20691bebf24b06c5fcc115ce067563061af102ff390ec4f4826983368a3f30da

nsxd05013a.pdf

Exhaust System
Dual Exhaust System
A compact dual exhaust system is used to provide low back pressure.
Sound tuning has been optimized to give a sporty exhaust sound note suitable to this type of car. This is done by a col-
lection chamber in muffler.
MUFFLER
REAR
EXHAUST
PIPE
REAR EXHAUST
MANIFOLD
FRONT THREE WAY CATALYTIC
CONVERTER
REAR THREE WAY CATALYTIC
CONVERTER
FRONT
EXHAUST
PIPE
FRONT EXHAUST
MANIFOLD
Exhaust gas
from
rear bank
COLLECTION CHAMBERExhaust gas
from
front bank
Features

Attachments

70f4d5056583ea70ea735e78c7670b7141038a90f37ce32c4ab9855efce0e19f

nsxd05011a.pdf

Lubrication System
Lubrication Flow
VTEC SOLENOID VALVE
ROCKER SHAFT
ORIFICES
M M M
CYLINDER HEAD
ORIFICE
OIL SCREEN
OIL PUMP
RELIEF VALVE
OIL FILTER
ENGINE COOLANT
ENGINE OIL
COOLER
CYLINDER HEAD
ORIFICE
ROCKER SHAFT
ORIFICES
P: PRIMARY
M: MID
S: SECONDARY
M M M
VTEC SOLENOID VALVE
No. 3
M M M
No. 1No. 2
M M M
No. 6 No. 5 No. 4
Front
Rear
CRANKSHAFT
MAIN JOURNAL
MAIN BEARING
CAP BRIDGE

Attachments

7df0df0a9310fda8c5a4efa1c7337f9565d8df1bdce0f8879ac3abea9212626f

nsxb05011a.pdf

Installation
Additional Torque Value Specifications:
NOTE: For manifold replacement, refer to section 9.
Engine Removal/Installation

Engine Removal/Installation
Installation
Engine Installation:
Install the engine in the reverse order of removal. Reinstall
the mount bolts/nuts in the following sequence, failure to
follow these procedures may cause excessive noise and
vibration, and reduce bushing life.
1. Install the rear mount, then tighten the bolts on the
transmission side.
NOTE: Do not tighten the mounting bolt.
MOUNTING BOLT
Replace.
REAR MOUNT
M/T: 12 x 1.25 mm
105 N-m (10.5 kg-m, 76 Ib-ft)
A/T: 10 x 1.25 mm
60 N-m (6.0 kg-m, 43 Ib-ft)
2. Install the front mount, then tighten the bolts in the
numbered sequence as shown
FRONT MOUNT
12 x 1.25 mm
77 N-m (7.7 kg-m,
56 Ib-ft)
Replace.
10 x 1.25 mm
60 N-m (6.0 kg-m, 43 Ib-ft)
CORROSION RESISTANT BOLT/NUT
3. Install the subframe, then tighten the subframe-to-
body mounting bolts (see section 20).
NOTE: Align the bolt holes of the beam brackets
and body with a tapered punch.
GUIDE HOLE
(BODY)
GUIDE HOLE
(SIDE BEAM)
TAPERED PUNCH
4. Install the transmission mount, then tighten the bolts
on the transmission side.
NOTE: Do not tighten the mounting bolt.
10 x 1.25 mm
60 N-m (6.0 kg-m,
43 Ib-ft)
MOUNTING
BOLT
TRANSMISSION
MOUNT

5. Install the side engine mount, then tighten the bolts
in the numbered sequence as shown ( – ),
12 x 1.26 mm
73 N·m (7.3 kg-m,
53 Ib-ft)
Replace.
12 x 1.25 mm
95 N·m (9.5 kg-m,
69 Ib-ft)
SIDE ENGINE
MOUNT
6. Tighten the transmission mount mounting bolt.
MOUNTING BOLT
12 x 1.25 mm
95 N·m (9.5 kg-m, 69 Ib-ft)
7. Tighten the rear mount mounting bolt.
MOUNTING BOLT
12 x 1.25 mm
77 N·m (7.7 kg-m, 56 Ib-ft)
Replace.
Check that the spring clip on the end of each
driveshaft clicks into place.
CAUTION: Use new spring clips.
Bleed air from the cooling system (see page 10-5).
Bleed air from the brake lines {see section 19).
Check the clutch pedal free play (see section 12).
Adjust the clutch guide assemblies when disas-
sembling clutch (see section 12).
Check that the transmission shifts into gear
smoothly.
Adjust the alternator belt (see section 23).
Adjust the A/C compressor belt (see section 22).
Clean battery posts and cable terminals with
sandpaper, assemble, then apply grease to pre-
vent corrosion.
Inspect for fuel leakage (see section 11).
After assembling the fuel line parts, turn on
the ignition switch (do not operate the starter)
so that the fuel pump operates for approxi-
mately two seconds and the fuel line pressu-
rizes. Repeat this operation two or three times
and check for fuel leakage at any point in the
fuel line.
Check and adjust wheel alignment (see section 18).
Refill the engine with engine oil (see page 8-4 (’91-’92
Models), (’93-Model),or (’94-’96 Models).
Refill the transmission with oil/fluid (see section
13 or 14).

