Chrysler 300M, Dodge Interpid. Manual — part 263
NOTE: To allow enough clearance for catalytic con-
verter removal, remove hanger bracket from hanger
(Fig. 9). The use of a helper under the vehicle to
guide the catalytic converter will ease removal
operation.
(20) Remove catalytic converter by twisting/turn-
ing while pulling up from TOP SIDE of engine com-
partment.
INSTALLATION - RIGHT SIDE
NOTE: To allow enough clearance for catalytic con-
verter installation, remove hanger bracket from
hanger (Fig. 9).
NOTE: Do not reuse V-Band clamp.
(1) Position
a
NEW
V-Band
clamp
onto
the
exhaust manifold outlet. DO NOT latch the clamp’s
T-bolt at this time (Fig. 5).
NOTE: The use of a helper under the vehicle to
guide the catalytic converter will ease installation
operation.
(2) Install catalytic converter from TOP SIDE of
engine compartment. If necessary, stretch open the
V-Band clamp to allow the converter to engage the
manifold outlet.
(3) Latch the V-Band clamp T-bolt.
(4) Install hanger bracket onto hanger (Fig. 9).
(5) Hand start nut attaching right catalytic con-
verter hanger bracket to transaxle bracket (Fig. 5).
(6) Raise engine cradle with transmission jack
until cradle contacts vehicle body. Install rear cradle
bolts. Torque rear cradle bolts to 102 N·m (75 ft.
lbs.). Torque front cradle bolts to 109 N·m (80 ft. lbs.)
(Fig. 8).
(7) Remove jack stands and transmission jack.
(8) Lower vehicle.
NOTE: Check for proper alignment and clearance to
underbody and engine compartment components
before tightening clamps.
(9) Tighten V-Band clamp to 11 N·m (100 in. lbs.).
(10) Install downstream oxygen sensor and connect
electrical connector (Refer to 14 - FUEL SYSTEM/
FUEL INJECTION/O2 SENSOR - INSTALLATION).
(11) Install air cleaner resonator support bracket
to right cylinder head.
(12) Connect ground strap at right frame rail/
shock tower area.
(13) Install air cleaner assembly with air inlet
hose (Fig. 6).
(14) Connect make up air hose to right cylinder
head cover.
(15) Tighten hose clamp for throttle body air inlet
hose.
(16) Connect Inlet Air Temperature (IAT) Sensor
connector.
(17) Raise vehicle on hoist.
(18) Torque nut attaching right catalytic converter
hanger bracket to transaxle bracket to 47 N·m (35 ft.
lbs.) (Fig. 5).
(19) Install
exhaust
system
(Refer
to
11
-
EXHAUST SYSTEM - INSTALLATION).
(20) Lower vehicle.
(21) Connect negative battery cable.
(22) Start the engine and inspect for exhaust
leaks. Repair exhaust leaks as necessary.
(23) Check the exhaust system for contact with the
body panels. Make the necessary adjustments, if
needed.
CATALYTIC CONVERTER -
LEFT
REMOVAL - LEFT SIDE
(1) Loosen and remove V-Band clamp at exhaust
manifold joint (Fig. 5).
NOTE: Do not reuse V-Band clamp.
(2) Hoist vehicle.
(3) Remove
exhaust
system
(Refer
to
11
-
EXHAUST SYSTEM - REMOVAL).
(4) Disconnect downstream oxygen sensor electri-
cal connector and remove sensor from converter pipe
(Refer to 14 - FUEL SYSTEM/FUEL INJECTION/O2
SENSOR - REMOVAL).
Fig. 9 Converter Hanger and Bracket
1 - HANGER BRACKET
2 - HANGER
LH
EXHAUST SYSTEM
11 - 9
CATALYTIC CONVERTER - RIGHT (Continued)
(5) Loosen or remove nut attaching left pipe to
transaxle bracket (Fig. 5).
CAUTION: Care should be taken when removing
converter not to damage driveshaft boot.
(6) Remove converter from below vehicle.
INSTALLATION - LEFT SIDE
(1) Install converter.
(2) Attach a NEW V-Band clamp and tighten to 11
N·m (100 in. lbs.) (Fig. 5).
(3) Install and/or tighten nut attaching pipe to
transaxle bracket to 47 N·m (35 ft. lbs.) (Fig. 5).
(4) Install downstream oxygen sensor and connect
electrical connector (Refer to 14 - FUEL SYSTEM/
FUEL INJECTION/O2 SENSOR - INSTALLATION).
(5) Install
exhaust
system
(Refer
to
11
-
EXHAUST SYSTEM - INSTALLATION).
(6) Lower vehicle.
