Dodge Durango (DN). Manual — part 258
(2) Partially drain cooling system. Refer to COOL-
ING SYSTEM—DRAINING and FILLING in this
Section.
Do not waste reusable coolant. If solution is clean,
drain coolant into a clean container for reuse.
(3) Remove upper radiator hose clamp (Fig. 38)
and hose at radiator.
(4) Unplug wiring harness from A/C compressor.
(5) Remove air cleaner assembly.
(6) Remove accessory drive belt as follows: The
drive belt is equipped with a spring loaded automatic
tensioner (Fig. 41). Relax tension from belt by rotat-
ing tensioner clockwise (as viewed from front) (Fig.
41). When all belt tension has been relaxed, remove
accessory drive belt.
(7) The drive belt idler pulley must be removed to
gain access to one of A/C compressor/generator
bracket mounting bolts. Remove idler pulley bolt and
remove idler pulley (Fig. 40).
(8) Remove oil dipstick tube mounting bolt at side
of A/C-generator mounting bracket.
(9) Disconnect throttle body control cables. Refer
to ACCELERATOR PEDAL and THROTTLE CABLE
in FUEL SYSTEM for procedure.
(10) Remove heater hose clamp and heater hose
from heater hose coolant return tube.
(11) Remove
heater
hose
coolant
return
tube
mounting bolt (Fig. 42) and remove tube from engine.
Discard the old tube O-ring.
(12) Remove
bracket-to-intake
manifold
bolts
(number 1 and 2— (Fig. 40).
(13) Remove six bracket bolts (number 3— (Fig.
40).
(14) Lift and position generator and A/C compres-
sor (along with their common mounting bracket) to
gain access to bypass hose. A block of wood may be
used to hold assembly in position.
(15) Loosen and position both hose clamps to cen-
ter of bypass hose. Remove hose from vehicle.
INSTALLATION
(1) Position bypass hose clamps to center of hose.
(2) Install bypass hose to engine.
(3) Secure both hose clamps (Fig. 38).
(4) Install generator-A/C mounting bracket assem-
bly to engine. Tighten bolts (number 1 and 2— (Fig.
40) to 54 N·m (40 ft. lbs.) torque. Tighten bolts (num-
ber 3— (Fig. 40) to 40 N·m (30 ft. lbs.) torque.
(5) Install a new O-ring to the heater hose coolant
return tube (Fig. 42). Coat the new O-ring with anti-
freeze before installation.
(6) Install coolant return tube and its mounting
bolt to engine (Fig. 42).
(7) Connect throttle body control cables.
(8) Install oil dipstick mounting bolt.
Fig. 41 Automatic Belt Tensioner Assembly
1 – IDLER PULLEY
2 – TENSIONER
3 – FAN BLADE
Fig. 42 Coolant Return Tube—5.2L/5.9L Engines—
Typical
1 – COOLANT RETURN TUBE
2 – WATER PUMP
3 – TUBE MOUNTING BOLT
4 – O-RING
DN
COOLING SYSTEM
7 - 31
REMOVAL AND INSTALLATION (Continued)
(9) Install idler pulley. Tighten bolt to 54 N·m (40
ft. lbs.) torque.
(10) Relax tension from belt tensioner (Fig. 41).
Install drive belt.
CAUTION: When installing serpentine accessory
drive belt, the belt must be routed correctly. If not,
engine may overheat due to water pump rotating in
wrong direction. Refer to (Fig. 43) for correct belt
routing. The correct belt with correct length must
be used.
(11) Install air cleaner assembly.
(12) Install upper radiator hose to radiator.
(13) Connect wiring harness to A/C compressor.
(14) Connect battery negative cable.
(15) Fill cooling system. Refer to Draining and
Filling Cooling System in this section.
(16) Start and warm the engine. Check for leaks.
THERMOSTAT—5.2L/5.9L ENGINE
REMOVAL
WARNING: DO NOT LOOSEN RADIATOR DRAIN-
COCK WITH SYSTEM HOT AND PRESSURIZED.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
Do not waste reusable coolant. If solution is clean,
drain coolant into a clean container for reuse.
If thermostat is being replaced, be sure that
replacement is specified thermostat for vehicle model
and engine type.
Factory installed thermostat housings on 5.2L/5.9L
engines are installed on a gasket with an anti-stick
coating. This will aid in gasket removal and clean-up.
(1) Disconnect negative battery cable at battery.
(2) Drain cooling system until coolant level is
below thermostat. Refer to Draining Cooling System
in this group.
(3) Air
Conditioned
vehicles:
Remove
support
bracket (generator mounting bracket-to-intake mani-
fold) located near rear of generator (Fig. 44).
(4) On air conditioning equipped vehicles, the gen-
erator must be partially removed.
(a) Remove generator drive belt as follows: Drive
belts on 5.2L/5.9L engines are equipped with a
spring loaded automatic belt tensioner (Fig. 45).
(b) Attach a socket/wrench to pulley mounting
bolt of automatic tensioner (Fig. 45).
(c) Rotate
tensioner
assembly
clockwise
(as
viewed from front) until tension has been relieved
from belt.
(d) Remove belt from vehicle.
(e) Remove two generator mounting bolts. Do
not remove any wiring at generator. If equipped
Fig. 43 Belt Routing—5.2L/5.9L Engines
1 – IDLER PULLEY
2 – GENERATOR PULLEY
3 – A/C COMPRESSOR PULLEY
4 – IF W/OUT A/C
5 – POWER STEERING PUMP PULLEY
6 – WATER PUMP PULLEY
7 – CRANKSHAFT PULLEY
8 – AUTOMATIC TENSIONER
Fig. 44 Generator Support Bracket—5.2L/5.9L
Engine
1 – IDLER PULLEY BUSHING
2 – A/C AND/OR GENERATOR MOUNTING BRACKET
3 – IDLER PULLEY
4 – SCREW AND WASHER
7 - 32
COOLING SYSTEM
DN
REMOVAL AND INSTALLATION (Continued)
with 4WD, unplug 4WD indicator lamp wiring har-
ness (located near rear of generator).