Attachments

6e5549a862b3cb1612a541789231686df64a29a657754d53760ead3fdb8db80e

nsxd05004a.pdf

Variable Valve Timing and Valve Lift Electronic
Control System (VTEC)
Outline
The engine is equipped with multiple cam lobes per cylinder, providing one valve timing and lift profile at low speed and a
different profile at high speed. Switch-over from one profile to the other is controlled electronially, and is selected by
monitoring current engine speed and load.
CAM LOBES FOR LOW RPM
CAM LOBES FOR HIGH RPM
PRIMARY ROCKER ARM
MID ROCKER ARM
SECONDARY ROCKER ARM
LOST MOTION ASSEMBLY
INTAKE VALVE
EXHAUST VALVE

In general, it would be ideal if the high rpm performance of a racing engine and the low rpm performance of a standard
passenger car engine could be combined in a single engine. This would result in a maximum performance engine with a
wide power band. Two of the major differences between racing engines and standard engines are the timing of the in-
take/exhaust valves and the degree of valve lift. Racing engines have longer intake/exhaust timing and a higher valve lift
than standard engines. The Honda Variable Valve Timing and Valve Lift Electronic Control System takes this into ac-
count. When valve actuation is set for low rpm timing and lift, low rpm torque is better than in a standard engine. When
valve actuation is then switched for high rpm timing and lift, output improves to the level given by a racing engine. Until
now, few variable valve timing systems have been commercialized. In those that have, only the time that both valves are
open (intake/exhaust overlap) could be changed. Honda’s system is the first in the world in which both the valve timing
and the degree of valve lift can be changed as needed, making it the most advanced valve train mechanism available.
Valve Timing
(exhaust/intake)
Valve Lift
Racing Engine
Exhaust Intake
VTEC Engine
Low High Low
Exhaust Intake
Standard Engine
Exhaust Intake
Max. Power
Low rpm Torque
Idling Stability
TDC = Top Dead Center
Low rpm High rpm
VTEC engine
RPM switch over
point
Standard engine
rpm
BDC = Bottom Dead Center
O = Optimum Characteristic
The engine is equipped with two valve timing and valve lift settings which change according to driving conditions.

Attachments

fc288fa186cba4a1cd04631c6f5eadd434b9b91be786f554e0bfc42991cbdf5b

nsxd05019a.pdf

Engine Removal/Installation
Make sure jacks and safety stands are placed proper-
ly and hoist brackets are attached to the correct
positions on the engine (see section 1).
Make sure the car will not roll off stands and fall
while you are working under it.
3. Remove the expansion tank cap to speed draining.
Use care when removing the expan-
sion tank cap to avoid scalding by hot engine
coolant or steam.
4. Raise the hoist to full height.
5. Drain the engine coolant (see section 10).
STRUT BAR 10 x 1.25 mm
39 N.m (3.9 kg-m, 28 Ib-ft)
EXPANSION TANK
CAP
: CORROSION RESISTANT BOLT (cont’dj
1. Move the seat bottoms and backs as far forward as
they will go.
2. Disconnect the battery negative terminal first, then
the positive terminal.
Loosen the drain plug from the radiator lower
tank.
Remove two drain bolts from the water pipes
Reinstall the drain bolts with new washers.
Loosen the front and rear engine drain bolts to
drain engine coolant from cylinder heads. Con-
nect rubber hoses to the drain bolts.
6. Drain transmission oil/fluid. Reinstall the drain plug
using a new washer.
CAUTION: Do not overtighten the drain plug.
7. Drain the engine oil. Reinstall the drain plug using a
new washer.
8. Lower the hoist.
9. Remove the strut bar.
CAUTION:
Use front and rear fender covers to avoid damaging
painted surfaces.
Unspecified items are common.
Unplug the wiring connectors carefully while holding
the coupler and the connector portion to avoid
damage.
Mark all wiring and hoses to avoid mis-connection.
Also, be sure that they do not contact other wiring or
hoses or interfere with other parts.
If the ground clearance needs to be increased, use a
scissors jack and install the rubber spacers to the coil
springs (page 1-8).
Put rubber pads under the jacking points when using
jacks or safety stands to avoid damaging the body
(page 1-9 to 11).

