Manual reparacion Jeep Compass - Patriot Limited 2007-2009_Exhaust

2009 ENGINE
Exhaust System - Compass & Patriot
DESCRIPTION
GAS ENGINE
Fig. 1: FWD EXHAUST SYSTEM
Courtesy of CHRYSLER LLC
The FWD gas engine exhaust system components consist of a catalytic converter, intermediate pipe, muffler,
clamps and support isolators.
Fig. 2: AWD EXHAUST - GAS ENGINE
1 - CATALYTIC CONVERTER
2 - CLAMP
3 - I-PIPE/MUFFLER ASSEMBLY
2009 Jeep Patriot Limited
2009 ENGINE Exhaust System - Compass & Patriot
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Saturday, September 08, 2012 12:58:56 PM Page 1 © 2006 Mitchell Repair Information Company, LLC.
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The AWD gas engine exhaust system components consist of a maniverter, under floor catalytic converter,
intermediate pipe, muffler, clamps and support isolators.
DIESEL ENGINE
Fig. 3: FWD EXHAUST SYSTEM - DIESEL
The basic exhaust system consists of an engine exhaust manifold, turbocharger, exhaust down pipe, exhaust
pipe, exhaust heat shield(s), muffler and exhaust tailpipe.
The exhaust system uses a single muffler.
The exhaust system must be properly aligned to prevent stress, leakage and body contact. If the system contacts
any body panel, it will transfer objectionable noises originating from the engine to the body.
When inspecting an exhaust system, critically inspect for cracked or loose joints, stripped screw or bolt threads,
corrosion damage and worn, cracked or broken hangers. Replace all components that are badly corroded or
damaged. DO NOT attempt to repair.
When replacement is required, use original equipment parts (or equivalent). This will assure proper alignment
and provide acceptable exhaust noise levels.
1 - MANIVERTER
2 - UNDER FLOOR CATALYTIC CONVERTER
3 - CLAMP
4 - I PIPE/MUFFLER ASSEMBLY
2 - CLAMP
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DIAGNOSIS AND TESTING
EXHAUST SYSTEM DIAGNOSIS
RESTRICTION TEST
Exhaust system restriction can be checked by measuring back pressure using the scan tool and PEP module
pressure tester.
1. Disconnect and remove the upstream (before catalytic converter) oxygen sensor. Refer to Fuel
System/Fuel Injection/SENSOR, Oxygen - Removal
CAUTION: Avoid application of rust prevention compounds or undercoating materials
to exhaust system floor pan exhaust heat shields. Light overspray near the
edges is permitted. Application of coating will result in excessive floor pan
temperatures and objectionable fumes.
CONDITION POSSIBLE CAUSES CORRECTION
EXCESSIVE EXHAUST NOISE
(UNDER HOOD)
1. Exhaust manifold cracked
or broken.
1. Replace manifold.
2. Manifold to cylinder head
leak.
2. Tighten manifold and/or replace
gasket.
3. Exhaust flex joint to
manifold leak.
3. Tighten fasteners or replace gasket.
4. Exhaust flex joint. 4. Replace catalytic converter assembly.
5. Pipe and shell noise from
front exhaust pipe.
5. Characteristic of single wall pipes.
EXCESSIVE EXHAUST NOISE 1. Leaks at pipe joints. 1. Tighten or replace clamps at leaking
joints.
2. Burned, blown, or rusted
out exhaust pipe or muffler.
2. Replace muffler or exhaust pipes.
3. Restriction in muffler or
tailpipe.
3. Remove restriction, if possible or
replace as necessary.
4. Catalytic converter
material in muffler.
4. Replace muffler and converter
assembly. Check fuel injection and
ignition systems for proper operation.
WARNING: The normal operating temperature 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 converter
rises to a high level after a short period of engine operation time.
NOTE: For Special Tool identification. See Special Tools .
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2. Install the Back Pressure Test Adaptor CH8519.
