2003 HONDA CIVIC spark plugs

Maintenance Schedule
Listed by Distance/Time for Normal Conditions
This two page l/lanitenance Schedule outlines the minimun required maintenance. Service at the indicated distance or time, whichever comesfirst. use the lvlaintenance Schedule for Severe conditions if the vehicle meets any of the qualifiers in the Severe Conditions schedule or if thevehicle is normally driven in Canada.
Inspect valve clearance. (cold) (see page 6-321r Intake: 0.21-0.25 mm (0.008 0.010 in.) Exhaust: 0.28 0.32 mm (0.011 0.013 in.)Replace spark plugs. Use IZFR6K'11 (NGK) or SKJ20DR-M11 (DENSO).1.0 1.1 mm
! Do items in A,B, alqq.,
120,000 mi/ 192,000 km/ 6 yearsI Replace transmission fluid.Use Honda MTF (see page 13-3).
/ / Y vcdrs120,000 mil 192,000Beplace coolant (see page 10 6). Capacity: 5.0 0 (5.3 US qt). Use Honda All Season Antifreeze/Coolant Type 2.
According to state and lederal regulations, tailure to do the maintenance items marked with an asterisk {*) will not void the customer'semissions warranties, However, Honda recommends that all maintenance services be done at the recommended interval to ensure long-termreliability.
I
3-4

Maintenance Schedule
Listed by Distance/Time for Severe Conditions
Service at the indicated distance or time, whichever comes first. Use this schedule if the vehicle is driven MAINLY in Canada or in any of thetollowing conditions; il only OCCASIONALLY driven in these conditions, use the Normal Conditions schedule (see page 3-4).Severe Driving Conditions. Driving less than 5 miles {8 km) per trip or, in freezing temperatures, driving less than 10 miles (16 km) per trip. Driving in extremely hot (over 90"F/32"C) conditions. Extensive idl;ng or long periods of stop and go driving, such as a taxi or a commercial delivery vehicle.. Trailer towing, driving with a car-top carrier, or driving in mountainous conditions.. Driving on muddy, dusty, or de'iced roads
Replace transmission fluid. Use Honda MTF {see page 13 3).
Inspect valve clearance. (cold) (see page 6 32): lntake: 0.21 0.25 mm (0.008 0.010 in.) Exhaust: 0.28 0.32 mm (0.011 0.013 in.)Replace spark plugs.Use IZFR6K 1 1 (N GK) or SKJ20DR'M 1 1 {DENSO)
km/ 6 yearsReplace transmission fluid. Use Honda MTF (see page 13 3).
mil 192,000 km/ 10 years, then every 60,000 mi/ 96,000 km/ 5 yearsReplace coolant (see page 10-6). Capacity: 5.0 015.3 US qt) Use Honda All Season Antifreeze/coo lant Type 2.
3-6

Maintenance Schedule
Service atthe indicated distance ortime,whichever comes first.miles x 1,000t020304050708090 100110r20
km x 1,000163248648096112128144 160192
months12243486012
Replace engine oilooooaooaaoOa
Rotate tires{Check tire intlation and condition at least once per month)
Replace engine oil filterooaaaa
Inspect front and rear brakes
Check parking brake adjustment
Visually inspect the following items:. Tie-rod ends, steering gearbox and boots. Suspension components. Driveshaft boots. Brake hoses and lines (including ABSi. Allfluid levels and condition of{luids. Exhaust system*. Fuel lines and connections*
Inspect and adjust drive beltaaaa
Replace dust and pollen filter
Reolace transmission fluid
Servicethe following items at the recommended intervals
a
Replace air cleaner elementEvery 30,000 miles (48,000 km)
Replace spark plugsEvery 110,000 miles (176,000 Lm)
Inspect valve clearanceInspect every 110,000 miles {176,000 km), otherwise adiusl only if noisy.
Inspect idle speed*Every 160.000 mr es 1256,000 km) or 8 years
Replace engine coolantAt 120,000 miles (192,000 km) or 10 years, then every 60,000 miles (96,000 km) or 5
Replace brake fluidEvery 3 years
Listed by Maintenance ltem for Normal Conditions
Follow the Normal Schedule if the severe driving conditions specified in the lMaintenance Schedule for Severe Conditions on the next page do
not apply, and if only OCCASIONALLY driven in severe driving conditions.Follow the Severe Conditions schedule if the vehicle is driven MAINLY in Canada.
* : According to state and lederal regulations, failure to do the maintenance items marked with asterisk (*) will not void customer's emissions
warranties. However, Honda recommends that all maintenance service be done at the recommended interval to ensure long-term reliability-
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3-8