Engine Removal/Installation
(cont’d)
10. Disconnect the resistor connector and fan motor
connector, then remove the engine room fan
assembly.
ENGINE ROOM
FAN
ENGINE ROOM
FAN CONNECTOR
GROMMET
11. Remove the rear trim panels behind the
passenger’s seat, then disconnect four connectors
from Engine Control Module (ECM) and five con-
nectors from floor wire harness.
ENGINE WIRE
HARNESS CONNECTORS
ECM
PASSENGER’S
SEAT
FLOOR WIRE HARNESS
ENGINE WIRE
HARNESS
FUEL PUMP RESISTOR
CONNECTOR
GROUND
CABLE
6×1 .0 mm
10 N.m (1.0 kg-m, 7 Ib-ft)
CORROSION RESISTANT BOLT
6 x 1.0 mm
10 N.m d.Okg.m, 7 Ib-ft)

12. Remove the intake manifold plate and the top
cover.
13. Remove the throttle cable by loosening the locknut,
then slip the cable end out of the throttle bracket
and accelerator linkage.
INTAKE MANIFOLD
TOP COVER
6 x 1.0 mm
12 N.m (1.2 kg-m, 9 Ib-ft)
PLATE
ADJUSTING NUT
LOCKNUT
CABLE END
14. Relieve fuel pressure by slowly loosening the ser-
vice bolt on the fuel filter about one turn (see sec-
tion 11).
1 5. Remove the fuel feed pipe.
16. Remove the fuel return hose from the pressure con-
trol valve.
6 x 1.0 mm
22 N.m (2.2 kg-m. 16 Ib-ft) 12 N.m (1.2 kg-m, 9 Ib-ft)
FUEL FEED
PIPE
WASHERS
Replace.
FUEL RETURN
HOSE
17. Disconnect two hoses, then remove the expansion
tank.
6 x 1.0 mm
10 N.m (1.0 kg-m, 7 Ib-ft)
EXPANSION TANK
WATER HOSES
(cont’d)
Do not smoke while working on the
fuel system. Keep open flame away from work
area. Drain fuel only into an approved container.
CAUTION:
THROTTLE CABLE
NOTE:
Take care not to bend the cable when removing
it. Always replace a kinked cable with a new
one.
Adjust the throttle cable when installing (see
section 11).
Before disconnecting any fuel line, relieve the
fuel pressure as described above.
Place a shop towel over the fuel filter to prevent
pressurized fuel from spraying over the engine.

Engine Removal/Installation
(cont’d)
18. Remove the breather pipe, then remove the air in-
take duct and the air cleaner case.
6 x 1.0 mm
10 N.m (1.0kg-m, 7 Ib-ft) AIR CLEANER
CASE
BREATHER PIPE
19. Disconnect the evaporative emission (EVAP) con-
trol canister hose from throttle body.
20. Disconnect the brake booster vacuum hose from
the intake manifold.
EVAP CONTROL CANISTER
EVAP CONTROL
CANISTER
HOSE BRAKE BOOSTER
VACUUM HOSE
21. Disconnect the two engine wire harness connec-
tors from the side wire harness at left side of
engine compartment, and remove the engine wire
harness terminal and the starter cable terminal
from the main fuse box and clamps.
22. Remove the ground cable from the transmission.
MAIN FUSE BOX
6 x 1 . 0 mm
10 N.m (1.0 kg-m,
7 Ib-ft)ENGINE WIRE
HARNESS
23. Remove the water hoses and the heater hose from
the water passage.
HEATER HOSE
WATER HOSES
: CORROSION RESISTANT BOLT

24. Disconnect the three connectors from the emission
control box.
6 x 1.0 mm
10 N.m (1.0 kg-m,
7 Ib-ft)
EMISSION CONTROL
BOX
CONNECTORS
25. Move the trunk carpet and disconnect the right rear
sensor connector. Push the wire and connector
through the body hole into the engine compart-
ment.
26. Remove the front engine mounting bolt (page
5-29).
RIGHT REAR SENSOR
CONNECTOR
27. Raise hoist to full height.
28. Remove the clutch slave cylinder from the
transmission case (M/T see section 12).
CONTROL LEVER
SHIFT CABLE
CABLE COVER
CENTER ROD
ASSEMBLY
8×1 .25 mm
22 N.m (2.2 kg-m,
16 Ib-ft)
6 x 1 . 0 mm
8 N.m (0.8 kg-m, 6 Ib-ft)
6 x 1 . 0 mm
12 N.m (1.2 kg-m. 9 Ib-ft)
UNDER GUARD
10 x 1.25 mm
60 N.m (6.0 kg-m, 43 Ib-ft)
(cont’d): CORROSION RESISTANT BOLT/NUT
Do not disconnect the vacuum hoses.
Do not disconnect the clutch hose.
29. Remove the lower cover, then remove the shift
cable and select cable with cable bracket (M/T see
section 13).
30. Remove the cover, then remove the shift cable
(A/T see section 14).
NOTE:
Take care not to bend the cable when removing
it. Always replace a kinked cable with a new
one.
Adjust the cables when installing.
31. Remove the engine under guard and the center rod
assembly.
A/T:

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 front
beam.
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.