3. Connect the Pressure Transducer CH7063 to the back pressure fitting.
4. Following the PEP module instruction service information, connect all required cables to the scan tool
and PEP module. Select the available menu options on the scan tool display screen for using the digital
pressure gauge function.
5. Apply the park brake and start the engine.
6. With transmission in Park or Neutral, raise engine speed to 2000 RPM. Monitor the pressure readings on
the scan tool. Back pressure should not exceed specified limit. Refer to specification in table below
EXHAUST BACK PRESSURE LIMITS.
7. If pressure exceeds maximum limits, inspect exhaust system for restricted component. For further
catalytic converter inspection procedures. See Inspection . Replace component(s) as necessary.
EXHAUST BACK PRESSURE LIMITS
INSPECTION
INSPECTION
Inspect the exhaust pipes, catalytic converters, muffler, and resonators for cracked joints, broken welds and
corrosion damage that would result in a leaking exhaust system. Inspect the clamps, support brackets, and
insulators for cracks and corrosion damage.
ADJUSTMENTS
ADJUSTMENTS
A misaligned exhaust system is usually indicated by a vibration, rattling noise, or binding of exhaust system
components. These noises are sometimes hard to distinguish from other chassis noises. Inspect exhaust system
for broken or loose clamps, heat shields, insulators, and brackets. Replace or tighten as necessary. It is
important that exhaust system clearances and alignment be maintained.
Perform the following procedures to align the exhaust system:
1. Loosen clamps and support brackets.
2. Align the exhaust system starting at the front, working rearward.
3. Tighten all clamps and brackets once alignment and clearances are achieved.
SPECIFICATIONS
TORQUE
Exhaust Back Pressure Limit (Max)
Vehicle in Park/Neutral (no load) @2000 RPM 3.45 kPa (0.5 psi)
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SPECIAL TOOLS
EXHAUST SYSTEM
Fig. 4: DRBIII® Economy Kit - CH6020A
Fig. 5: HOSE, EXHAUST BACK PRESSURE - CH8519
DESCRIPTION N.m Ft. Lbs. In. Lbs.
Fastener, Band Clamps 55 40 -
Fasteners, Catalytic Converter to Exhaust Manifold Flange 28 - 250
Fastener, under floor catalytic converter to maniverter -
AWD
33 24 -
Fasteners, Intermediate Pipe Heat Shield 3.7 - 33
Fasteners, Charge Air Cooler 8 - 70
Hose Clamps, Charge Air Cooler 1.7 - 15
Elbow Support Bracket - - -
M8 Fasteners 28 - 250
M10 Fasteners 58 44 -
Fasteners, Heat Shield 28 - 250
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Fig. 6: CABLE, TRANSDUCER, 15 PSI - CH7063
BRACKETS, SUPPORT AND ISOLATORS
REMOVAL
REMOVAL
Fig. 7: Exhaust System Isolator and Bracket
1. Disconnect isolator from exhaust system component.
2. Remove screws attaching isolator bracket to underbody.
3. Remove isolator assembly.
INSTALLATION
INSTALLATION
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Fig. 8: Exhaust System Isolator and Bracket
1. Position isolator bracket to underbody and install attaching screws. 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.
CONVERTER, CATALYTIC
DESCRIPTION
DESCRIPTION
The combination exhaust manifold/catalytic converter is attached to the intermediate pipe using fasteners and a
gasket for sealing.
The stainless steel catalytic converter body is designed to last the life of the vehicle. Excessive heat can result in
bulging or other distortion, but excessive heat will not be the fault of the converter. If unburned fuel enters the
converter, overheating may occur. If a converter is heat-damaged, correct the cause of the damage at the same
rises to a high level after a short period of engine operation time.
CAUTION: DO NOT remove spark plug wires from plugs or by any other means short
out cylinders. Failure of the catalytic converter can occur due to a
temperature increase caused by unburned fuel passing through the
converter.
