR
PASSENGER'S

AIRBAG
RIGHT DASH

SENSOR

SRS
MAIN

HARNESS
SRS UNIT

Side sill pad (See page 20-38) Rear side trim panel (See page 20-38)
Center armrest (See page 20-49)
Center console panel (See page 20-52)

SRS UNIT
SCREW
(cont'd)
Seats (See page 20-39)
Footrest
Under-dash fuse box lid (See page 20-38)
Side sill trim (See page 20-38)

All SRS wiring harnesses are covered with
yellow outer insulation.
Before disconnecting any part of the SRS wire
harness, install the short connectors (see page

23-328).
Replace the entire affected SRS harness assem-
bly if it has an open circuit or damaged wiring.ProCarManuals.com

Replacement

SRS wire harnesses are routed near the dashboard and

steering column.
CAUTION:All SRS wiring harnesses are covered with
yellow outer insulation.Before disconnecting any part of the SRS wire
harness, install the short connectors (see page
23-328).

Replace the entire affected SRS harness assem-
bly if it has an open circuit or damaged wiring.
LEFT DASH

SENSOR
PASSENGER'S

AIRBAG

RIGHT DASH
SENSOR

SRS MAIN

HARNESS
SRS UNIT

1. To remove the dashboard, first remove the: Seats (See page 20-39('93-'96))
Dashboard lower cover (Driver's) (See page
20-54))

Knee bolster and pad (See page 20-54)
Dashboard brace (See page 20-54)
Center armrest (See page 20-49)

Clock, center air vent and console panel (See

pages 20-50, 51, 52)

Climate control unit and stereo cassette/radio
(See page 20-53)Dashboard lower cover (Passenger's) (See page

20-53)

Glove box lid and glove box (See page 20-53)

2. Lower the steering column (see section 17).
To avoid accidental deployment and NOTE:
Remove the access panel, then remove the
short connector (RED). Disconnect the connec-
tor between the airbag and cable reel, then con- nect the short connector (RED) to the airbag

connector.

AIRBAG
CONNECTOR
CABLE REEL

CONNECTOR
ACCESS PANEL SHORT CONNECTOR

(RED)

Connect the special tool to the cable reel

connector.

CABLE REEL
CONNECTOR
SHORT
CONNECTOR
(RED)

SRS
SHORT CONNECTOR

07MAZ–SP00200

(cont'd)

possible injury always install the short connector
on the airbag connector when the SRS wire
harness is disconnected.ProCarManuals.com

Seat Belts

Replacement

CAUTION: Check the seat belts for damage and replace them if necessary. Be careful not to damage them durinc

removal and installation.

NOTE: Remove the anchor bolts with a 1 7 mm socket or box-end wrench.1. To remove the seat belts, first remove the seats (page 20-38). NOTE: Take care not to scratch the interior trim, dashboard and center armrest.
2. Remove the cap and remove the lower anchor bolt.
3. Remove the center anchor bolt, and disconnect the connector.
4. Remove the rear pillar trim panel and side panel (page 20-37). 5. Remove the upper anchor bolt and retractor bolts. RETRACTOR BOLT

7/16-20 UNF

32 N·m (3.2 kg-m, 23 Ib-ft) 6 x 1.0 mm
10 N·m (1.0 kg-m, 7.2 Ib-ft)
TOOTHED
LOCK WASHER
SPRING WASHER TOOTHEDLOCK WASHER
SPRING WASHER
PROTECTOR

BAG

* CENTER AN CHOR BOLT
7/16-20 UNF

32 N·m (3.2 kg-m, 23 Ib-ft)
6. Check that the retractor locking mechanism func-
tions as described on page 20-40.

7. Installation is the reverse of the removal procedure.
NOTE:
Make sure you assemble the washers and col-
lars on the upper and lower anchor bolts as

shown.
Before attaching the rear pillar trim panel, make

sure there are no twists or kinks in the belts.
On reassembly, replace the anchor bolts (*) and

use liquid thread lock.