36. Remove the rear brake hoses. Plug the brake pipes
with rubber caps.
37. Remove the wheel sensor wire clamps.
NOTE: Perform steps 38 and 39 only if the
engine/transaxle assembly is to be removed from
the subframe.
38. Remove the adjust bolt and flange bolt, then
separate the lower control arm from the subframe.
39. Remove the flange bolt, then separate the toe con-
trol arm from the subframe.
CAUTION: Make sure that the reference marks on
the control arm are aligned.
: CORROSION RESISTANT
BOLT/NUT
6 x 1.0 mm
10 N.m (1.0 kg-m, 7 Ib-ft)
DAMPER
STABILIZER
Plug the brake
pipes with
rubber caps.
FLANGE BOLT
12 x 1.25 mm
95 N.m (9.5 kg-m, 69 Ib-ft)
12 x 1.25 mm
SELF-LOCKING NUT
Replace
85 N.m (8.5 kg-m, 62 Ib-ft)
WHEEL SENSOR
WIRE CLAMP
SELF-LOCKING NUT
14 x 1.5 mm
Replace
125 N.m (12.5 kg-m. 90 Ib-ft)
12 x 1.25 mm
SELF-LOCKING NUT
Replace
95 N.m (9.5 kg-m, 69 Ib-ft)
DAMPER
6 x 1.0 mm
10 N.m (1.0 kq-m, 7 Ib-ft)
STABILIZER 6 x 1.0 mm
10 N.m (1.0 kg-m, 7 Ib-ft)
FLANGE BOLT
12 x 1.25 mm
95 N·m (9.5 kg-m,
69 Ib-ft)
12 x 1.25 mm
SELF-LOCKING NUT
Replace
85 N·m (8.5 kg-m, 62 Ib-ft)
WHEEL SENSOR
WIRE CLAMP
SELF-LOCKING NUT
14 x 1.5 mm
Replace
125 N.m (12.5 kg-m, 90 Ib-ft) (cont’d)
12 x 1.25 mm
SELF-LOCKING NUT
Replace
95 N.m (9.5 kg-m, 69 Ib-ft)

Engine Removal/Installation
(cont’d)
40. Remove the heated oxygen sensor (HO2S)
connectors.
41. Remove the self-locking nuts, then remove front
exhaust pipe and the front three way catalytic
converter.
42. Remove the self-locking nuts, then separate the
rear three way catalytic converter from rear ex-
haust pipe and the muffler.
CAUTION: Do not use an air wrench or hammer to
remove or install the exhaust system unless you
first remove the heated oxygen sensors.
NOTE: Use new gaskets and self-locking nuts
when reassembling.
NOTE: Perform steps 43 and 44 only if the
engine/transaxle assembly is to be removed from
the subframe.
SELF-LOCKING NUTS
10 x 1.25 mm
34 N.m (3.4 kg-m.
25 Ib-ft)
REAR THREE WAY
CATALYTIC
CONVERTER
GASKETS
Replace.
FRONT
EXHAUST PIPE
SELF-LOCKING NUT
10 x 1.25 mm
55 N.m (5.5 kg-m,
40 Ib-ft) DRIVESHAFT
SET RING
Replace.
6 x 1.0 mm
10 N.m (1.0 kg-m, 7 Ib-ft)
HALF SHAFT
HEAT COVER
43. Remove the half shaft heat cover.
44. Remove the driveshafts.
NOTE:
Coat all precision finished surfaces with clean
engine oil or grease.
Tie plastic bags over the driveshaft ends.

45. Install the front engine mounting bolt, torque the
nut temporarily.
46. Position the Engine Removal/Installation Fixture
(07MAK –PR7020A) under the car. Lower the car
just above the fixture. With the help of an assis-
tant, attach the fixture to the subframe with two
12 mm nuts and two 10 mm bolts.
47. Adjust the pads on the fixture to support the oil
pan and transmission housing.
48. Lower the car so the fixture is resting on its casters
(or appropriate platform).
BODY SUPPORT
BRACKET
SIDE ENGINE
MOUNT
TRANSMISSION MOUNTING
BOLT
LOOSELY INSTALL
TWO 12 mm NUTS
ON STUDS HERE
LOOSELY
INSTALL
ONE 10 mm
BOLT HERE
ENGINE REMOVAL/INSTALLATION
FIXTURE
07MAK–PR7020A (cont’d)

Engine Removal/Installation
(cont’d)
49. Remove the two bolts from the side engine mount
near the alternator. Pivot the mounting bracket into
the housing of the body.
50. Remove the transmission mounting bolt.
51. Remove the twelve subframe-to-body mounting
bolts.
52. Raise the car a few inches.
53. Check that all wires and hoses are disconnected
from the engine assembly.
54. Raise the car completely off the engine/suspension
assembly. Roll the assembly from under the car.
TRUCK
GUIDE HOLE
(BODY)
TAPERED PUNCHGUIDE HOLE
(SIDE BEAM)
NOTE: When installing, align the bolt holes of the
beam brackets and body with a tapered punch.