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time the converter is replaced. Also, inspect all other components of the exhaust system for heat damage.
Unleaded gasoline must be used to avoid contaminating the catalyst core.
FWD vehicles use a catalytic converter located after the exhaust manifold and before the I-Pipe/Muffler
assembly.
AWD vehicles use a maniverter and an under floor catalytic converter. The under floor catalytic converter is
located between the maniverter and the I-Pipe/muffler assembly.
Diesel engine vehicles use a catalytic converter located between the turbocharger and the I-Pipe/Muffler
assembly.
OPERATION
OPERATION
The three-way catalytic converter simultaneously converts three exhaust emissions into harmless gases.
Specifically, HC and CO emissions are converted into water (H2O) and carbon dioxide (CO2). Oxides of
Nitrogen (NOx) are converted into Nitrogen (N) and Oxygen. The three-way catalyst is most efficient in
converting HC, CO and NOx at the stoichiometric air fuel ratio of 14.7:1.
The oxygen content in a catalyst is important for efficient conversion of exhaust gases. When a high oxygen
content (lean) air/fuel ratio is present for an extended period, oxygen content in a catalyst can reach a
maximum. When a rich air/fuel ratio is present for an extended period, the oxygen content in the catalyst can
become totally depleted. When this occurs, the catalyst fails to convert the gases. This is known as catalyst
"punch through."
Catalyst operation is dependent on its ability to store and release the oxygen needed to complete the emissions-
reducing chemical reactions. As a catalyst deteriorates, its ability to store oxygen is reduced. Since the catalyst's
ability to store oxygen is somewhat related to proper operation, oxygen storage can be used as an indicator of
catalyst performance. Refer to the appropriate ELECTRICAL DIAGNOSTICS for diagnosis of a catalyst
related Diagnostic Trouble Code (DTC).
The combustion reaction caused by the catalyst releases additional heat in the exhaust system, causing
temperature increases in the area of the reactor under severe operating conditions. Such conditions can exist
when the engine misfires or otherwise does not operate at peak efficiency. Do not remove spark plug wires
from plugs or by any other means short out cylinders. Failure of the catalytic converter can occur due to
temperature increases caused by unburned fuel passing through the converter. This deterioration of the catalyst
core can result in excessively high emission levels, noise complaints, and exhaust restrictions.
Unleaded gasoline must be used to avoid ruining the catalyst core. Do not allow engine to operate above 1200
RPM in neutral for extended periods over 5 minutes. This condition may result in excessive exhaust
system/floor pan temperatures because of no air movement under the vehicle.
The flex joint allows flexing as the engine moves, preventing breakage that could occur from the back-and-forth
motion of a transverse mounted engine.
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REMOVAL
UNDER FLOOR CATALYTIC CONVERTER - 2.4L AWD
Fig. 9: UNDER FLOOR CATALYTIC CONVERTER
1. Raise vehicle on hoist and apply penetrating oil to band clamp fastener of component being removed.
CAUTION: Due to exterior physical similarities of some catalytic converters with pipe
assemblies, extreme care should be taken with replacement parts. There
are internal converter differences required in some parts of the country
(particularly vehicles built for States with strict emission requirements)
and between model years.
1 - COMBINATION MANIFOLD/CATALYTIC CONVERTER
2 - SPHERICAL GASKET
3 - BOLT AND SPRING
rises to a high level after a short period of engine operating time.
NOTE: Do not use petroleum-based lubricants when removing/installing muffler
or exhaust pipe isolators as it may compromise the life of the part. A
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2. Remove I-Pipe/Muffler assembly. See Removal.
3. Disconnect oxygen sensor electrical connectors.
4. Remove flange bolts (3), springs and spherical gasket.
5. Remove under floor catalytic converter (4) from maniverter or catalytic converter assembly (1).
6. Clean ends of pipes to assure mating of all parts. Discard broken or worn isolators, rusted or overused
clamps, supports, and attaching parts.