TOOTHED

LOCK WASHER
* LOWER ANCHOR BOLT
7/16-20 UNF

32 N·m (3.2 kg-m, 23 Ib-ft)
SPRING WASHER
CAP

REAR PILLAR TRIM PANEL
Replacement, page 20-37
BEARING

PLAIN
WASHER
* UPPER ANCHOR BOLT

7/16-20 UNF

32 N·m
(3.2 kg-m,
23 Ib-ft) TOOTHED
LOCK WASHERProCarManuals.com

SRS wire harnesses are routed near the carpet.

CAUTION:
All SRS electrical wiring harnesses are covered with yellow outer insulation.
Before disconnecting the SRS wire harness, install the short connector on the airbag (see page 23-323).
Replace the entire effected SRS harness assembly if it has an open circuit or damaged wiring.
1. To remove the carpet, first remove the: Seats (page 20-39)
Footrest
Under-dash fuse box lid (page 20-38)

Side sill trim (page 20-38)

• Side silt pad (page 20-38)
• Rear side panel (page 20-38)
• Center armrest (page 20-38)
• Center console panel (page 20-43)

CARPETHOOK

(3)

CONSOLE CARPET

FOOTREST MOUNTING

BOLTS

5. Installation is the reverse of the removal procedure. NOTE:
Take care not to damage, wrinkle or twist the carpet.

Make sure the console carpet air vents are inserted into the heater unit and air duct.

Make sure the seat harnesses are routed correctly.

Carpet

Replacement

SRS UNIT

SRS MAIN

HARNESS FLOOR CARPETS

SRS UNIT

CONSOLE
CARPETS
CONSOLE
CARPET

FLOOR

CARPET INSIDE SCREW
CLIPS

AIR DUCT

CONSOLE

CARPET

FOOTREST

2. Pull up the retainers and carpet clips at the front edge (passenger's side), then remove the floor carpet.
3. Remove the console carpet attaching screw from the heater unit (passenger's side).
4. Remove the carpet hooks from the dashboard inside screws, then remove the console carpet.

L. DASH

SENSOR
R. DASH

SENSORProCarManuals.com

Replacement

SRS wire harnesses are routed near the dashboard and
steering column,

CAUTION:
AH SRS electrical wiring harnesses are covered
with yellow outer insulation.
Before disconnecting the SRS wire harness, in-
stall the short connector on the airbag (see page

23-232).
Replace the entire effected SRS harness

assembly If it has an open circuit or damaged
wiring.

R. DASH

SENSOR

L. DASH

SENSOR

SRS MAIN

HARNESS

SRS
UNIT
1. To remove the dashboard, first remove the: Seats (page 20-39)
Dashboard tower panel (driver's side)
Knee bolster and pad (page 20-44)

Dashboard stay (page 20-44)

Center armrest (page 20-43)

Clock, center air vent and console panel (page

20-43)

Heater control unit and stereo cassette/radio
(page 20-43)
Dashboard lower panel (passenger's side)
Glove box lid and glove box (page 20-43)
To avoid accidental deployment and
possible injury always install the protective short
connector on the inflator connector when the
harness is disconnected.

SHORT

CONNECTOR
(cont'd)

DASHBOARD
SIDE AIR VENT

5. Remove the attaching screws, then remove the
side air vents from each side of the dashboard.
INSTRUMENT

PANEL

GAUGE ASSEMBLY

3. Remove the instrument panel.
4. Remove the gauge assembly.
8 x
1.25
mm

23 N·m
(2.3 kg-m,

17 lb-ft)
8 x 1.25 mm

16 N·m
(1.6 kg-m,

12 Ib-ft)

STEERING COLUMN

2. Lower the steering column (see Section 17).
NOTE: To prevent damage to the steering column,

wrap with a shop towel.ProCarManuals.com