Dodge Durango (DN). Manual — part 432

(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.

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. Leave bolt snug against
sprocket.

NOTE: The

timing

chain

tensioners

must

be

secured prior to removing the camshaft sprockets.
Failure to secure tensioners will allow the tension-
ers 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
tensioners may occur.

(5) Position Special Tool 8350 timing chain wedge

between the timing chain strands. Tap the tool to
securely wedge the timing chain against the ten-
sioner arm and guide (Fig. 97).

(6) Remove the camshaft position sensor (Fig. 98).

(7) Hold the camshaft with adjustable pliers while

removing the camshaft sprocket bolt and sprocket
(Fig. 99).

(8) Using the pliers, gently allow the camshaft to

rotate 45° counter-clockwise until the camshaft is in
the neutral position (no valve load).

(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.

Fig. 95 Camshaft Sprocket Installation

1 – ADJUSTABLE PLIERS
2 – CAMSHAFT DOWEL

Fig. 96 Tightening Left Side Cam Sprocket

Retaining Bolt

1 – TORQUE WRENCH
2 – CAMSHAFT SPROCKET
3 – LEFT CYLINDER HEAD
4 – SPECIAL TOOL 6958 SPANNER WITH ADAPTER PINS 8346

DN

4.7L ENGINE

9 - 59

REMOVAL AND INSTALLATION (Continued)

Fig. 97 Securing Timing Chain Tensioners Using Timing Chain Wedge

1 – LEFT CYLINDER HEAD
2 – RIGHT CYLINDER HEAD

3 – SPECIAL TOOL 8350 WEDGE
4 – SPECIAL TOOL 8350 WEDGE

Fig. 98 Camshaft Position Sensor

1 – CRANKSHAFT POSITION SENSOR
2 – CYLINDER HEAD COVER
3 – CAMSHAFT POSITION SENSOR
4 – RIGHT SIDE CYLINDER BLOCK

Fig. 99 Camshaft Sprocket and Chain

1 – ADJUSTABLE PLIERS
2 – SPROCKET BOLT
3 – CAMSHAFT SPROCKET AND CHAIN
4 – CAMSHAFT

9 - 60

4.7L ENGINE

DN

REMOVAL AND INSTALLATION (Continued)

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 neutral
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 (Fig. 100).

(5) Torque the camshaft bearing cap retaining

bolts to 11 N·m (100 in. lbs.).

(6) Position the camshaft drive gear into the tim-

ing chain aligning the V8 mark between the two
marked

chain

links

(Two

links

marked

during

removal) (Fig. 101).

(7) Using the adjustable pliers, rotate the cam-

shaft until the camshaft sprocket dowel is aligned
with the slot in the camshaft sprocket. Install the
sprocket onto the camshaft (Fig. 102).

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 camshaft sprocket bolt,

then install the camshaft sprocket retaining bolt and
hand tighten.

(9) Remove timing chain wedge special tool 8350

(Fig. 97).

(10) Using Special Tool 6958 spanner wrench with

adapter pins 8346 (Fig. 103), torque the camshaft
sprocket retaining bolt to 122 N·m (90 ft. lbs.).

(11) Install the camshaft position sensor (Fig. 98).
(12) Install the cylinder head cover.

CRANKSHAFT MAIN BEARINGS

CRANKSHAFT MAIN BEARING SELECTION

The main bearings are “select fit” to achieve proper

oil clearances. For main bearing selection, the crank-
shaft position sensor target wheel has grade identifi-
cation marks stamped into it (Fig. 104). These marks
are read from left to right, corresponding with jour-
nal number 1, 2, 3, 4 and 5. The crankshaft position
sensor target wheel is mounted to the number 8
counter weight on the crankshaft.

NOTE: Service main bearings color coded. These
color codes identify what size (grade) the bearing
is.

CHECKING CRANKSHAFT END PLAY

(1) Mount a dial indicator to a stationary point at

front of engine. Locate the probe perpendicular
against nose of crankshaft (Fig. 105).

(2) Move the crankshaft all the way to the rear of

it’s travel.

(3) Zero the dial indicator.
(4) Move the crankshaft all the way to the front of

it’s travel and read the dial indicator. Refer to Crank-
shaft End Play Specification Chart.

OIL PAN 4X2 VEHICLE

REMOVAL

(1) Drain the cooling system. Refer to COOLING

SYSTEM.

(2) Remove the upper fan shroud. Refer to proce-

dure in this section.

(3) Remove the throttle body resonator and air

inlet hose.

(4) Remove the intake manifold. Refer to proce-

dure in this section.

(5) Raise vehicle on hoist.
(6) Disconnect exhaust pipe at exhaust manifolds.

Refer to EXHAUST SYSTEM.

(7) Remove the structural dust cover (Fig. 106).

Refer to procedure in this section.

(8) Drain engine oil and remove oil filter.
(9) Position suitable jack under engine.

Fig. 100 Camshaft Bearing Caps Tightening

Sequence

DN

4.7L ENGINE

9 - 61

REMOVAL AND INSTALLATION (Continued)

(10) Remove both left and right side engine mount

through bolts (Fig. 107).

(11) Raise engine to provide clearance to remove

oil pan.

Fig. 101 Timing Chain to Sprocket Alignment

1 – LEFT CYLINDER HEAD
2 – RIGHT CYLINDER HEAD

Fig. 102 Camshaft Sprocket Installation

1 – ADJUSTABLE PLIERS
2 – CAMSHAFT DOWEL

Fig. 103 Tightening Right Side Cam Sprocket

Retaining Bolt

1 – TORQUE WRENCH
2 – SPECIAL TOOL 6958 WITH ADAPTER PINS 8346
3 – LEFT CAMSHAFT SPROCKET
4 – RIGHT CAMSHAFT SPROCKET

9 - 62

4.7L ENGINE

DN

REMOVAL AND INSTALLATION (Continued)