55. Attach a chain hoist to the engine. Remove the
front and rear mounting bolts, then separate the
engine from the suspension and the beam
assembly.
CAUTION: Do not hit the engine oil cooler on the
rear right beam bracket.
FRONT ENGINE
MOUNT
REAR ENGINE
MOUNT
56. Install the engine in the reverse order of removal:
NOTE:
Combine the front beam and the rear beam rod
assembly, then torque the four mounting bolts.
Check that the set ring on the end of each
driveshaft clicks into place.
CAUTION: Use new set rings.
(cont’d)
Align the bolt holes of the beam brackets and
body with a tapered punch (page 5-28).
Temporarily torque the two front beam nuts and
front engine mounting bolt when installing the
A/C compressor.

Attachments

3b20cd2b3395d3922c11695910b58c5702e91b42867307f0016eeaf2e0f97145

nsxb05002a.pdf

Special Tools
Ref. No. Tool Number
07MAK – PR7020A
07MAZ – SL0000A
Description
Engine Removal/Installation Fixture
NSX Fender Cover
Qty
1
1
Page Reference
5-9 (’91-’93 Models)
,or (’94-’96 Models)
5-3 (’91-’93 Models)
,or (’94-’96 Models)

Attachments

7ba8032b28935dce7d2e4cf976c6b34726fb57af466ec107c40c213e2d96faf5

nsxb05003a.pdf

Engine Removal/Installation
Removal
Make sure jacks and safety stands are placed properly
and hoist brackets are attached to the correct posi-
tions on the engine (see section 1).
• Make sure the car will not roll off stands and fall
while you are working under it.
CAUTION:
• Use a fender cover (special tool) to avoid damaging
painted surfaces.
• Unspecified items are common.
• Unplug the wiring connectors carefully while holding
the connector portion to avoid damage.
• 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.
• If the ground clearance needs to be increased, use a
scissors jack and install rubber spacers in the coil
springs (see section 1).
• Put rubber pads under the jacking points when using
jacks or safety stands to avoid damaging the body
(see section 1).
1. Move the seat bottoms and backs as far forward as
they will go.
2. Remove the rear hatch assembly and engine cover
(see section 20).
3. Disconnect the battery negative terminal first, then
the positive terminal.
4. Remove the strut brace.
COUPE:
STRUT BRACE
8 x 1.25 mm
22 N-m (2.2 kg-m,
16 Ib-ft)
NSX FENDER
COVER
07MAZ – SLOOOOA
NSX-T (open top):
8 x 1.25 mm
22 N-m (2.2 kg-m, 16 Ib-ft)
STRUT BRACE
NSX FENDER COVER
07MAZ-SLOOOOA
CORROSION RESISTANT BOLT

Engine Removal/Installation
Removal
5. Disconnect the fan motor connector, then remove
the engine room fan assembly.
ENGINE ROOM
FAN
FAN MOTOR
CONNECTOR
6 x 1.0 mm
10 N-m (1.0 kg-m, 7 Ib-ft)
6. Remove the rear trim panels behind the passenger’s
seat, then disconnect four connectors from the
engine control module (ECM) and three connectors
from the floor wire harness.
ENGINE WIRE
HARNESS
ECM
FLOOR WIRE
HARNESS
CORROSION RESISTANT BOLT
7. Disconnect the spark plug voltage detection module
connectors, ground cable and engine wire harness
clamps.
SPARK PLUG VOLTAGE
DETECTION MODULE
CONNECTORS
GROUND
CABLE
ENGINE WIRE
HARNESS CLAMPS
8. Disconnect the fuel pump resistor connector, injec-
tor resistor connector and ground cable.
FUEL PUMP RESISTOR
CONNECTOR
GROUND CABLE
INJECTOR RESISTOR
CONNECTOR

9. Relieve fuel pressure by loosening the service bolt
on the fuel filter about one turn (see section 11).
Do not smoke while working on the
fuel s y s t e m . Keep open flame away from work
area. Drain fuel only into an approved container.
10. Remove the fuel feed pipe and fuel return hose.
11. Remove the wire harness cover, then remove the
fuel pipe clamp.
22 N·m (2.2 kg-m,
16 Ib-ft) WIRE HARNESS
COVER
6 x 1.0 mm
12 N·m (1.2 kg-m,
9 lb-ft)
FUEL FEED
PIPE
WASHERS
Replace.
FUEL RETURN
HOSE
12. Remove the brake booster vacuum hose and evapo-
rative emission (EVAP) control canister hose.
BRAKE BOOSTER
VACUUM HOSE
EVAP CONTROL
CANISTER HOSE
13. Remove the expansion tank cap.
14. Raise the hoist to full height.
15. Drain the engine coolant (see page 10-5).
Loosen the drain plug from the radiator lower
tank.
Remove two drain bolls from the water pipes.
Reinstall the drain bolts with new washers.
Loosen the front and rear engine drain bolts to
drain engine coolant from the cylinder heads.
Connect rubber hoses to the drain bolts.
16. Drain the transmission oil/fluid. Reinstall the drain
plug with a new washer.
17. Drain the engine oil. Reinstall the drain plug with a
new washer.
18. Lower the hoist, then remove the air cleaner hous-
ing (see page 6-25 (’91-’93 Models),or(’95-’96 Models).
19. Disconnect two hoses, then remove the expansion
tank.
6 x 1.0 mm
10 N·m 11.0 kg-m,
7 lb-ft) EXPANSION
TANK
WATER BYPASS
HOSES
(cont’d)