(7) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(8) Check the exhaust system for contact with the
body panels. Make the necessary ajustments, if
needed.
HEAT SHIELDS
DESCRIPTION
The catalytic converters have an integral heat
shield attached to them and are not to be removed.
OPERATION
Heat shields are needed to protect both the car and
the environment from the high temperatures devel-
oped in the vicinity of the catalytic converters.
CAUTION: Avoid application of rust prevention com-
pounds or undercoating materials to exhaust sys-
tem heat shields on cars if equipped. Light over
spray near the edges is permitted. Application of
coating will greatly reduce the efficiency of the heat
shields resulting in excessive floor pan tempera-
tures and objectionable fumes.
MUFFLER/FRONT RESONATOR
ASSEMBLY
REMOVAL
(1) Remove
exhaust
system
(Refer
to
11
-
EXHAUST SYSTEM - REMOVAL).
(2) Loosen clamp and separate left rear resonator/
pipe from muffler/front resonator assembly (Fig. 1) or
(Fig. 2).
(3) 300M Special: Remove nuts securing right
rear resonator/pipe to muffler/front resonator assem-
bly (Fig. 2).
INSTALLATION
(1) Install left rear resonator/pipe onto new muf-
fler/front resonator (Fig. 1) or (Fig. 2), but do not
tighten clamp until exhaust system is installed on
vehicle.
(2) 300M Special: Install right rear resonator/pipe
onto new muffler/front resonator (Fig. 2), but do not
tighten nuts until exhaust system is installed on
vehicle.
(3) Install
exhaust
system
(Refer
to
11
-
EXHAUST SYSTEM - INSTALLATION).
(4) Align exhaust components for proper clearance.
(5) Tighten all exhaust band clamps to 61 N·m (45
ft. lbs.).
(6) 300M Special: Tighten right rear resonator/
pipe nuts to 28 N·m (250 in. lbs.) (Fig. 2).
(7) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(8) Check the exhaust system for contact with the
body panels. Make the necessary ajustments, if
needed.
RESONATOR - LEFT REAR
REMOVAL
(1) Remove the exhaust system (Refer to 11 -
EXHAUST SYSTEM - REMOVAL).
(2) Loosen the clamp of the left rear resonator/pipe
assembly (Fig. 1) or (Fig. 2).
(3) Remove the left rear resonator/pipe assembly.
INSTALLATION
(1) Install the left rear resonator/pipe assembly
onto the muffler/front resonator assembly and loose
assemble the accompanying clamp (Fig. 1) or (Fig. 2).
(2) Install
exhaust
system
(Refer
to
11
-
EXHAUST SYSTEM - INSTALLATION).
(3) Align exhaust components for proper clearance.
Tighten all band clamps to 61 N·m (45 ft. lbs.).
(4) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(5) Check the exhaust system for contact with the
body panels. Make the necessary ajustments, if
needed.
11 - 10
EXHAUST SYSTEM
LH
CATALYTIC CONVERTER - LEFT (Continued)
RESONATOR - RIGHT REAR
(300M SPECIAL)
REMOVAL
WARNING: THE NORMAL OPERATING TEMPERA-
TURE OF THE EXHAUST SYSTEM IS VERY HIGH.
THEREFORE, NEVER WORK AROUND OR ATTEMPT
TO SERVICE ANY PART OF THE EXHAUST SYSTEM
UNTIL IT IS COOLED. SPECIAL CARE SHOULD BE
TAKEN WHEN WORKING NEAR THE CATALYTIC
CONVERTER. THE TEMPERATURE OF THE CON-
VERTER RISES TO A HIGH LEVEL AFTER A SHORT
PERIOD OF ENGINE OPERATION TIME.
(1) Raise vehicle on hoist.
(2) Apply penetrating oil to right rear resonator/
pipe nuts (Fig. 2).
CAUTION: Do not use any tools to remove the iso-
lators, remove by hand only. Soapy water or sili-
cone-based spray may be used to assist removal.
Do Not use a petroleum-based lubricant on the iso-
lators. This will damage the rubber material.
(3) Remove the rubber isolator from the rear sup-
port bracket on body.
(4) Remove right rear resonator/pipe nuts (Fig. 2).
(5) Remove right rear resonator/pipe assembly.
INSTALLATION
(1) Position right rear resonator/pipe assembly into
mounting position. Loosely install attaching nuts
(Fig. 2).
(2) Install the rubber isolator to the rear support
bracket on body.
(3) Align right rear resonator/pipe for proper clear-
ance. Tighten nuts to 28 N·m (250 in. lbs.).
(4) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(5) Check the exhaust system for contact with the
body panels. Make the necessary ajustments, if
needed.
LH
EXHAUST SYSTEM
11 - 11
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