2004 DODGE RAM 1500 GAS spark plugs replace

MAINTAINING YOUR VEHICLE
CONTENTS
mEngine CompartmentÐ 3.7L/4.7L...........322
mEngine CompartmentÐ 5.7L...............323
mOnboard Diagnostic System (OBD II).........324
mEmissions Inspection And Maintenance
Programs............................324
mDealer Service.........................326
mReplacement Parts......................327
mMaintenance Procedures..................327
NAir Conditioner Maintenance.............327NEngine Oil..........................329
NEngine Oil Filter......................333
NDrive Belts Ð Check Condition And
Tensioner...........................333
NSpark Plugs.........................333
NEngine Air Cleaner Filter................334
NEngine Fuel Filter.....................334
NCatalytic Converter....................335
NEmission-Related Components............336
7

governmental agency for advice on how and where used
oil and oil filters can be safely discarded in your area.
Engine Oil Filter
The engine oil filter should be replaced at every engine
oil change.
Engine Oil Filter Selection
The manufacturer's engines have a full-flow type oil
filter. Use a filter of this type for replacement. The quality
of replacement filters varies considerably. Only high
quality filters should be used to assure most efficient
service. Mopar Engine Oil Filters are a high quality oil
filter and are recommended.
Drive Belts Ð Check Condition and Tensioner
Belt tension is controlled by means of an automatic
tensioner. No belt tension adjustments are required.
However, belt and belt tensioner condition should be
inspected at the specified intervals and replaced if re-
quired. See your authorized dealer for service.At the mileage indicated in the maintenance schedule, all
belts and tensioner should be checked for condition.
Improper belt tension can cause belt slippage and failure.
Belts should be inspected for evidence of cuts, cracks,
glazing or frayed cords and replaced if there is indication
of damage which could result in belt failure. Low gen-
erator belt tension can cause battery failure.
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 spark
plug, 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.
MAINTAINING YOUR VEHICLE 333
7

Miles 18,000 21,000 24,000 27,000 30,000
(Kilometers) (29 000) (34 000) (38 000) (43 000) (48 000)
Change engine oil and engine oil filter. X X X X X
Lubricate outer tie rod ends 2500/3500 (4X4) mod-
els only.XXX
Change rear axle fluid.X
Change front axle fluid (4X4).X
Check transfer case fluid level (4X4).X
Inspect brake linings. X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
Inspect PCV valve, replace as necessary.X*
Drain and refill automatic tranmission fluid and
change main sump filter (45RFE/545RFE only).X
SCHEDULE ªBº 389
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Miles 48,000 51,000 54,000 57,000 60,000
(Kilometers) (77 000) (82 000) (86 000) (91 000) (96 000)
Change engine oil and engine oil filter. X X X X X
Lubricate outer tie rod ends 2500/3500 (4X4) mod-
els only.XXX
Drain and refill transfer case fluid (4X4). X
Change rear axle fluid.X
Change front axle fluid (4X4).X
Inspect brake linings. X X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
Replace ignition cables.X
Inspect PCV valve, replace as necessary.X*
Drain and refill automatic tranmission fluid and
change main sump filter (45RFE/545RFE only).X
SCHEDULE ªBº 391
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Miles 78,000 81,000 84,000 87,000 90,000
(Kilometers) (125 000) (130 000) (134 000) (139 000) (144 000)
Change engine oil and engine oil filter. X X X X X
Lubricate outer tie rod ends 2500/3500 (4X4) mod-
els only.XXX
Change rear axle fluid.X
Change front axle fluid (4X4).X
Check transfer case fluid level (4X4).X
Inspect brake linings. X
Inspect engine air cleaner filter, replace if neces-
sary.X
Replace spark plugs.X
Inspect PCV valve, replace as necessary.X*
Inspect auto tension drive belt and replace if re-
quired (3.7L/4.7L/5.7L).X³
Drain and refill automatic tranmission fluid and
change main sump and spin-on cooler return filter
(if equipped) [45RFE/545RFE only].X
SCHEDULE ªBº 393
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Miles 105,000 108,000 111,000 114,000 117,000 120,000
(Kilometers) (168 000) (173 000) (178 000) (182 000) (187 000) (192 000)
Change engine oil and engine oil filter. X XXXXX
Lubricate outer tie rod ends 2500/3500 (4X4)
models only.XXX
Drain and refill transfer case fluid (4X4). X
Change rear axle fluid. X X
Change front axle fluid (4X4). X X
Inspect brake linings. X X
Inspect engine air cleaner filter, replace if
necessary.XX
Replace spark plugs.X
Replace ignition cables.X
Inspect PCV valve, replace as necessary.X*
Inspect auto tension drive belt and replace if
required (3.7L/4.7L/5.7L).X³ X³
SCHEDULE ªBº 395
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Schedule ªAº
Miles 6,000 12,000 18,000 24,000 30,000
(Kilometers) (10 000) (19 000) (29 000) (38 000) (48 000)
[Months] [6] [12] [18] [24] [30]
Change engine oil and engine oil filter. X X X X X
Check transfer case fluid level (4X4).X
Lubricate outer tie rod ends 2500/3500 (4X4) mod-
els only.X X XXX
Inspect brake linings. X
Replace engine air cleaner filter.X
Replace spark plugs.X
SCHEDULE ªAº 397
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Miles 36,000 42,000 48,000 54,000 60,000 66,000
(Kilometers) (58 000) (67 000) (77 000) (84 000) (96 000) (106 000)
[Months] [36] [42] [48] [54] [60] [66]
Change engine oil and engine oil filter. X XXXXX
Check transfer case fluid level (4X4). X
Lubricate outer tie rod ends 2500/3500 (4X4)
models only.X X XXXX
Flush and replace engine coolant at 60
months, regardless of mileage.X
Inspect brake linings. X X
Replace engine air cleaner filter.X
Replace spark plugs.X
Inspect PCV valve, replace as necessary.X*
Replace ignition cables.X
398 SCHEDULE ªAº
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