Engine Removal/Installation
Removal
20. Disconnect the engine wire harness connectors.
21. Remove the battery cable from the main fuse box.
ENGINE WIRE
HARNESS CONNECTORS
BATTERY
CABLE
6 x 1.0 mm
10 N-m (1.0 kg-m,
7 Ib-ft)
22. Disconnect the throttle body 6P connector, and
remove the ground cable and starter cable.
STARTER CABLE
THROTTLE BODY
6P CONNECTOR
GROUND CABLE
CORROSION RESISTANT BOLT
23. Disconnect the two connectors from the emission
control box, then remove the control box.
• Do not disconnect the vacuum hoses.
6 x 1.0 mm
10 N-m (1.0 kg-m, 7 Ib-ft)
CONNECTORS
CONTROL BOX
24. Remove the radiator hoses and heater hose.
HEATER HOSE
RADIATOR
HOSES

25. Loosen the idler pulley center nut and adjusting nut,
then remove the air conditioning (A/C) compressor
belt.
ADJUSTING
NUT
A/C COMPRESSOR
BELT
IDLER PULLEY
CENTER NUT
45 N-m (4.5 kg-m,
33 Ib-ft)
26. Move the trunk carpet, and disconnect the right rear
wheel sensor connector. Push the wire and connec-
tor through the body hole into the engine compart-
ment.
RIGHT REAR SENSOR
CONNECTOR
27. Raise the hoist to full height.
28. Remove the slave cylinder (M/T see section 12).
• Do not disconnect the clutch hose.
29. Remove the lower cover, then remove the shift
cable and select cable (M/T see section 13).
30. Remove the cable cover, then remove the shift
cable (A/T).
NOTE:
• Take care not to bend the cable when removing
it. Always replace a kinked cable with a new one.
• Adjust the cable when installing.
31. Remove the engine under guard and the center rod
assembly.
A/T:
CONTROL LEVER
CENTER ROD
ASSEMBLY
8 x 1.25 mm
22 N-m (2.2 kg-m,
16 Ib-ft)
6 x 1.0 mm
8 N-m (0.8 kg-m, 6 Ib-ft)
6 x 1.0 mm
12 N-m (1.2 kg-m, 9 Ib-ft)
UNDER GUARD
10 x 1.25 mm
60 N-m (6.0 kg-m, 43 Ib-ft)
SHIFT CABLE
CABLE COVER

Engine Removal/Installation
Removal
32. Remove the left and right parking brake cables (see
section 19).
33. Remove the rear beam rod assembly and parking
brake cable clamps. ‘
10 x 1.25 mm
60 N-m (6.0 kg-m,
43 Ib-ft)
12 x 1.25 mm
95 N-m (9.5 kg-m,
69 Ib-ft)
34. Remove the front engine mount, then remove the
front beam.
12 x 1.25 mm
77 N-m (7.7 kg-m, 56 Ib-ft)
Replace.
12 x 1.25 mm-
95 N-m (9.5 kg-m,
69 Ib-ft)
CORROSION RESISTANT BOLT/NUT
35. Remove the A/C compressor (see section 22), then
suspend it from the body.
NOTE:
• Do not remove the compressor hoses.
• Do not let the compressor hang by its hoses.
36. Reinstall the front beam and front engine mount.
Hang with wire
or rope.
A/C COMPRESSOR
37. Remove the rear brake hoses, then plug the brake
pipes with rubber caps (see section 19).
38. Disconnect the left rear wheel sensor connector,
then remove the wheel sensor wire clamps and sta-
bilizer link.
6 x 1.0 mm
10 N-m (1.0 kg-m,
7 Ib-ft)
LEFT REAR
WHEEL SENSOR
CONNECTOR
SELF-LOCKING NUT
12 x 1.25 mm
95 N-m (9.5 kg-m,
69 Ib-ft)
Replace.
STABILIZER
LINK SELF-LOCKING NUT12 x 1.25 mm
85 N-m (8.5 kg-m, 62 Ib-ft)
Replace.
REAR BEAM
ROD ASSEMBLY

