Intake Manifold - Lower Removal; Inspection; Installation - Chrysler 300M Service Manual

9 - 74 ENGINE
INTAKE MANIFOLD - LOWER
REMOVAL
(1) Perform fuel pressure release procedure. (Refer
to 14 - FUEL SYSTEM/FUEL DELIVERY - STAN-
DARD PROCEDURE)
(2) Drain the cooling system. (Refer to 7 - COOL-
ING - STANDARD PROCEDURE)
(3) Disconnect the radiator upper hose from the
coolant outlet at front of manifold.
(4) Remove the upper intake manifold. (Refer to 9
- ENGINE/MANIFOLDS/INTAKE
REMOVAL)
(5) Disconnect the electrical connectors to fuel
injectors and coolant temperature sensor.
(6) Disconnect heater and coolant bottle supply
hoses from coolant tube at rear of intake manifold
(Fig. 127).
Fig. 127 HEATER SUPPLY HOSE CONNECTIONS
1 - HEATER SUPPLY HOSE
2 - COOLANT BOTTLE SUPPLY HOSE
(7) Disconnect the fuel supply hose from fuel rail.
(Refer to 14 - FUEL SYSTEM/FUEL DELIVERY/
FUEL LINES - STANDARD PROCEDURE)
(8) Remove the screw attaching the fuel rail sup-
port bracket to the throttle body support bracket.
(9) Remove the bolts attaching fuel rail.
(10) Remove fuel rail and injectors as an assembly.
(11) Remove bolts attaching lower intake and
remove intake manifold (Fig. 128).

INSPECTION

Check manifold for:
• Damage and cracks
• Gasket surface damage or warpage
• Damaged fuel injector ports
If the manifold exihibits any of these conditions,
replace the manifold.

INSTALLATION

(1) Clean all sealing surfaces.
NOTE: Gaskets can be reused provided they are
MANIFOLD -
free of tears or cuts.
(2) Inspect gaskets for tears or cuts. Replace as
necessary.
(3) Position gaskets and intake manifold on cylin-
der head surfaces.
(4) Install fuel rail with injectors.
(5) Install intake manifold bolts and gradually
tighten in sequence shown in (Fig. 129) until a
torque of 28 N·m (250 in. lbs.) is obtained.
(6) Install
bracket to the throttle body support bracket.
(7) Connect fuel supply hose to fuel rail. (Refer to
14 - FUEL SYSTEM/FUEL DELIVERY/FUEL LINES
- STANDARD PROCEDURE)
(8) Connect heater and coolant bottle supply hoses
to coolant tube at rear of intake manifold (Fig. 127).
(9) Connect electrical connectors to fuel injectors
and coolant temperature sensor.
(10) Install the upper intake manifold. (Refer to 9 -
ENGINE/MANIFOLDS/INTAKE
INSTALLATION)
(11) Connect the radiator upper hose to the coolant
outlet at front of lower manifold.
(12) Fill the cooling system. (Refer to 7 - COOL-
ING - STANDARD PROCEDURE)
screw attaching fuel
MANIFOLD
LH
rail support
-