1990 HONDA PRELUDE spark plugs replace

Spark Plugs

Spark plugs should be replaced every 24 months or 30,000 miles
(48,000 km), whichever comes first.
Recommended spark plugs: (2.0S)
For all normal driving

BCPR5EY-N11 (NGK) BCPR5E-11 (NGK)

Q16PR-U11 (ND)

For hot climates or continuous high speed driving
BCPR6EY-N11 (NGK) BCPR6E-11 (NGK)
BCPR7EY-N11 (NGK) BCPR7E-11 (NGK)

Q20PR-U11 (ND) Q22PR-U11 (ND)

(2.0Si,Si)
For all normal driving

ZFR5F-11 (NGK) KJ16CR-L11 (ND)
For hot climates or continuous high speed driving ZFR6F-11 (NGK) KJ20CR-L11 (ND)
Keep hands away from the radiator fan. The fan may start
automatically without warning and run for up to 15 minutes, even
after the engine is turned off.
CAUTION:
Never use spark plugs with an improper heat range; they will
adversely affect engine performance and durability.ProCarManuals.comMain Menu t s

Spark Plug Replacement

Replace plugs one at a time, so you don't get the wires mixed up. 1. Clean any dirt from around the spark plug base.
2. Disconnect the spark plug cap, then remove and discard the old
plug.

3. Check the gap of the new spark plugs before installation.
Plug gap should be:

1.1 mm (0.04 in)

4. Thread the new spark plug in by hand to prevent cross-threading.
5. After the plug seats against the cylinder head, tighten 1/2 turn with a spark plug wrench to compress the washer.
6. Reinstall the spark plug cap.
CAUTION:
The spark plugs must be securely tightened, but not overtightened.A plug that's too loose can get very hot and possibly damage the
engine; one that's too tight could damage the threads in thecylinder head.
PLUG CAPProCarManuals.comMain Menu t s

Index (cont'd)

Replacement

Air Filter .....................................94
Bulbs........................................ 103

Engine Oil ...................................84

Fuel Filter ...................................96
Fuses .......................................101Oil Filter
......................................84

Radiator Coolant .......................90
Spark Plugs...............................92

Tires.........................................107
Wiper Blades .............................93Retractable Headlights I
f the Retractable Headlights
do not operate ...................123
Rust Prevention.........................111
Safety Items ...................................63
Seat Belt Reminder Light and
Beeper ..................................... .21

Seat Belts
Anchor Points ...........................16
Buckling the FrontSeat Belts .............................10
Buckling the Rear Seat Belts............................12
Child Restraint......................14

Cleaning .....................................17

Warning Light and Warning Beeper ...................13
Inspection ..................................17
Lap/Shoulder Belts ...................10
Pregnant Women ......................16
Reminder Light ..........................20
Replacement .............................17
Seats
Driver's Lumbar Support ...........7
Driver's Side Support..............7
Front Seat ....................................5

Head Restraints ...........................8

Shift Lever Position Indicator........20
Shifting

Automatic..................................67
5-Speed......................................65

Spare Tire

Changing a Flat Tire................116

COMPACT Spare Tire ...........114
Specifications .........................125
Spark Plugs...................................92
Specifications...............................125Speedometer ..................................
20

Starting the Engine .........................61

Steering Anti-theft Column Lock ...........
58Four Wheel Steering............59
Power Steerin g
.........................97
Tilt Steering ........................26
Stereo Sound System
Operation...................................47

Stuck Car ..............................122
Sunroof

If the Sunroof Won't

Close .....................................54

Maintenance...........................54
Operation ........................ 53

Sunshade.......................................
53

Tachometer.............................20

Temperature Gauge
,
Coolant

....................................................20

Thermostat...................................90
Tilt Steering.....................................26
Tire
Air Pressure ............................105

Balancing ................................106

Chains...................................106
Changing a Fla
t Tire................118

COMPACT Spare .................114
DOT Tir
e
Quality Grades........128
Inflation Pressures ..................105

Requirement ..................................128

Rotation ...................................
106

Snow Tires ........................ 105

Spare Tire................................114

Specification ....................... .
126

To Get In/Out of Rear Seat..............6
Tools ..............................................
116

Towing...........................................121
Towing a Traile
r ..............................
71
Transmission

Identification
Number............127

Oil/Fluid......................................86

Shifting the Automatic.............67

Shifting the Manual...................65

Capacity ...................................125ProCarManuals.comMain Menu t s