Dodge Durango (DN). Manual — part 429
INSTALLATION
(1) Install hydraulic lash adjuster making sure
adjusters are at least partially full of oil. This can be
verified by little or no plunger travel when lash
adjuster is depressed.
(2) Install rocker arm(s). Refer to procedure in this
section.
(3) Install cylinder head cover(s). Refer to proce-
dure in this section.
CRANKSHAFT DAMPER
REMOVAL
(1) Disconnect negative cable from battery.
(2) Remove accessory drive belt. Refer to COOL-
ING SYSTEM.
(3) Drain cooling system. Refer to COOLING SYS-
TEM.
(4) Remove radiator upper hose.
(5) Remove upper fan shroud. Refer to COOLING
SYSTEM.
(6) Using Special Tools 6958 Spanner with Adapter
Pins 8346, loosen fan and viscous assembly from
water pump (Fig. 69).
(7) Remove fan and viscous assembly.
(8) Disconnect electrical connector for fan mounted
inside radiator shroud.
NOTE: Transmission cooler line snaps into shroud
lower right hand corner.
(9) Remove crankshaft damper bolt.
(10) Remove damper using Special Tools 8513
Insert and 1026 Three Jaw Puller (Fig. 70).
INSTALLATION
CAUTION: To prevent severe damage to the Crank-
shaft, Damper or Special Tool 8512, thoroughly
clean the damper bore and the crankshaft nose
before installing Damper.
(1) Align crankshaft damper slot with key in
crankshaft. Slide damper onto crankshaft slightly.
CAUTION: Special Tool 8512, is assembled in a
specific sequence. Failure to assemble this tool in
this sequence can result in tool failure and severe
damage to either the tool or the crankshaft.
(2) Assemble Special Tool 8512 as follows, The nut
is threaded onto the shaft first. Then the roller bear-
ing is placed onto the threaded rod (The hardened
bearing surface of the bearing MUST face the nut).
Then the hardened washer slides onto the threaded
rod (Fig. 71). Once assembled coat the threaded rod’s
threads with Mopar
t Nickel Anti-Seize or (Loctite
No. 771).
Fig. 68 Valve Assembly Configuration
1 – VALVE LOCKS (3–BEAD)
2 – RETAINER
3 – VALVE STEM OIL SEAL
4 – INTAKE VALVE
5 – EXHAUST VALVE
6 – VALVE SPRING
Fig. 69 Fan Assembly—Removal/Installation
1 – SPECIAL TOOL 6958 SPANNER WRENCH WITH ADAPTER
PINS 8346
2 – FAN
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4.7L ENGINE
9 - 47
REMOVAL AND INSTALLATION (Continued)
(3) Using Special Tool 8512, press damper onto
crankshaft (Fig. 72).
(4) Install then tighten crankshaft damper bolt to
175 N·m (130 ft. lbs.).
(5) Install fan blade assembly.
(6) Install radiator upper shroud and tighten fas-
teners to 11 N·m (95 in. lbs.).
(7) Connect electrical connector for shroud fan.
(8) Install radiator upper hose.
(9) Install accessory drive belt.
(10) Refill cooling system.
(11) Connect negative cable to battery.
TIMING CHAIN COVER
REMOVAL
(1) Disconnect the battery negative cable.
(2) Drain cooling system and remove viscous fan
drive assembly. Refer to Group 7, Cooling System for
procedures.
(3) Remove radiator shroud. Refer to Group 7,
Cooling System for procedure.
(4) Disconnect both heater hoses at timing cover.
(5) Disconnect lower radiator hose at engine.
(6) Remove crankshaft damper. Refer to procedure
in this section.
(7) Remove accessory drive belt tensioner assembly
(Fig. 73).
(8) Remove the generator and A/C compressor.
(9) Remove cover and gasket (Fig. 74).
INSTALLATION
(1) Clean timing chain cover and block surface.
Inspect cover gasket and replace as necessary.
(2) Install cover and gasket. Tighten fasteners in
sequence as shown in (Fig. 74) to 54 N·m (40 ft. lbs.).
Fig. 70 Crankshaft Damper—Removal
1 – SPECIAL TOOL 8513 INSERT
2 – SPECIAL TOOL 1026
Fig. 71 Proper Assembly Method for Special Tool
8512
1 – BEARING
2 – NUT
3 – THREADED ROD
4 – BEARING HARDENED SURFACE (FACING NUT)
5 – HARDENED WASHER
Fig. 72 Crankshaft Damper—Installation
1 – SPECIAL TOOL 8512
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4.7L ENGINE
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REMOVAL AND INSTALLATION (Continued)
(3) Install the A/C compressor and generator.
(4) Install crankshaft damper. Refer to procedure
in this section.
(5) Install accessory drive belt tensioner assembly.
Tighten fastener to 54 N·m (40 ft. lbs.).
(6) Install lower radiator hose.
(7) Install both heater hoses.
(8) Install radiator shroud and viscous fan drive
assembly. Refer to Group 7, Cooling System for pro-
cedure.
(9) Fill cooling system. Refer to Group 7, Cooling
System for procedures.
(10) Connect the battery negative cable.
TIMING CHAIN AND SPROCKETS
REMOVAL
(1) Disconnect negative cable from battery.
(2) Drain cooling system. Refer to Group 7, Cooling
System for procedures.
(3) Remove right and left cylinder head covers.
Refer to procedure in this section.
(4) Remove radiator fan shroud. Refer to Group 7,
Cooling System for procedure.
(5) Rotate engine until timing mark on crankshaft
damper aligns with TDC mark on timing chain cover
(Fig. 75) (#1 cylinder exhaust stroke) and the cam-
shaft sprocket “V8” marks are at the 12 o’clock posi-
tion (Fig. 76).
(6) Remove power steering pump. Refer to Group
19, Steering for procedures.
(7) Remove access plugs (2) from left and right cyl-
inder heads for access to chain guide fasteners (Fig.
77).
(8) Remove the oil fill housing to gain access to the
right side tensioner arm fastener.
(9) Remove crankshaft damper and timing chain
cover. Refer to procedures in this section.
Fig. 73 Accessory Drive Belt Tensioner
1 – TENSIONER ASSEMBLY
2 – FASTENER TENSIONER TO FRONT COVER
Fig. 74 Timing Chain Cover Fasteners
Fig. 75 Engine Top Dead Center (TDC) Indicator
Mark
1 – TIMING CHAIN COVER
2 – CRANKSHAFT TIMING MARKS
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4.7L ENGINE
9 - 49
REMOVAL AND INSTALLATION (Continued)
(10) Collapse and pin primary chain tensioner
(Fig. 78).
CAUTION: Plate behind left secondary chain ten-
sioner could fall into oil pan. Therefore, cover pan
opening.
(11) Remove secondary chain tensioners.
(12) Remove camshaft position sensor from right
cylinder head (Fig. 79).
Fig. 76 Camshaft Sprocket V8 Marks
1 – LEFT CYLINDER HEAD
2 – RIGHT CYLINDER HEAD
Fig. 77 Cylinder Head Access Plug Location
1 – RIGHT CYLINDER HEAD ACCESS PLUG
2 – LEFT CYLINDER HEAD ACCESS PLUG
Fig. 78 Collapsing And Pinning Primary Chain
Tensioner
1 – PRIMARY CHAIN TENSIONER
2 – ADJUSTABLE PLIERS
3 – SPECIAL TOOL 8514
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4.7L ENGINE
DN
REMOVAL AND INSTALLATION (Continued)
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