MAINTAINING YOUR VEHICLE
CONTENTS
Engine Compartment 3.7L V6 ..............302
Engine Compartment 4.7L/4.7HO V-8 ........303
Onboard Diagnostic System — OBD II ........304
▫ Loose Fuel Filler Cap Message ............304
Emissions Inspection And Maintenance
Programs ............................305
Replacement Parts ......................306
Dealer Service .........................307
Maintenance Procedures ..................307 ▫
Engine Oil ..........................307
▫ Engine Oil Filter ......................311
▫ Drive Belts — Check Condition And
Tensioner ...........................312
▫ Spark Plugs .........................312
▫ Engine Air Cleaner Filter ................313
▫ Engine Fuel Filter .....................313
▫ Catalytic Converter ....................313
▫ Maintenance-Free Battery ................315
7
Drive Belts — 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 proper engine
performance and emission control. The plugs installed in
your vehicle should operate satisfactorily in normal
service for the mileage indicated in the Maintenance
Chart. New plugs should be installed at this mileage. The
entire set should be replaced if there is any malfunction
due to a faulty spark plug. Check the Vehicle Emissions
Control Information label for the proper type of spark
plug for your vehicle.
CAUTION!
When replacing plugs, do not overtighten. You could
damage them and cause them to leak.
312 MAINTAINING YOUR VEHICLE
Miles 18,000 21,000 24,000 27,000 30,000
(Kilometers) (30 000) (35 000) (40 000) (45 000) (50 000)
Change engine oil and engine oil filter, or at 3
months whichever comes first. X X XXX
Rotate tires. X X X
Check spare tire for proper pressure and correct
stowage. 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
366 SCHEDULE “B”
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Miles 48,000 51,000 54,000 57,000 60,000
(Kilometers) (80 000) (85 000) (90 000) (95 000) (100 000)
Change engine oil and engine oil filter, or at 3
months whichever comes first. X X XXX
Rotate tires. X X X
Check spare tire for proper pressure and correct
stowage. XXX
Change rear axle fluid. X
Change front axle fluid (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. X
368 SCHEDULE “B”
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Miles 78,000 81,000 84,000 87,000 90,000
(Kilometers ) (130 000) (135 000) (140 000) (145 000) (150 000)
Change engine oil and engine oil filter, or at 3
months whichever comes first. X X XXX
Rotate tires. X X X
Check spare tire for proper pressure and correct
stowage. 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. X
SCHEDULE “B” 371
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Miles 105,000 108,000 111,000 114,000 117,000 120,000
(Kilometers) (175 000) (180 000) (185 000) (190 000) (195 000) (200 000)
Change engine oil and engine oil filter, or at 3
months whichever comes first. X X XXXX
Rotate tires. X X X
Check spare tire for proper pressure and cor-
rect stowage. XXX
Change rear axle fluid. X X
Change front axle fluid (4X4). X X
Inspect brake linings. X
Inspect engine air cleaner filter, replace if
necessary. XX
Replace spark plugs. X
Inspect PCV valve, replace as necessary.** X
Inspect auto tension drive belt and replace, if
required. XX
Drain and refill transfer case fluid (4X4). X
SCHEDULE “B” 373
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Schedule “A”
Miles 6,000 12,000 18,000 24,000 30,000
(Kilometers) (10 000) (20 000) (30 000) (40 000) (50 000)
[Months] [6] [12] [18] [24] [30]
Change engine oil and engine oil filter. X X X X X
Rotate tires. X X X X X
Check spare tire for proper pressure and correct
stowage. X X XXX
Check transfer case fluid level (4X4). X
Inspect brake linings. X
Inspect engine air cleaner filter, replace as neces-
sary. X
Replace spark plugs. X
SCHEDULE “A” 375
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Miles 36,000 42,000 48,000 54000 60,000 66,000
(Kilometers) (60 000) (70 000) (80 000) (90 000) (100 000) (110 000)
[Months] [36] [42] [48] [54] [60] [66]
Change engine oil and engine oil filter. X X X X X X
Rotate tires. X X X X X X
Check spare tire for proper pressure and cor-
rect stowage. X X XXXX
Check transfer case fluid level (4X4). X
Flush and replace engine coolant at 60
months, if not replaced at 102,000 miles (170
000 km). X
Inspect brake linings. X X
Inspect engine air cleaner filter, replace if
necessary. X
Replace spark plugs. X
Inspect PCV valve, replace as necessary.** X
Inspect auto tension drive belt and replace, if
required. X
376 SCHEDULE “A”
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