39. Remove the right wheel sensor wire clamps and
stabilizer link.
6 x 1.0 mm
10 N-m (1.0 kg-m,
7 Ib-ft)
STABILIZER
LINK
SELF-LOCKING NUT
12 x 1.25 mm
95 N-m (9.5 kg-m,
69 Ib-ft)
Replace.
SELF-LOCKING NUT
12 x 1.25 mm
85 N-m (8.5 kg-m, 62 Ib-ft)
Replace.
40. Disconnect the front secondary heated oxygen sensor
connector, then remove the front exhaust pipe A and
front three way catalytic converter (TWC).
41. Separate the rear TWC from the rear joint pipe.
SELF-LOCKING NUTS
10 x 1.25 mm
34 N-m (3.4 kg-m, 25 Ib-ft)
Replace.
GASKETS
Replace.
GASKET
Replace. SELF-LOCKING NUT •
10 x 1.25 mm
55 N-m (5.5 kg-m, 40 Ib-ft)
Replace.
42. Position the special tool under the car. Lower the car
just above the fixture. With the help of an assistant,
attach the fixture to the subframe with two 12 mm
nuts and two 10 mm bolts.
LOOSELY INSTALL TWO 12 mm
NUTS ON STUDS HERE
ENGINE REMOVAL/
INSTALLATION
FIXTURE
07MAK-PR7020A
LOOSELY INSTALL ONE
10 mm BOLT HERE
43. Adjust the pads on the fixture to support the oil pan
and transmission housing.
44. Lower the car so the fixture is resting on its casters
(or appropriate platform).
45. Remove the two bolts from the side engine mount
near the alternator. Pivot the mounting bracket into
the housing of the body.
BODY SUPPORT
BRACKET
SIDE ENGINE
MOUNT

Engine Removal/Installation
Removal
46. Remove the transmission mounting bolt.
MOUNTING BOLT
TRANSMISSION
MOUNT
47. Remove the twelve subframe-to-body mounting
bolts.
48. Raise the car a few inches.
49. Check that all wires and hoses are disconnected
from the engine assembly.
50. Raise the car completely off the engine/suspension
assembly. Roll the assembly from under the car.
NOTE: Perform steps 51 thru 54 only if the engine
assembly is to be removed from the subframe.
51. Remove the adjusting bolt and flange bolt, then
separate the lower control arm from the subframe
(see section 18).
52. Remove the flange bolt, then separate the toe control
arm from the subframe (see section 18).
CAUTION: Make sure that the reference marks on
the control arm are aligned.
53. Remove the heat shield form the intermediate shaft
bearing support, then remove the driveshafts (see
section 16).
NOTE:
• Coat all precision finished surfaces with clean
engine oil.
• Tie plastic bags over the driveshaft ends.
54. Attach a chain hoist to the engine.
Remove the front and rear mount mounting bolts,
then separate the engine from the suspension and
the beam assembly.
CAUTION: Do not hit the engine oil cooler on the
rear right beam bracket.
FRONT MOUNT
REAR MOUNT

Attachments

4feba62648b7d77effaf145095ead197ce8abe5cdf0188cf87f6979caf0c4449

nsxd05014a.pdf

Cooling
Cooling System
Two cooling systems are employed:
An antifreeze/water system with the radiator mounted in the front of the vehicle.
An air-cooling system driven by a fan mounted in the engine compartment.
BLEEDER
RADIATOR
BLEEDER
WATER VALVE
HEATER CORE
DRAIN
DRAINS
BLEEDER
ENGINE DRAIN
WATER PUMP
ENGINE OIL
COOLER
ENGINE DRAIN
FAST IDLE THERMO VALVE
IDLE AIR CONTROL (IAC) VALVE
BREATHER PIPETHROTTLE
BODY
THERMOSTAT
TEMPERATURE SWITCH
ENGINE COOLANT
BLEEDER
EXPANSION
TANK

Attachments

19594366baee8113c88d4b998305f164729934cc5a3903de75e6057d7e90d336

nsxd05018a.pdf

Special Tools
Ref. No. Tool Number
07MAK-PR7020A
Description
Engine Removal/Installation Fixture
Qty
1
Page Reference
5-27
Main Menu Table of Contents
Special Tools
Ref. No. Tool Number Description ł Qty Page Reference
® 07MAK—PR7020A Engine Removal/Installation Fixture 1 5-27
5-18

Attachments

67916a179e16e298911e06228e6a5d27922b41dd3c3074cbbe2de1950635d708

nsxd05029a.pdf

55. Attach a chain hoist to the engine. Remove the
front and rear mounting bolts, then separate the
engine from the suspension and the beam
assembly.
CAUTION: Do not hit the engine oil cooler on the
rear right beam bracket.
FRONT ENGINE
MOUNT
REAR ENGINE
MOUNT
56. Install the engine in the reverse order of removal:
NOTE:
Combine the front beam and the rear beam rod
assembly, then torque the four mounting bolts.
Check that the set ring on the end of each
driveshaft clicks into place.
CAUTION: Use new set rings.
(cont’d)
Align the bolt holes of the beam brackets and
body with a tapered punch (page 5-28).
Temporarily torque the two front beam nuts and
front engine mounting bolt when installing the
A/C compressor.