Listed by Maintenance ltem for Severe Conditions
Use this schedule if the vehicle is driven MAINLY in Canada or in anv of the followina conditions.NOTE: it only OCCASIONALLY driven in theseconditions, use the Normal Conditions schedute.Sovere Driving Conditions. Driving less than 5 miles (8 km) per trip or, in lreezing temperatures, driving less than. Driving in extremely hot over 90 "F 132 'C)conditions.10 miles (16 km) per trip.
. Extensive idling, or long periods ot stop-and-go-driving, such as a taxi or a commercial delivery vehicle.. Trailer towing, driving with a cartop carrier, or driving in mountainous conditions.. Driving on muddy, dusty, or de iced roads.
Service at the indicated distance or time,whichever comes first.miles x 1,000102030405060708090100110120
km x 1,0001648648096112128144160176192
months122436486072
Replace engine oilReplace every 5,000 miies 18,000 km)or 6 months
Rotate tires{Checktire intlation and condition at leastonce per monthiaoaaoaaoaaao
Replace engine oil fiher
Inspect front and rear brakes
Lubricate all locks, hinges, and latches
Visually inspect the following items:. Tie rod ends, steering gearbox and boots. Suspension components' Driveshaft boots
Checl parking brale adjuslmentaaOaoa
Visually inspect the following items:. Brake hoses and lines {including ABSi. Allfluid levels and condition oflluids. Exhaust system*. Fuel lines and connections*. Lights and controls, vehicle underbody
Inspect and adjust drive behoaoa
Replace dust and pollen filter"o't'
Replace transmission lluidaa
Service the following items atthe recommended interuals
Replace air cleaner elementEvery 15,000 miies (24,000 km) in dusty conditions, otheMise use normal schedule.
Replace spark plugsEvery 110,000 miles (176,000 km)
Inspect valve clearanceInspect every 110,000 miles (176,000 km), otheMise adiust only if noisy.
Inspect idle speed'Every 160,000 miles (256,000 km)or8 vears
Replace engine coolantAt 120,000 miles (192,000 km) of 10 years,lhen every 60,000 miles (96,000 km)or 5
Replace brake fluidEvery 3 years
* : According to state and federal regulations, failure to do the maintenance items marked with asterisk 1*)will not void customer's emissionswarranties. However, Honda recommends that all maintenance service be done at the recommended interval to ensure long{erm reliabilitv.
NOTE 1: Replace the dust and pollen filter at 15,000 miles/24,000 km if the vehicle is driven mostly in urban areas that have high concentrationsof soot in the air from industrv and diesel-Dowered vehicles.
t,
3-9

Spark Plug Inspection
1.Inspect the electrodes and ceramic insulator.
Burned or worn electrodes may be caused by:. Advanced ignition timing. Loose spark plug
. Plug heat range too hot.Insufficientcooling
Fouled plug may be caused by:. Retarded ignition timing. Oil in combustion chamber. Incorrect spark plug gap
. Plug heat range too cold. Excessive idling/low speed running. Clogged air cleaner element. Deteriorated ignition coils
Worn or deformedelectrodes
Do not adjust the gap of iridium tip plugs (A);
replace the spark plug if the gap is out of
specification.
Electrode Gap:
Standard (New): 1.0 1.1 mm
{0.039-0.0€ in.)
Service Limit: 1.3 mm {0.051 in.l
f .lmproper gap
I J.Oil-toulingr- 1 . Cs6on deposits' I . Cracked center electrode insulator
L
3. Replace the plug at the specified interval, or if the
center electrode is rounded {A). Use onlV the spark
plugs listed below.
Spark Plugs: lZFR6Kl1 (NGK)
SKJ2ODR-M11 (DENSO)
Apply a small quantity of anti-seize compound to
the plug threads, and screw the plugs into the
cylinder head finger-tight. Then torque them to
18 N m (1.8 kgf.m, 13lbf ft).
4.
4-19

Cylinder Head
Engine Compression Inspection
1. Warm up the engine to normal operating
temperature (cooling fan comes on).
2. Turn the ignition switch OFF.
3. Remove the intake manifold cover (see step 1 onpage 6-22).
4, Disconnect all four injector connectors.
5. Start the engine, and let it run until it stalls.
6. Remove the iour ignition coils (see page 4-18).
7. Remove the four spark plugs.
8. Attach the compression gauge to the spark plug
note.
6-6
V,
\
9.
10.
Open the throttle fully, then crank the engine with
the starter motor and measure the compression.
Compression Pressure
Above 930 kpa (9.5 kgf/cm', 135 psi)
Measure the compression on the remaining
cylinders,
Maximum vadation
Within 200 kPa (2.0 kgf/cm', 28 psi)
lf the compression is not within specifications,
check these items, then remeasure the
compressron.
. Damaged orworn valves and seats. Damaged cylinder head gasket. Damaged or worn piston rings. Damaged orworn piston and cylinder bore
11.
\-