(f) Remove generator. Position generator to gain
access for thermostat gasket removal.
WARNING: CONSTANT TENSION HOSE CLAMPS
ARE USED ON MOST COOLING SYSTEM HOSES.
WHEN REMOVING OR INSTALLING, USE ONLY
TOOLS DESIGNED FOR SERVICING THIS TYPE OF
CLAMP, SUCH AS SPECIAL CLAMP TOOL (NUMBER
6094) (Fig. 38). SNAP-ON CLAMP TOOL (NUMBER
HPC-20) MAY BE USED FOR LARGER CLAMPS.
ALWAYS WEAR SAFETY GLASSES WHEN SERVIC-
ING CONSTANT TENSION CLAMPS.
CAUTION: A number or letter is stamped into the
tongue of constant tension clamps (Fig. 39). If
replacement is necessary, use only an original
equipment clamp with matching number or letter.
(5) Remove upper radiator hose clamp and upper
radiator hose at thermostat housing.
(6) Position wiring harness (behind thermostat
housing) to gain access to thermostat housing.
(7) Remove thermostat housing mounting bolts,
thermostat housing, gasket and thermostat (Fig. 46).
Discard old gasket.
INSTALLATION
(1) Clean mating areas of intake manifold and
thermostat housing.
(2) Install thermostat (spring side down) into
recessed machined groove on intake manifold (Fig.
46).
(3) Install gasket on intake manifold and over
thermostat (Fig. 46).
(4) Position thermostat housing to intake manifold.
Note the word FRONT stamped on housing (Fig. 47).
For adequate clearance, this must be placed towards
front of vehicle. The housing is slightly angled for-
ward after installation to intake manifold.
(5) Install two housing-to-intake manifold bolts.
Tighten bolts to 23 N·m (200 in. lbs.) torque.
(6) Install upper radiator hose to thermostat hous-
ing.
(7) Air Conditioned vehicles:
CAUTION: When installing the serpentine acces-
sory drive belt, the belt must be routed correctly. If
not, engine may overheat due to water pump rotat-
ing in wrong direction. Refer to (Fig. 48) for correct
engine belt routing. The correct belt with correct
length must be used.
(a) Install generator. Tighten bolts to 41 N·m (30
ft. lbs.).
Fig. 45 Automatic Belt Tensioner—5.2L/5.9L Engines
1 – IDLER PULLEY
2 – TENSIONER
3 – FAN BLADE
Fig. 46 Thermostat—5.2L/5.9L Engines
1 – THERMOSTAT HOUSING
2 – GASKET
3 – INTAKE MANIFOLD
4 – THERMOSTAT
5 – MACHINED GROOVE
DN
COOLING SYSTEM
7 - 33
REMOVAL AND INSTALLATION (Continued)
(b) Install support bracket (generator mounting
bracket-to-intake manifold) (Fig. 44). Tighten bolts
to 54 N·m (40 ft. lbs.) torque.
(c) Position drive belt over all pulleys except
idler pulley (located between generator and A/C
compressor).
(d) Attach a socket/wrench to pulley mounting
bolt of automatic tensioner (Fig. 45).
(e) Rotate socket/wrench clockwise. Place belt
over idler pulley. Let tensioner rotate back into
place. Remove wrench. Be sure belt is properly
seated on all pulleys.
(8) Fill cooling system. Refer to Refilling Cooling
System in this group.
(9) Connect battery negative cable.
(10) Start and warm the engine. Check for leaks.
THERMOSTAT— 4.7L ENGINE
REMOVAL
WARNING: DO NOT LOOSEN RADIATOR DRAIN-
COCK WITH SYSTEM HOT AND PRESSURIZED.
SERIOUS BURNS FROM COOLANT CAN OCCUR.
Do not waste reusable coolant. If solution is clean,
drain coolant into a clean container for reuse.
If thermostat is being replaced, be sure that
replacement is specified thermostat for vehicle model
and engine type.
(1) Disconnect negative battery cable at battery.
(2) Drain cooling system. Refer to Draining Cool-
ing System in this section.
(3) Raise vehicle on hoist.
(4) Remove splash shield.
(5) Remove lower radiator hose clamp and lower
radiator hose at thermostat housing.
(6) Remove thermostat housing mounting bolts,
thermostat housing and thermostat (Fig. 49).
INSTALLATION
(1) Clean mating areas of timing chain cover and
thermostat housing.
(2) Install thermostat (spring side down) into
recessed machined groove on timing chain cover (Fig.
49).
(3) Position thermostat housing on timing chain
cover.
(4) Install two housing-to-timing chain cover bolts.
Tighten bolts to 13 N·m (115 in. lbs.) torque.
CAUTION: Housing must be tightened evenly and
thermostat must be centered into recessed groove
in timimg chain cover. If not, it may result in a
cracked housing, damaged timing chain cover
threads or coolant leaks.
Fig. 47 Thermostat Position—5.2L/5.9L Engines
Fig. 48 Belt Routing—5.2L/5.9L Engines
1 – IDLER PULLEY
2 – GENERATOR PULLEY
3 – A/C COMPRESSOR PULLEY
4 – IF W/OUT A/C
5 – POWER STEERING PUMP PULLEY
6 – WATER PUMP PULLEY
7 – CRANKSHAFT PULLEY
8 – AUTOMATIC TENSIONER
7 - 34
COOLING SYSTEM
DN
REMOVAL AND INSTALLATION (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст