2004 DODGE CARAVAN spark plugs replace

MAINTAINING YOUR VEHICLE
CONTENTS
m2.4L Engine...........................298
m3.3L/3.8L Engines......................299
mOnboard Diagnostic System Ð OBD II........300
mEmissions Inspection And Maintenance
Programs............................301
mReplacement Parts......................302
mDealer Service.........................302
mMaintenance Procedures..................303
NEngine Oil..........................303NEngine Oil Filter......................307
NDrive Belts Ð Check Condition And Tension . . 307
NSpark Plugs.........................308
NEngine Air Cleaner Filter................308
NEngine Fuel Filter.....................309
NCatalytic Converter....................309
NMaintenance-Free Battery................311
NAir Conditioner......................312
NPower Steering Ð Fluid Check............314
7

Belts should be inspected for evidence of cuts, cracks, or
glazing, and replaced if there is indication of damage
which could result in belt failure. If adjustment is re-
quired, the belts must be adjusted according to the
specifications and procedures described in the Service
Manual. Low generator belt tension can cause battery
failure. A special tool is required to properly measure
tension and to restore belt tension to factory specifica-
tions.
Also check belt routing to make sure there is no interfer-
ence between the belts and other engine components.
Spark Plugs
Spark plugs must fire properly to assure engine perfor-
mance and emission control. New plugs should be in-
stalled at the specified mileage. The entire set should be
replaced if there is any malfunction due to a faulty sparkplug, malfunctioning spark plugs can damage the cata-
lytic converter. For proper type of replacement spark
plugs, refer to the ªVehicle Emission Control Informa-
tionº label in the engine compartment.
Engine Air Cleaner Filter
Under normal driving conditions, replace the air filter at
the intervals shown on Schedule ªAº. If, however, you
drive the vehicle frequently under dusty or severe con-
ditions, the filter element should be inspected periodi-
cally and replaced if necessary at the intervals shown on
Schedule ªBº.
308 MAINTAINING YOUR VEHICLE

Miles 21, 000 24, 000 27, 000 30, 000 33, 000 36, 000
(Kilometers) (34 000) (38 000) (43 000) (48 000) (53 000) (58 000)
Change engine oil and engine oil filter.XXXXX X
Inspect the brake linings. X X
Inspect the engine air cleaner filter, replace if
necessary. *XXX X X
Replace theengine air cleaner filter.X
Replace thespark plugs2.4 liter engines. X
Inspect the tie rod ends and boot seals. X
Inspect and adjust the power steering pump
belt tension on 2.4 liter engines.X
Inspect the generator belt on 2.4 liter engines,
replace if necessary.X
Inspect thePCV valveand replace as neces-
sary.*X
Change the All Wheel Drive (AWD) power
transfer unit fluid. (See note at the end of this
chart)X
SCHEDULE ªBº 353
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Miles 57, 000 60, 000 63, 000 66, 000 69, 000 72, 000
(Kilometers) (91 000) (96 000) (101 000) (106 000) (110 000) (115 000)
Change engine oil and engine oil filter.XXXXX X
Inspect the brake linings. X X
Inspect the engine air cleaner filter, replace if
necessary. *X XXX X
Replace theengine air cleaner filter.X
Replace thespark plugson 2.4 liter engines. X
Replace theignition cableson 2.4 liter en-
gines.X
Inspect the tie rod ends and boot seals. X
Inspect and adjust the power steering pump
belt tension on 2.4 liter engines.X
Inspect the generator belt on 2.4 liter engines,
replace if necessary.X
Inspect thePCV valveand replace if neces-
sary.*X
356 SCHEDULE ªBº
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Miles 75, 000 78, 000 81, 000 84, 000 87, 000 90, 000
(Kilometers) (120 000) (125 000) (130 000) (134 000) (139 000) (144 000)
Change engine oil and engine oil filter.XXXXX X
Inspect the brake linings. X X
Inspect the engine air cleaner filter, replace if
necessary. *XXXX
Replace theengine air cleaner filterXX
Replace thespark plugson 3.3 liter and 3.8
liter engines.X
Replace theignition cableson 3.3 liter and 3.8
liter engines.X
Replace thespark plugson 2.4 liter engines. X
Inspect and adjust the power steering pump
belt tension on 2.4 liter engines.XX
Inspect the generator belt on 2.4 liter engines,
replace if necessary.XX
Inspect the tie rod ends and boot seals. X
358 SCHEDULE ªBº
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Miles 108, 000 111, 000 114, 000 117, 000 120, 000
(Kilometers) (173 000) (178 000) (182 000) (187 000) (192 000)
Change engine oil and engine oil filter.XXXX X
Inspect the brake linings. X X
Inspect the engine air cleaner filter, replace if neces-
sary. *XXXX
Replace theengine air cleaner filter.X
Replace thespark plugson 2.4 liter engines. X
Replace theignition cableson 2.4 liter engines. X
Inspect and adjust the power steering pump belt
tension on 2.4 liter engines.X
Inspect the generator belt on 2.4 liter engines, re-
place if necessary.X
Inspect engine accessory drive belts on 3.3 liter and
3.8 liter engines, replace if necessary. ³X
Inspect the tie rod ends and boot seals. X
Inspect thePCV valveand replace as necessary.* X
Change the automatic transaxle fluid and filter. X
SCHEDULE ªBº 361
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SCHEDULE ªAº
Miles 6, 000 12, 000 18, 000 24, 000 30, 000 36, 000
(Kilometers) (10 000) (19 000) (29 000) (38 000 ) (48 000) (58 000)
[Months] [6] [12] [18] [24] [30] [36]
Change engine oil and engine oil filter. XXXXXX
Inspect the brake linings. X X
Inspect the engine air cleaner filter, replace if
necessary. *X XXX X
Replace theengine air cleaner filter.X
Replace thespark plugson 2.4 liter engines. X
Inspect the tie rod ends and boot seals. X
Inspect and adjust the power steering pump
belt tension on 2.4 liter engines.X
Replace the air conditioning filter. X X X
SCHEDULE ªAº 363
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Miles 42, 000 48, 000 54, 000 60, 000 66, 000 72, 000
(Kilometers) (67 000) (77 000) (86 000) (96 000) (106 000) (115 000)
[Months] [42] [48] [54] [60] [66] [72]
Change engine oil and engine oil filter. X XXXXX
Inspect the brake linings. X X
Inspect the engine air cleaner filter, replace if
necessary. *XXX XX
Replace theengine air cleaner filter.X
Replace thespark plugson 2.4 liter engines. X
Replace theignition cables2.4 liter engines. X
Inspect and adjust the power steering pump
belt tension on 2.4 liter engines.X
Inspect the tie rod ends and boot seals. X
Inspect the generator belt on 2.4 liter engines,
replace if necessary.XX
Check thePCV valveand replace, if neces-
sary.*X
364 SCHEDULE ªAº
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