Chrysler PT Cruiser. Manual — part 724
Fig. 8 Downstream 1/2 Oxygen Sensor - Typical
1 - DOWN STREAM O2 SENSOR
2 - UP STREAM O2 SENSOR
Fig. 9 Converter to Exhaust Manifold Connection -
1.6L
1 - GASKET
2 - NUT
3 - CATALYTIC CONVERTER
4 - BOLT
5 - SUPPORT BRACKET
Fig. 10 Converter to Exhaust Manifold Connection -
2.0L
1 - FLAG NUT
2 - GASKET
3 - BOLT
4 - NUT
5 - CATALYTIC CONVERTER
Fig. 11 Converter to Exhaust Manifold Connection -
2.4L
1 - GASKET
2 - CATALYTIC CONVERTER
3 - NUT
11 - 10
EXHAUST SYSTEM AND TURBOCHARGER
PT
CATALYTIC CONVERTER (Continued)
INSPECTION
WARNING: THE NORMAL OPERATING TEMPERA-
TURE OF THE EXHAUST SYSTEM IS VERY HIGH.
THEREFORE, NEVER ATTEMPT TO SERVICE ANY
PART OF THE EXHAUST SYSTEM UNTIL IT IS
COOLED. SPECIAL CARE SHOULD BE TAKEN
WHEN WORKING NEAR THE CATALYTIC CON-
VERTER. THE TEMPERATURE OF THE CONVERTER
RISES TO A HIGH LEVEL AFTER A SHORT PERIOD
OF ENGINE OPERATION TIME.
Check catalytic converter for a flow restriction.
(Refer to 11 - EXHAUST SYSTEM - DIAGNOSIS
AND TESTING) Exhaust System Restriction Check
for procedure.
Visually inspect the catalytic converter element by
using a borescope or equivalent. Remove oxygen sen-
sor(s) and insert borescope. If borescope is not avail-
able, remove converter and inspect element using a
flashlight. Inspect element for cracked or melted sub-
strate.
NOTE: Before replacing a catalytic converter, deter-
mine the root cause of failure. Most catalytic con-
verter failures are caused by air, fuel or ignition
problems. (Refer to Appropriate Diagnostic Informa-
tion) for test procedures.
INSTALLATION
NOTE: When assembling exhaust system do not
tighten clamps until all components are aligned and
clearances are checked.
(1) Assemble catalytic converter to exhaust mani-
fold connection. Use a new flange gasket.
(2) Tighten the catalytic converter to exhaust man-
ifold fasteners to 28 N·m (250 in. lbs.) (Fig. 9), (Fig.
10), (Fig. 11) or (Fig. 12).
(3) Install intermediate pipe and muffler (Refer to
11 - EXHAUST SYSTEM/INTERMEDIATE PIPE -
INSTALLATION).
(4) Working from the front of system; align each
component to maintain position and proper clearance
with underbody parts (Fig. 2). For clearance specifi-
cations (Refer to 11 - EXHAUST SYSTEM - SPECI-
FICATIONS).
(5) Tighten band clamps to 47 N·m (35 ft. lbs.).
CAUTION: Band clamps should never be tightened
such that the two sides of the clamps are bottomed
out against the center hourglass shaped center
block. Once this occurs, the clamp has lost clamp-
ing force and must be replaced.
(6) If removed, install downstream oxygen sensor
(Fig. 8).
(7) Connect downstream oxygen sensor electrical
connector.
(8) 1.6L Engine - Connect upstream oxygen sensor
connector.
(9) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(10) Check the exhaust system for contact with the
body panels. Make the necessary adjustments, if
needed.
Fig. 12 Converter to Exhaust Manifold Connection -
2.4L Turbo
1 - FLAG NUT
2 - GASKET
3 - NUT
4 - BOLT
5 - CATALYTIC CONVERTER
PT
EXHAUST SYSTEM AND TURBOCHARGER
11 - 11
CATALYTIC CONVERTER (Continued)
SUPPORT BRACKETS AND
ISOLATORS
REMOVAL
(1) Disconnect isolator from exhaust system com-
ponent.
(2) Remove screws attaching isolator bracket to
underbody (Fig. 13).
(3) Remove isolator assembly (Fig. 13).
INSTALLATION
(1) Position isolator bracket to underbody and
install attaching screws (Fig. 13). Tighten bracket
screws to frame rail to 8.5 N·m (75 in. lbs.) and
bracket screws to the rear panel to 3.7 N·m (33 in.
lbs.).
(2) Connect isolator to exhaust system component.
(3) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(4) Check the exhaust system for contact with the
body panels. Make the necessary adjustments, if
needed.
HEAT SHIELDS
DESCRIPTION
Heat shields (Fig. 14), (Fig. 15), (Fig. 16), and (Fig.
17) are needed to protect both the vehicle and the
environment from the high temperatures developed
in the vicinity of the catalytic converter.
CAUTION: Avoid application of rust prevention com-
pounds or undercoating materials to exhaust sys-
tem floor pan heat shield 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 tem-
peratures and objectionable fumes.
REMOVAL
(1) Raise vehicle on hoist.
(2) Remove fasteners attaching heat shield (Fig.
14), (Fig. 15), (Fig. 16), or (Fig. 17).
(3) Remove heat shield(s).
Fig. 13 Exhaust System Isolator and Bracket
Fig. 14 Heat Shield - Engine Wiring
1 - HEAT SHIELD
2 - NUT
3 - NUT
Fig. 15 Heat Shield - Catalytic Converter
1 - HEAT SHIELD
2 - NUT
11 - 12
EXHAUST SYSTEM AND TURBOCHARGER
PT
INSTALLATION
(1) Position heat shield(s) to underbody.
(2) Install heat shield fasteners (Fig. 14), (Fig. 15),
(Fig. 16), or (Fig. 17).
(3) Inspect heat shield to exhaust system clear-
ances and adjust as necessary (Fig. 2). For clearance
specifications (Refer to 11 - EXHAUST SYSTEM -
SPECIFICATIONS).
(4) Lower vehicle.
(5) Start the engine and inspect for exhaust leaks.
Repair exhaust leaks as necessary.
(6) Check the exhaust system for contact with the
body panels. Make the necessary adjustments, if
needed.
TURBOCHARGER SYSTEM
DIAGNOSIS AND TESTING
DIAGNOSIS AND TESTING - TURBOCHARGER
Check for Diagnostic Trouble Codes (DTC’S) stored
in PCM memory. If any DTC’S are present, refer to
the appropriate Powertrain Diagnostic Information.
TURBOCHARGER DIAGNOSIS
CONDITION
POSSIBLE CAUSES
Low boost pressure, lack
of power
Clogged air filter
Leaks between engine
and turbocharger
Exhaust restriction
Restriction in charge air
cooler hose(s)
Wastegate stuck open
Wastegate actuator
malfunction
Seized turbocharger shaft
Overboost
Wastegate stuck shut
Wastegate actuator
malfunction
Noisy operation or
vibration
Leak(s) in charge air
cooler hose(s)
Intake or exhaust leaks
Oil starvation
Worn turbocharger
bearings
Damaged turbine/
compressor fins
Blue smoke from exhaust
Oil return line blocked
Engine breather clogged
Turbocharger shaft seals
damaged
Fig. 16 Heat Shield - Intermediate Pipe
1 - SCREW
2 - HEAT SHIELD
3 - NUT
4 - SCREW
Fig. 17 Heat Shield - Muffler
1 - HEAT SHIELD
2 - FASTENER
PT
EXHAUST SYSTEM AND TURBOCHARGER
11 - 13
HEAT SHIELDS (Continued)
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст