Jeep Grand Cherokee WK. Manual — part 1189
REMOVAL
1. Remove the cylinder head covers (1) (Refer to 9 -
ENGINE/CYLINDER
HEAD/CYLINDER
HEAD
COVER(S) - REMOVAL).
CAUTION: When the timing chain is removed and the cylinder heads are still installed, DO NOT forcefully
rotate the camshafts or crankshaft independently of each other. Severe valve and/or piston damage can
occur.
CAUTION: When removing the cam sprocket, timing chains or camshaft, Failure to use special tool 8350 will
result in hydraulic tensioner ratchet over extension, Requiring timing chain cover removal to re-set the ten-
sioner ratchet.
2. Set engine to TDC cylinder #1, camshaft sprocket V8 marks at the 12 o’clock position.
3. Mark one link on the secondary timing chain on both sides of the V8 mark on the camshaft sprocket (2) to aid
in installation.
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CAUTION: Do not hold or pry on the camshaft tar-
get wheel for any reason, Severe damage will
occur to the target wheel. A damaged target wheel
could cause a vehicle no start condition.
4. Loosen but DO NOT remove the camshaft sprocket
retaining bolt (2). Leave bolt snug against sprocket
(3).
NOTE: The timing chain tensioners must be secured prior to removing the camshaft sprockets. Failure to
secure tensioners will allow the tensioners to extend, requiring timing chain cover removal in order to reset
tensioners.
CAUTION: Do not force wedge (3) past the narrowest point between the chain strands. Damage to the ten-
sioners may occur.
5. Position Special Tool 8350 timing chain wedge (3) between the timing chain strands. Tap the tool to securely
wedge the timing chain against the tensioner arm and guide.
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ENGINE - 4.7L SERVICE INFORMATION
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6. Remove the camshaft position sensor (1).
NOTE: When gripping the camshaft, place the pli-
ers (1) on the tube portion of the camshaft only.
Do not grip the lobes or the sprocket areas.
7. Hold the camshaft with adjustable pliers (1) while
removing
the
camshaft
sprocket
bolt
(2)and
sprocket (3).
8. Using the pliers (1), gently allow the camshaft to
rotate 45° counter-clockwise until the camshaft is in
the neutral position (no valve load).
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9. Starting at the outside working inward, loosen the
camshaft bearing cap retaining bolts 1/2 turn at a
time. Repeat until all load is off the bearing caps.
CAUTION: DO NOT STAMP OR STRIKE THE CAM-
SHAFT BEARING CAPS. SEVERE DAMAGE WILL
OCCUR TO THE BEARING CAPS.
NOTE: When the camshaft is removed the rocker
arms may slide downward, mark the rocker arms
before removing camshaft.
10. Remove the camshaft bearing caps and the
camshaft.
INSTALLATION
1. Lubricate camshaft journals with clean engine oil.
NOTE: Position the right side camshaft so that the
camshaft sprocket dowel is near the 10 o’clock
position, This will place the camshaft at the neu-
tral position easing the installation of the camshaft
bearing caps.
2. Position the camshaft into the cylinder head.
3. Install the camshaft bearing caps, hand tighten the
retaining bolts.
4. Working in 1/2 turn increments, tighten the bearing
cap retaining bolts starting with the middle cap
working outward.
5. Torque the camshaft bearing cap retaining bolts to
11 N·m (100 in. lbs.).
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ENGINE - 4.7L SERVICE INFORMATION
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