Jeep Grand Cherokee WK. Manual — part 1205
CAUTION:
Remove
excess
oil
from
camshaft
sprocket retaining bolt before reinstalling bolt.
Failure to do so may cause over-torqueing of bolt
resulting in bolt failure.
6. Position the camshaft drive gear onto the camshaft,
remove oil from bolt then install the retaining bolt.
Using Special Tools, Spanner Wrench 6958 with
Adapter Pins 8346 and a suitable torque wrench
(1), Tighten retaining bolt to 122N·m (90 ft. Lbs.).
7. Remove special tool 8350 (3,4).
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ENGINE - 4.7L SERVICE INFORMATION
WK
8. Rotate the crankshaft two full revolutions, then reverify that the camshaft drive gear V8 marks are in fact aligned.
9. Install the cylinder head covers (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) -
INSTALLATION).
STANDARD PROCEDURE - MEASURING TIMING CHAIN WEAR
NOTE: This procedure must be performed with the
timing chain cover removed.
1. Remove the timing chain cover. (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - REMOVAL).
2. To determine if the secondary timing chains are
worn, rotate the engine clockwise until maximum
tensioner piston (2) extension is obtained. Measure
the distance between the secondary timing chain
tensioner housing and the step ledge on the piston.
The measurement at point (A) must be less than
15mm (0.5906 inches).
3. If the measurement exceeds the specification the
secondary timing chains are worn and require
replacement. (Refer to 9 - ENGINE/VALVE TIM-
ING/TIMING BELT/CHAIN AND SPROCKETS -
REMOVAL).
NOTE: If the secondary chains are to be replaced
the primary chain must also be replaced.
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ENGINE - 4.7L SERVICE INFORMATION
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COVER - TIMING
REMOVAL
1. Disconnect the battery negative cable.
2. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
3. Disconnect both heater hoses at timing cover.
4. Disconnect lower radiator hose at engine.
5. Remove crankshaft damper (Refer to 9 - ENGINE/
ENGINE
BLOCK/VIBRATION
DAMPER
-
REMOVAL).
6. Remove accessory drive belt tensioner assembly
(1).
7. Remove the generator and A/C compressor.
CAUTION: The 4.7L engine uses an RTV sealer
instead of a gasket to seal the front cover to the
engine block, from the factory. For service, Mopar
T
Grey Engine RTV sealant must be substituted.
NOTE: It is not necessary to remove the water
pump for timing cover removal.
8. Remove the bolts holding the timing cover to
engine block.
9. Remove cover.
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ENGINE - 4.7L SERVICE INFORMATION
WK
INSTALLATION
CAUTION: Do not use oil based liquids to clean
timing cover or block surfaces. Use only rubbing
alcohol, along with plastic or wooden scrapers.
Use no wire brushes or abrasive wheels or metal
scrapers, or damage to surfaces could result.
1. Clean timing chain cover and block surface using
rubbing alcohol.
CAUTION: The 4.7L can use a special RTV sealer
instead of a carrier gasket to seal the timing cover
to the engine block, from the factory. For service
repairs, Mopar
T
Grey Engine RTV must be used as
a substitute, if RTV is present. If the front cover
being used has no provisions for the water pas-
sage o-rings, then Mopar
T
Grey Engine RTV must
be applied around the water passages.
2. Inspect the water passage o-rings, if equipped for
any damage, and replace as necessary.
3. Apply Mopar
T
Grey Engine RTV sealer to the front
cover following the path above, using a 3 to 4mm
thick bead.
4. Install cover. Tighten flange head fasteners in
sequence as shown in to 58 N·m (43 ft. lbs.).
5. Install the A/C compressor and generator.
6. Install crankshaft damper (Refer to 9 - ENGINE/
ENGINE BLOCK/VIBRATION DAMPER - INSTAL-
LATION).
7. Install accessory drive belt tensioner assembly.
Tighten fastener to 54 N·m (40 ft. lbs.).
8. Install lower radiator hose.
9. Install both heater hoses.
10. Fill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
11. Connect the battery negative cable.
TIMING CHAIN & SPROCKETS
REMOVAL
1. Disconnect negative cable from battery.
2. Drain cooling system (Refer to 7 - COOLING - STANDARD PROCEDURE).
3. Remove right and left cylinder head covers (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COV-
ER(S) - REMOVAL).
4. Remove radiator fan (Refer to 7 - COOLING/ENGINE/RADIATOR FAN - REMOVAL).
WK
ENGINE - 4.7L SERVICE INFORMATION
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