spark plugs HONDA CIVIC 1991 Owners Manual

Spark Plugs
Spark plugs should be replaced every 24 months or 30,000 miles (48,000 km), whichever comes first.

Recommended spark plugs:

CAUTION:
Never use spark plugs with an improper heat range; they will adversely affect engine performance and durability.
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 plug cap, then remove and discard the old plug.
3. Check the gap of the new spark plug 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 the
cylinder head. PLUG CAPProCarManuals.comMain Menu s t

Catalytic Converter

A catalytic converter is installed in the exhaust system to help
clean-up the harmful exhaust gases that can cause air pollution.
To be effective, the converter must work at high temperature, so don't park your car over dry grass, leaves or anything else that

could burn easily.

To stay effective, the converter must not be contaminated by

leaded gasoline; use only unleaded gas as explained on page 54.

CAUTION:
The converter can be overheated and damaged if it's fed too much
unburned fuel mixture from the engine, so:
— Don't push or tow the car to start it; if the battery is dead, jump start the car as shown on page 110.
— Don't turn the key off while the engine is running above idle
speed.

— Don't change the ignition timing, or remove any emission control
parts.

— Use only the spark plugs specified in this manual. — Don't keep driving your car if it isn't running properly, or if its CHARGE warning light comes on; have it checked by your
Honda dealer.
CATALYTIC CONVERTERProCarManuals.comMain Menu s t

Maintenance
Non-Scheduled MaintenanceRecord................................... 72
Scheduled Maintenance Record................................... 71

Schedule................................... 68

Severe Driving Conditions...... 72
Manual Transmission Clutch Pedal Adjustment........ 61
Maximum Allowable Speeds.. 63
Oil...............................................
78

Recommended Shift
Speeds.. 62

Shifting......................................

61

Meters, Gauges..........
See "Gauges"
Mirrors Power Mirrors.......................... 35

Rearview Mirrors..................... 35

Octane Rating, Gasoline. See "Fuel"
Odometer........................................ 28
Oil
Engine Oil.................................. 75

Fluid Locations......................... 74
Oil Pressure Warning Light..... 30
Power Steering Fluid................ 85
Transmission Oil/Fluid.............. 78
Operation In Foreign Countries..... 55
Panel Brightness Control............... 37
Parking Brake................................. 42
Passive Belt.................................... 10
PGM-FI
System.................................... 125
Power Door Locks................................. 4
Mirrors...................................... 35
Steering..................................... 85

Windows.................................. 43

Pregnant Women........................... 25
Pressures, Tire Inflation................ 94
Preventive Service...................... 102 Radiator Coolant............................ 80

Rear Seat.......................................... 8

Rearview Mirrors........................... 35
Rear Window Defogger................ 34Rear Window Wiper...................... 34Reminder Lights .................. See "Warning Lights"
Replacement
Air Filter.................................... 86

Bulb............................................ 92
Engine Oil.................................. 76

Fuel Filter.................................. 86

Fuse...........................................90
Oil Filter..................................... 76
Radiator Coolant...................... 82
Spark Plugs............................... 87

Tire............................................ 94
Wiper Blades............................. 88
Rust Prevention........................... 101
Safety Defects, Reporting.......... 128

Safety Items................................... 59

Seats
Adjustment................................. 6
Head Restraints.......................... 7
Seat Belt Reminder Light
and Beeper (Sedan).................. 14

Seat Belt Reminder Light and Beeper (Hatchback).......... 17
Seat Belts Anchor Points (Hatchback)..... 22
Anchor Points (Sedan)............ 24

Automatic Belt......................... 10

Buckling the Front Seat Belts (Sedan)............... 11
Buckling the Front Seat Belts (Hatchback)....... 15
Buckling the Rear Seat Belts .. 19
Child Restraint.......................... 21
Cleaning..................................... 25

Fasten Seat Belt Reminder Light and Beeper (Sedan).............. 14
Fasten Seat Belt Reminder Light and Beeper (Hatchback)...... 17

(cont'd)

Numbers, Identification............... 121ProCarManuals.comMain Menu s t

Index (cont'd)

Inspection................................. 25

Passive Belt.............................. 10
Pregnant Women..................... 25
Rear Center Seat Belt.............. 20
Replacement............................. 25 Shoulder Belt Buckle............. 113

Seats
Front Seat................................... 6
Head Restraints.......................... 7

Rear Seat.................................... 8

Shifting
Automatic................................ 64

Manual....................................... 61

Spare Tire Changing a Flat Tire............... 106
COMPACT Spara Tire........... 104
Spark Plugs Replacement............................. 87
Specifications (Hatchback) ..116Specifications (Sedan).......... 119
Speedometer.................................. 28
Starting the Engine......................... 58
Steering Anti-theft Column Lock .......... 57Power Steering......................... 85

Tilt Steering.............................. 32

Stuck Car..................................... 112

Sunroof........................................... 52
If the Sunroof Won't Close..... 53
Maintenance............................. 53
Operation.................................. 52

Sunshade.................................. 52

Tachometer.................................... 28
Temperature Gauge, Coolant....... 28 Tilt Steering.................................... 32
Tire Air Pressure............................. 94
Balancing................................... 97

Chains....................................... 95

Changing a Flat Tire............... 106COMPACT Spare.................. 104
DOT Tire Quality Grades....... 122
Inflation Pressures................... 94 Requirement............................. 96
Rotation.................................... 97
Snow Tire................................. 95
Spare Tire............................... 104
Specification (Hatchback).... 116 Specification (Sedan)............ 119
Tools............................................. 105
Towing.......................................... 111

Transmission
Capacity.................................... 79
Identification Number............ 121

Oil/Fluid..................................... 78

Shifting the Automatic............ 64

Shifting the Manual.................. 61
Transmission............................ 78
Treadwear.................................... 122

Trip Meter....................................... 28
Trunk Access From Rear Seat....... 8

Trunk Lid........................................... 5

Turn Signals.................................... 36
Warning Lights............................... 29
Warranty Service........................ 127Washer Rear Window Washer............. 34Reservoir Capacity.................. 33
Windshield Washer.................. 33
Washing........................................ 100

Waxing......................................... 101

Windows
Appearance Care................... 100
Power Windows...................... 43

Windshield Defogger..................... 51 Windshield Washer....................... 33
Windshield Wipers........................ 33
Wiper Blades ..................................
88
Wipers Rear Windo
w Wiper................ 34
Windshield Wipers................... 33
Vehicle Identification Number.... 121
Ventilation...................................... 45ProCarManuals.comMain Menu s t