Page 1665 of 5267
12. Remove Special Tool 8515 (6).
13. Install the timing chain cover (Refer to 9 -
ENGINE/VALVE TIMING/TIMING BELT / CHAIN
COVER(S) - INSTALLATION).
14. Install the crankshaft damper (Refer to 9 -
ENGINE/ENGINE BLOCK/VIBRATION DAMPER -
INSTALLATION).
15. Install accessory drive belt (Refer to 7 - COOL-
ING/ACCESSORY DRIVE/DRIVE BELTS -
INSTALLATION).
16. Install the fan shroud.
17. Install the cylinder head cover (1) (Refer to 9 -
ENGINE/CYLINDER HEAD/CYLINDER HEAD
COVER(S) - INSTALLATION).
18. Install the intake manifold (Refer to 9 - ENGINE/
MANIFOLDS/INTAKE MANIFOLD - INSTALLA-
TION).
19. Install oil fill housing onto cylinder head.
20. Refill the cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
21. Raise the vehicle.
22. Install the exhaust pipe onto the right exhaust
manifold.
23. Lower the vehicle.
24. Reconnect battery negitive cable.
25. Start the engine and check for leaks.
Page 1666 of 5267

CAMSHAFT - LEFT
DESCRIPTION
The camshafts consist of powdered metal steel lobes which are sinter-bonded to a steel tube. A steel post or nose
piece is friction-welded to the steel camshaft tube. Five bearing journals are machined into the camshaft, four on the
steel tube and one on the steel nose piece. Camshaft end play is controlled by two thrust walls that border the nose
piece journal. Engine oil enters the hollow camshafts at the third journaland lubricates every intake lobe rocker
throughadrilledpassageintheintakelobe.
REMOVAL
1. Remove cylinder head cover (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 reset the
tensioner 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 to aid in
installation.
Page 1667 of 5267

CAUTION: Do not hold or pry on the camshaft target wheel (Located on the right side camshaft sprocket)
for any reason, Severe damage will occur to the target wheel resulting in a vehicle no start condition.
4. Loosen butDO NOTremove the camshaft sprocket retaining bolt. Leave the bolt snug against the sprocket.
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 past the narrowest point between the chain strands. Damage to the tension-
ers may occur.
5. Position Special Tool 8350 (4) timing chain wedge between the timing chain strands, tap the tool to securely
wedge the timing chain against the tensioner arm and guide.
NOTE: When gripping the camshaft, place the pli-
ers on the tube portion of the camshaft only. Do
not grip the lobes or the sprocket areas.
6. Hold the camshaft (3) with adjustable pliers (2)
while removing the camshaft sprocket bolt and
sprocket (1).
7. Using the pliers, gently allow the camshaft to rotate
15° clockwise until the camshaft is in the neutral
position (no valve load).
Page 1668 of 5267

8. 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.
9. Remove the camshaft bearing caps and the
camshaft.
INSTALLATION
1. Lubricate camshaft journals with clean engine oil.
NOTE: Position the left side camshaft so that the
camshaft sprocket dowel is near the 1 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
1⁄2turn 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 ꞏm ( 1 0 0 i n . l b s . ) .
Page 1669 of 5267
6. Position the camshaft drive gear into the timing chain aligning the V8 mark between the two marked chain links
(Two links marked during removal) (1).
NOTE: When gripping the camshaft, place the pli-
ers on the tube portion of the camshaft only. Do
not grip the lobes or the sprocket areas.
7. Using the adjustable pliers (1), rotate the camshaft
until the camshaft sprocket dowel (2) is aligned
with the slot in the camshaft sprocket. Install the
sprocket onto the camshaft.
CAUTION: Remove excess oil from camshaft
sprocket bolt. Failure to do so can cause bolt
over-torque resulting in bolt failure.
8. Remove excess oil from bolt, then install the cam-
shaft sprocket retaining bolt and hand tighten.
Page 1670 of 5267
9. Remove Special Tool 8350 timing chain wedge (4).
10. Using Special Tool 6958 spanner wrench (4)with
adapter pins 8346, torque the camshaft sprocket
retaining bolt (2) to 122 Nꞏm (90 ft. lbs.).
11. Install the cylinder head cover (1).
Page 1671 of 5267

CAMSHAFT - RIGHT
DESCRIPTION
The camshafts consist of powdered metal steel lobes which are sinter-bonded to a steel tube. A steel post or nose
piece is friction-welded to the steel camshaft tube. Five bearing journals are machined into the camshaft, four on the
steel tube and one on the steel nose piece. Camshaft end play is controlled by two thrust walls that border the nose
piece journal. Engine oil enters the hollow camshafts at the third journaland lubricates every intake lobe rocker
throughadrilledpassageintheintakelobe.
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 to aid in
installation.
Page 1672 of 5267
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 butDO NOTremove 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.