Engine Removal/Installation
(cont’d)
Torque the engine mounting bolts in sequence
shown below.
CAUTION: Failure to tighten the bolts in the proper
sequence can cause excessive noise and vibration
and reduce bushing life; check that the bushings
are not twisted or offset.
Bleed air from the cooling system (see section 10)
Bleed air from the brake lines (see section 19)
Adjust the throttle cable tension.
Check the clutch pedal free play.
Adjust the clutch guide assemblies when
disassembling clutch (see section 12).
Check that the transmission shifts into gear
smoothly (M/T see section 13, A/T see section 14).
Adjust the alternator belt (see section 23).
Adjust the A/C belt (see section 22).
Clean battery posts and cable terminals with sand-
paper, assemble, then apply grease to prevent
corrosion.
Inspect for fuel leakage:
• After assembling fuel line parts, turn on the igni-
tion switch (do not operate the starter) so that
the fuel pump operates for approximately two
seconds and the fuel line pressurizes. Repeat
this operation two or three times and check
whether any fuel leakage has occurred at any
point in the fuel line.
Check and adjust wheel alignment.
10 x 1.25 mm
60 N.m (6.0 kg-m, 43 Ib-ft)
MOUNTING BOLT
SPECIAL BOLT
12 x 1.25 mm
77 N.m (7.7 kg-m,
56 Ib-ft)
Replace.
10 x 1.25 mm
60 N.m (6.0 kg-m
43 Ib-ft)
73 N.m (7.3 kg-m, 53 Ib-ft)
12 x 1.25 mm
95 N.m (9.5 kg-m,
69 Ib-ft)
RUBBER CAP
(M/T only)
SIDE MOUNT
: CORROSION RESISTANT
BOLT/NUT
12 x 1.25 mm
105 N.m (10.5 kg-m, 76 Ib-ft)
10 x 1.25 mm
60 N.m (6.0 kg-m, 43 Ib-ft)
MOUNTING BOLT
FRONT MOUNT
TRANSMISSION
MOUNT (A/T)
12 x 1.25 mm
95 N.m (9.5 kg-m,
69 Ib-ft)
SEAT STOPPER
TRANSMISSION
MOUNT (A/T)
REAR MOUNT
SPECIAL NUT
12 x 1.25 mm
77 N.m (7.7 kg-m,
56 Ib-ft)
Replace.
M/T:
A/T:
After the engine is in place:

Additional Torque Value Specifications:
NOTE: For manifold replacement, refer to section 9.
ENGINE HANGER
8 x 1.25 mm
30 N.m (3.0 kg-m,
22 Ib-ft)
A/T TRANSMISSION HANGERS
8 x 1.25 mm
30 N.m
(3.0 kg-m,
22 Ib-ft)
M/T TRANSMISSION
HANGERS
12 x 1.25 mm
75 N.m (7.5 kg-m, 54 Ib-ft) 6 x 1.0 mm
10 N.m (1.0 kg-m, 7 Ib-ft)
8 x 1.25 mm
22 N.m (2.2 kg-m,
16 Ib-ft)
HALF SHAFT
SUPPORT BASE
(cont’d)
HALF SHAFT
HEAT COVER
8 x 1.25 mm
22 N.m (2.2 kg-m,
16 Ib-ft)
A/C BRACKET
HALF SHAFT
10 x 1.25 mm
45 N.m (4.5 kg-m,
33 Ib-ft)
ALTERNATOR
BRACKET
STIFFENER
8 x 1.25 mm
22 N.m (2.2 kg-m,
16 Ib-ft)
8x 1.25 mm
22 N.m (2.2 kg-m,
16 Ib-ft)
10 x 1.25 mm
45 N.m (4.5 kg-m,
33 Ib-ft)
ALTERNATOR
BRACKET
8 x 1.25 mm
22 N.m (2.2 kg-m,
16 Ib-ft)

Engine Removal/Installation
(cont’d)
Sub-frame Torque Value Specifications:
RIGHT REAR
BRACKET 10 x 1.25 mm
60 N.m (6.0 kg-m.
43 Ib-ft)
LEFT REAR
BRACKET
10 x 1.25 mm
60 N.m (6.0 kg-m
43 Ib-ft)
10 x 1.25mm
60 N.m (6.0 kg-m, 43 Ib-ft)
CORROSION RESISTANT BOLT/NUT
12 x 1.25 mm
95 N.m (9.5 kg-m, 69 Ib-ft)
10 x 1.25 mm
60 N.m (6.0 kg-m, 43 Ib-ft)
ROD A10 x 1.25 mm
60 N.m (6.0 kg-m,
43 Ib-ft)
FRONT BEAM
REAR BEAM
12 x 1.25 mm
95 N.m
(9.5 kg-m,
69 Ib-ft)
ROD B
10 x 1.25 mm
60 N.m (6.0 kg-m, 43 Ib-ft)
CENTER ROD

Attachments