Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 264
HEATER SUPPLY TUBE
REMOVAL
3.5L ENGINE
WARNING: Do not remove pressure cap with sys-
tem hot and under pressure because serious
burns from coolant can occur.
1. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
2. Remove upper and lower intake manifold (Refer to
9 - ENGINE/MANIFOLDS/INTAKE MANIFOLD -
UPPER - REMOVAL) and (Refer to 9 - ENGINE/
MANIFOLDS/INTAKE
MANIFOLD
-
LOWER
-
REMOVAL).
3. Position lower intake manifold upside down on
bench and remove the tube retaining bolt (5).
4. Remove heater supply tube (4) from manifold and
discard O-ring (2).
5.7L/6.1L ENGINE
1. Disconnect negative battery cable.
2. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
3. Remove intake manifold (Refer to 9 - ENGINE/
MANIFOLDS/INTAKE MANIFOLD - REMOVAL).
4. Remove heater hoses from heater tubes.
5. Remove heater tube mounting bolts.
6. Remove heater tubes from water pump housing
and remove from vehicle.
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ENGINE
LX
INSTALLATION
3.5L ENGINE
1. Clean heater tube sealing surfaces.
2. Inspect heater tube O-ring (2). Replace as neces-
sary.
3. Lubricate O-ring (2) with a silicone type grease
such as Mopar
T
Dielectric Grease.
4. Install O-ring (2) on heater supply tube (4).
5. Install heater tube (4) on manifold.
6. Install retaining bolts. Tighten bolts to 12 N·m (105
in. lbs.).
7. Install lower and upper intake manifolds (Refer to 9
-
ENGINE/MANIFOLDS/INTAKE
MANIFOLD
-
INSTALLATION
-
Lower)
and
(Refer
to
9
-
ENGINE/MANIFOLDS/INTAKE
MANIFOLD
-
INSTALLATION - Upper).
8. Refill cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
9. Operate engine until it reaches normal operating
temperature. Check cooling system for correct fluid
levels.
5.7L/6.1L ENGINE
1. Position heater tubes into water pump housing.
2. Install mounting bolts. Tighten bolts to 10 N·m (88
in. lbs.).
3. Install heater hose onto heater tubes.
4. Install intake manifold (Refer to 9 - ENGINE/MAN-
IFOLDS/INTAKE MANIFOLD - INSTALLATION).
5. Connect negative battery cable.
6. Fill cooling system (Refer to 7 - COOLING - STAN-
DARD PROCEDURE).
7. Start vehicle and check for cooling system leaks.
LX
ENGINE
7 - 61
RADIATOR
REMOVAL
1. DIsconnect negative battery cable.
2. Drain cooling system (Refer to 7 - COOLING -
STANDARD PROCEDURE).
3. Remove upper radiator hose (2).
4. Remove upper radiator closure panels (1).
5. Remove radiator fan assembly (4) (Refer to 7 -
COOLING/ENGINE/RADIATOR FAN - REMOVAL).
6. Raise vehicle.
7. Remove lower splash shield.
8. Remove lower radiator hose (1).
9. Remove lower condenser mount bolts.
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ENGINE
LX
10. Lower vehicle.
11. Remove upper radiator hose.
CAUTION: Bolts have a tread locker on them, use
hand tools to remove the upper radiator mounting
bolts.
12. Remove upper radiator mounting brackets (1) and
bolts (2).
13. Remove upper condenser mounting bolts.
14. Separate condenser assembly from radiator.
15. Tilt radiator toward engine and remove radiator
from vehicle.
CLEANING
Clean radiator fins are necessary for good heat transfer. The radiator and air conditioning fins should be cleaned
when an accumulation of debris has occurred. With the engine cold, apply cold water and compressed air to the
back (engine side) of the radiator to flush the radiator and/or A/C condenser of debris.
INSPECTION
Inspect the radiator tanks for cracks, broken or missing fittings also inspect the joint where the tanks seam up to the
radiator core for signs of leakage and/or deteriorating seals.
Inspect radiator core for corroded, bent or missing cooling fins. Inspect the core for bent or damaged cooling tubes.
INSTALLATION
1. Position radiator into engine compartment. Seat the
radiator assembly lower rubber isolators into the
mounting holes in radiator lower support.
2.
Install radiator mounting bracket (1) and bolts (2).
Tighten to 12 N·m (106 in. lbs.).
3. Position condenser on radiator and install upper
mounting bolts. Tighten bolts to 6 N·m (50 in. lbs.).
4. Raise vehicle.
LX
ENGINE
7 - 63
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