ldle Control System
ldle Speed lnspection
NOTE:' Leave the idle air control (lAC) valve connecled.. Before checking the idle speed, check these items:- The malfunction indicator lamp (MlL) has not been
reported on.- lgnition timing- Spark plugs- Air cleaner- PCV system. Pullthe parking brake lever up. Start the engine, and
make sure the headlights are off.
1. Disconnect the evaporative emission (EVAP)
canister purge valve 2P connector.
2. Connect a tachometer (A)to the test tachometer
connector (B), or connect the Honda PGM Tester (C)
or an OBD ll scan tool to the data link connector(DLC) (D) located under the driver's side of the
dashboard.
11-138
4.
3.
5.
6.
Start the engine. Hold the engine at 3,000 rpm with
no load (in neutral) until the radiator fan comes on,
then let it idle.
Check the idle speed with no-load conditions;
headlights, blower fan, radiator fan, and air
conditioner off.
ldle speed should be: 750 t 50 rpm
Let the engine idle for 1 minute with the heater fan
switch on Hl and air conditioner on, then check the
idle speed.
ldle speed should be: 750 t 50 rpm
NOTE: lf the idle speed is not wilhin specification,
go to the Symptom Troubleshooting Index,
Reconnect the EVAP canister purge valve 2P
connector.

Service Manual lndex
(cont'dl
Power Window Switch, Passenger'slnput Test .............-......
Replacement...,-.-.-...,..
Radialor Cap
Rocker Arm AssemblyRemovalD;sassembly/Reassembly
Specifications6-26 (See section 2)22-13022 13222-133..................... 6-27
ComponentLocation Index ..............22 124Circuit Dia9ram .................. ............... 22 125
Ouaner Window Glass8ep1acement ......................................... 20-29
lnstallation6-38
Rocker ArmsTestInspecton6-28
Roof MoldingsReplacement
Seat BeltsComponent Location Index ................... 23-3
Seat 8ehs, FrontReplacementrnspec!on
sRsComponent Location Index ................. 23-13Description ....................................... 23-31Circuit D;agram ... .... ...........2334lnspection/Replacemenl ................... 23 1 126-7
SRS lndicator CircuilTroubleshooting
Startel
Stabilizer BarReplacementFront SuspensionRear Suspension
Stabilizer LinksRemoval/lnstallationFront SuspensionRear Suspension
23 105oSRS UnitReplacement..-.................................... 23-122s
R
1A-1718-30
18 1818-31RadiatorTest......23-9
23-1Replacement ...........
Radiator and Condenser FansCommon CircuitTroubleshooling......... ..... .........21 29
10-310-10Seat Behs, RearReplacement
Seat Cover, FrontReplacement
Seat Cushion Cover, R6ar10-3Replacement
ReplacementTest
Test
20-75
20-84
Overhaul
Starter SolenoidTest..-.-...4-7
Radiator Fan AssemblyTestSeat, Driver'sRemovaf/lnstaf lation ............................ 20 1 1Disassembly/Reassemb1y ................... 20-73
Sedt, Faont Passenger'sDisassembly/Reassemb1y ................... 20-74
Seat, RearRemoval/lnstallation ............................ 20-80
Seat-back Cover, Reer
Starting SystemComponent Location Index...............-..... 4-3CircuitDia9ram ........................................ 4 4
\'{........................ r0-4
Radiator Fan CircuitTroubleshooting
Radiator Fan SwhchReplacementTest
Radiator Fan Switch CircuitTroubleshooting
Rear Air OutletReplacement
Circuil DiagramTest
Rear Window D€rogger WiresRepair
RearWindow GlassReplacement
Troubleshooting10-14
10-1710-17
10 16
17 -3
11-4
17-9
SteeringComponent Location Index................-..Inspectaon ...................
Steering ColumnRemoval/lnstallationReplacementInspection11 11
17-5117 5517 63
20 68
Seat-back Latch, ReaI2Q-104Replacement
Seat-back Striker. RearReplacement
Steering GearboxRemovalOverhaulRear Window DefoggerComponentLocalion Index ..............22 104lnstallation
Steering Hanger BeamReplacement
Steering LinkageInspefiron
Steering LockReplacement
Steering Rack GuideAdiustment
22-10522 106
22-106
SeatsComponent Location Index....-............ 20-70
Shift ForksInspectton13,21
20-25
2l-3621 36
21 25
Disassembly/Reassembly ................... 13-22
Shitt Lever TrimRemoval/lnstallation ............................ 20 61
.....11-12
SecirculationReplacementControl Motor17-13Test.....
Recirculation Control Motor CircuitTroubleshooting
Side Airbag, Drivel'sReplacement
Side lmpact SensorsReplacement
Spark Plugs
23-115
23 123
Side Marker LightRep1acement......................................... 22-A3
17417-6Disassembly/Reassembly ..................... 17 71nsta11ation .............................................. 17-8
SublramesReplacement
Removal
RefrigerantReplacement ..-.-.-...................... 21 53, 54, 55Test ........................................................ 21-56
Retrigerant OilReplacement...............................-........... 21-6. .._..4_19
20 112