Dodge Durango (DN). Manual — part 457
Upper and lower No.3 bearing halves are flanged
to carry the crankshaft thrust loads. They are NOT
interchangeable with any other bearing halves in the
engine (Fig. 31). Bearing shells are available in stan-
dard and the following undersizes: 0.25 mm (0.001
inch), 0.051 mm (0.002 inch), 0.076 mm (0.003 inch),
0.254 mm (0.010 inch) and 0.305 mm (0.012 inch).
Never install an undersize bearing that will reduce
clearance below specifications.
REMOVAL AND INSTALLATION
ENGINE FRONT MOUNTS
REMOVAL—2WD
(1) Disconnect the negative cable from the battery.
(2) Raise hood and position fan to assure clearance
for radiator top tank and hose.
CAUTION: DO NOT lift the engine by the intake
manifold.
(3) Install engine lifting fixture.
(4) Raise vehicle on hoist.
(5) Remove the insulator through bolt (Fig. 32)
(Fig. 33).
(6) Raise engine with lifting fixture SLIGHTLY.
Remove insulator retaining bolts and remove the
insulator assembly.
(7) Remove insulator heat shield and transfer to
new insulator.
INSTALLATION—2WD
(1) With the engine raised SLIGHTLY, position
insulator assembly onto the engine block and install
bolts (Fig. 32) (Fig. 33). Tighten the bolts to 41 N·m
(30 ft. lbs.) torque.
(2) Lower engine with lifting fixture while guiding
insulator assembly into the engine insulator bracket
(Fig. 34).
(3) Install insulator to bracket thru-bolt. Tighten
the thru-bolt nut to 68 N·m (50 ft. lbs.) torque.
(4) Remove lifting fixture.
(5) Connect the negative cable to the battery.
Fig. 29 Compression Ring Chamfer Location
(Typical)
1 – CHAMFER
2 – TOP COMPRESSION RING
3 – SECOND COMPRESSION RING
4 – PISTON
5 – CHAMFER
Fig. 30 Proper Ring Installation
1 – OIL RING SPACER GAP
2 – SECOND COMPRESSION RING GAP OIL RING RAIL GAP
(TOP)
3 – OIL RING RAIL GAP (BOTTOM)
4 – TOP COMPRESSION RING GAP
Fig. 31 Main Bearing Identification
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SERVICE PROCEDURES (Continued)
REMOVAL—4WD
On 4WD vehicles the engine front support brackets
attach directly to engine block and the axle housing.
The brackets provide a solid interconnection for these
units (Fig. 35) (Fig. 36). Engine must be supported
during any service procedures involving the front
support assemblies.
(1) Disconnect the negative cable from the battery.
(2) Raise vehicle on hoist.
(3) Install engine lifting (support) fixture.
(4) Remove front axle. (Refer to Group 3, Differen-
tial and Driveline in this publication.)
(5)
Left mount insulator only. Remove starter
wires and starter motor assembly.
(6) Remove insulator to frame through bolt (Fig.
37).
(7) Raise engine slightly.
(8) Remove upper insulator to support bracket
stud nut and insulator to support through bolt.
(9) Remove engine mount insulator (Fig. 35) (Fig.
36).
(10) If engine support bracket is to be removed/re-
placed, remove support bracket to transmission bell
housing bolt(s) and three (3) support bracket to
engine block bolts. Remove support bracket (Fig. 35)
(Fig. 36).
Fig. 32 Engine Right Front Insulator Mount—2WD
Vehicles
1 – HEAT SHIELD
2 – INSULATOR
Fig. 33 Engine Left Front Insulator Mount—2WD
Vehicles
1 – HEAT SHIELD
2 – INSULATOR
Fig. 34 Engine Mount Insulator at Frame
1 – NUT
2 – INSULATOR
3 – FRAME
4 – THROUGH BOLT
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5.9L ENGINE
9 - 159
REMOVAL AND INSTALLATION (Continued)
INSTALLATION—4WD
(1) If engine support brackets were removed,
install them and their fasteners (Fig. 35) (Fig. 36).
Tighten support bracket to block bolts to 41 N·m (30
ft. lbs.). Tighten support bracket to transmission bell-
housing bolt(s) to 88 N·m (65 ft. lbs.).
(2) Install Engine mount insulator and tighten
insulator to support bracket nut to 41 N·m (30 ft.
lbs.). Tighten insulator to support bracket through
bolt nut to 102 N·m (75 ft. lbs.).
