2005 JEEP GRAND CHEROKEE Pcv

Ignition Cables
Replace the ignition cables (5.7L engines only) at the
mileage interval shown in the maintenance charts.
Crankcase Emission Control System
Proper operation of this system depends on freedom
from sticking or plugging due to deposits. As vehicle
mileage builds up, the PCV valve and passages may
accumulate deposits. If a valve is not working properly,
replace it with a new valve. DO NOT ATTEMPT TO
CLEAN THE OLD PCV VALVE!
Check ventilation hose for indication of damage or
plugging deposits. Replace if necessary.
Fuel Filter
A plugged fuel filter can cause hard starting or limit the
speed at which a vehicle can be driven. Should an
excessive amount of dirt accumulate in the fuel tank,
frequent replacement of the fuel filter which is mounted
in the fuel tank may be necessary.
Air Cleaner Filter
Under normal driving conditions, replace the air filter at
the intervals shown on “Maintenance Schedule A.” If,
however, you drive the vehicle frequently under dusty or
severe conditions, the filter element should be inspected
periodically and replaced if necessary at the intervals
shown on “Maintenance Schedule B.”
WARNING!
The air cleaner can provide protection in the case of
engine backfire. Do not remove the air cleaner
unless it is necessary for repair or maintenance.
Make sure that no one is near the engine compart-
ment before starting the vehicle with the air cleaner
removed. Failure to do so can result in serious
personal injury.
MAINTAINING YOUR VEHICLE 323
7

Miles 18,000 21,000 24,000 27,000 30,000
(Kilometers) (29 000) (34 000) (38 000) (43 000) (48 000)
Change the engine oil and engine oil filter, if not
replaced at 3 months.X X XXX
Rotate the tires. X X X
Inspect the engine air cleaner filter, replace if nec-
essary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Lubricate the upper knuckle ball stud at steering &
suspension ball joints.XXX
Drain and refill the front and rear axles. X
Inspect the brake linings. X
Drain the transfer case and refill.X
SCHEDULE “B” 367
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C
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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 the engine oil and engine oil filter, if not
replaced at 3 months.X X XXX
Rotate the tires. X X X
Inspect the engine air cleaner filter, replace if nec-
essary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Inspect the ignition cables, replace if necessary
(5.7L Only).X
Inspect drive belt, replace if necessary. X
Lubricate the upper knuckle ball stud at steering &
suspension ball joints.XXX
Inspect the brake linings. X X
SCHEDULE “B” 369
8
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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 the engine oil and engine oil filter, if not
replaced at 3 months.X X XXX
Rotate the tires. X X X
Inspect the engine air cleaner filter, replace if nec-
essary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Inspect the drive belt, replace if necessary. X
Lubricate the upper knuckle ball stud at steering &
suspension ball joints.XXX
Drain and refill the transfer case fluid. X
Inspect the brake linings. X
Drain and refill the front and rear axle fluid. X
372 SCHEDULE “B”
8
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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 the engine oil and engine oil filter, if not
replaced at 3 months.X X XXX
Rotate the tires. X X X
Inspect the engine air cleaner filter, replace if nec-
essary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Inspect the ignition cables, replace if necessary
(5.7L Only).X
Inspect the drive belt, replace if necessary. X
Lubricate the upper knuckle ball stud at steering &
suspension ball joints.XXX
Inspect the brake linings. X X
Drain and refill the front and rear axle fluid. X X
374 SCHEDULE “B”
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Miles 60,000 66,000 72,000 78,000
(Kilometers) (96 000) (106 000) (115 000) (125 000)
[Months] [60] [66] [72] [78]
Change the engine oil and engine oil filter. X X X X
Rotate the tires. X X X X
Inspect the engine air cleaner filter, and replace if nec-
essary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Inspect the ignition cables, replace if necessary (5.7L
Only).X
Inspect the drive belt, replace if necessary. X
Lubricate the upper knuckle ball stud at steering & sus-
pension ball joints.XX
Flush and replace the engine coolant/anti-freeze, at 60
months if not done at 102,000 miles (163 000 km).X
Inspect the brake linings. X
Drain the transfer case and refill. X
378 SCHEDULE “A”
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Miles 84,000 90,000 96,000 102, 000
(Kilometers) (134 000) (144 000) (154 000) (163 000)
[Months] [84] [90] [96] [102]
Change the engine oil and engine oil filter. X X X X
Rotate the tires. X X X X
Inspect the engine air cleaner filter, and replace if nec-
essary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Inspect the drive belt, replace if necessary. X
Lubricate the upper knuckle ball stud at steering & sus-
pension ball joints.XX
Inspect the brake linings. X
Flush and replace the engine coolant/anti-freeze if not
replaced at 60 months.X
Drain the transfer case and refill. X
SCHEDULE “A” 379
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Miles 108,000 114,000 120,000
(Kilometers) (173 000) (182 000) (192 000)
[Months] [108] [114] [120]
Change the engine oil and engine oil filter. X X X
Rotate the tires. X X X
Inspect the engine air cleaner filter, and replace if necessary.X
Inspect the PCV Valve, replace if necessary. X
Replace the spark plugs.X
Inspect the ignition cables, replace if necessary (5.7L Only).X
Inspect the drive belt, replace if necessary. X
Lubricate the upper knuckle ball stud at steering & suspension
ball joints.XX
Inspect the brake linings. X
Flush and replace the engine coolant/anti-freeze if not done at
102,000 miles (163 000 km).X
Drain the transfer case and refill.X
380 SCHEDULE “A”
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