(3) Lower engine and install insulator to frame
through bolt and nut (Fig. 37). Tighten nut to 95 N·m
(70 ft. lbs.).
(4) Install
starter
motor
and
mounting
bolts.
Tighten bolts to 68 N·m (50 ft. lbs.).
(5) Connect starter wires.
(6) Remove engine lifting (support) fixture.
(7) Install front axle assembly (Refer to Group 3,
Differential and Driveline).
(8) Lower the vehicle.
(9) Connect the negative cable to the battery.
ENGINE REAR SUPPORT
REMOVAL—2WD
(1) Disconnect the negative cable from the battery.
(2) Raise the vehicle on a hoist.
(3) Support the transmission with a jack.
(4) Remove engine support bracket and insulator
thru-bolt (Fig. 38).
(5) Raise the transmission and engine slightly.
(6) Remove stud nuts attaching insulator to cross-
member (Fig. 38). Remove insulator.
INSTALLATION—2WD
(1) If the engine support bracket was removed,
position the bracket to the transmission extension
(Fig. 38). Tighten the bolts to 68 N·m (50 ft. lbs.)
torque.
(2) Install the insulator onto crossmember. Tighten
the stud nuts to 41 N·m (30 ft. lbs) torque.
(3) Lower the transmission and engine while align-
ing the engine support bracket to the insulator.
(4) Install thru-bolt in bracket and insulator.
Tighten thru-bolt nut to 68 N·m (50 ft. lbs.) torque.
(5) Remove transmission jack.
(6) Lower the vehicle.
(7) Connect the negative cable to the battery.
Fig. 35 Right Engine Mount Insulator and Support
Bracket—4WD Vehicles
1 – ENGINE SUPPORT BRACKET
2 – INSULATOR
3 – FRONT AXLE
Fig. 36 Left Engine Mount Insulator and Support
Bracket—4WD Vehicles
1 – ENGINE SUPPORT BRACKET
2 – INSULATOR
3 – FRONT AXLE
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REMOVAL AND INSTALLATION (Continued)
REMOVAL—4WD
(1) Disconnect the negative cable from the battery.
(2) Raise the vehicle on a hoist.
(3) Support the transmission with a transmission
jack.
(4) Remove stud nuts holding the insulator to the
crossmember (Fig. 39).
(5) Raise rear of transmission SLIGHTLY.
(6) Remove bolts holding the insulator to the insu-
lator bracket (Fig. 39). Remove the insulator.
INSTALLATION—4WD
(1) If the insulator bracket was removed, install
the bracket to the transmission (Fig. 39). Tighten the
bolts to 28 N·m (250 in. lbs.) torque.
(2) Install the bolts holding insulator to insulator
bracket. Tighten the bolts to 28 N·m (250 in. lbs.)
torque.
(3) Lower rear of transmission while aligning the
insulator studs into the mounting support bracket.
Install stud nuts and tighten to 28 N·m (250 in. lbs.)
torque.
(4) Remove the transmission jack.
(5) Lower the vehicle.
(6) Connect the negative cable to the battery.
ENGINE ASSEMBLY
REMOVAL
(1) Scribe hood hinge outlines on hood. Remove the
hood.
(2) Remove the battery.
(3) Drain cooling system. Refer to COOLING SYS-
TEM.
(4) Remove the air cleaner assembly and air inlet
hose.
(5) Disconnect the radiator and heater hoses.
(6) Set fan shroud aside.
(7) Remove the vacuum lines.
(8) Remove the distributor cap and wiring.
(9) Disconnect the accelerator linkage.
(10) Remove throttle body.
(11) Perform the Fuel System Pressure release
procedure Refer to FUEL SYSTEM.
(12) Disconnect the fuel lines.
(13) Disconnect the starter wires.
(14) Disconnect the oil pressure wire.
Fig. 37 Engine Mount Insulator at Frame—4WD
Vehicles
1 – NUT
2 – ENGINE SUPPORT BRACKET
3 – INSULATOR
4 – NUT
5 – THROUGH BOLT
6 – FRAME
7 – FRONT AXLE
Fig. 38 Rear Insulator—2WD Vehicles
1 – ENGINE SUPPORT BRACKET
2 – THROUGH BOLT
3 – CROSSMEMBER
4 – INSULATOR
5 – TRANSMISSION EXTENSION
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5.9L ENGINE
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REMOVAL AND INSTALLATION (Continued)
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