FWD
Fig. 10: Converter to Exhaust Manifold Connection - 2.4L
suitable substitute is a mixture of liquid dish soap and water.
NOTE: If spherical gasket is to be reused, mark orientation.
NOTE: When replacement is required on any component of the exhaust system,
you must use original equipment parts (or their equivalent).
1 - GASKET
3 - NUT
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
converter. The temperature of the converter rises to a high level after a
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1. Loosen intermediate pipe-to catalytic converter clamp.
2. Remove catalytic converter to exhaust manifold mounting nuts and gasket Discard gasket.
3. Remove I-Pipe/Muffler assembly insulators as necessary to slide catalytic converter out of I-Pipe/Muffler.
DIESEL ENGINE - W/O DPF
Fig. 11: CATALYTIC CONVERTER - DIESEL
short period of engine operation time.
original equipment parts (or equivalent) must be used.
2 - CLAMP
3 - GASKET
4 - MOUNTING BOLT
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 converter rises to a high level
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1. Remove the front suspension crossmember. Refer to Frame and Bumpers/Frame/CROSSMEMBER -
Removal
2. Remove the intermediate pipe and muffler. See Removal .
3. Remove the catalytic converter mounting bolt (4).
4. Remove the clamp (2) and gasket (3) from the catalytic converter (1).
5. Remove the catalytic converter (1) from the vehicle.
DIESEL ENGINE - WITH DPF
Fig. 12: Catalytic Converter & Mounting Nuts And Gasket
1. Loosen intermediate pipe-to catalytic converter clamp.
after a short period of engine operation time.
NOTE: Do not use petroleum-based lubricants when removing/installing muffler or
exhaust pipe isolators as it may compromise the life of the part. A suitable
substitute is a mixture of liquid dish soap and water.
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2. Remove catalytic converter to diesel particulate filter (DPF) mounting nuts (4) and gasket (2). Discard
gasket (2).
3. Remove I-Pipe/Muffler assembly insulators as necessary to slide catalytic converter out of I-Pipe/Muffler
assembly.
INSPECTION
INSPECTION
Check catalytic converter for a flow restriction. See Diagnosis and Testing Exhaust System Restriction Check
for procedure.
Visually inspect the catalytic converter element by using a borescope or equivalent. Remove oxygen sensor(s)
and insert borescope. If borescope is not available, remove converter and inspect element using a flashlight.
Inspect element for cracked or melted substrate.
INSTALLATION
UNDER FLOOR CATALYTIC CONVERTER
NOTE: Before replacing a catalytic converter, determine the root cause of failure. Most
catalytic converter failures are caused by air, fuel or ignition problems. (Refer to
Appropriate Diagnostic Information) for test procedures.
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Fig. 13: UNDER FLOOR CATALYTIC CONVERTER
When assembling exhaust system do not tighten clamps until components are aligned and clearances are
checked.
1. Install under floor catalytic converter and the isolator supports to the underbody.
2. Position spherical gasket (2) with white side facing rear of vehicle, install springs, and bolts (3). Tighten
bolts to 33 N.m (24 ft. lbs.).
3. Install I-Pipe/muffler assembly. See Installation
4. Working from the front of system; align each component to maintain position and proper clearance with
underbody parts.
5. Tighten band clamps to 55 N.m (40 ft. lbs.).
1 - COMBINATION MANIFOLD/CATALYTIC CONVERTER
2 - SPHERICAL GASKET
3 - BOLT AND SPRING
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 band has been stretched
and has lost its clamping force and must be replaced.
NOTE: Maintain proper clamp orientation when replacing with new clamp.
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FWD
Fig. 14: Converter to Exhaust Manifold Connection - 2.4L
1. Position catalytic converter into I-Pipe/muffler assembly.
2. Using new gasket, position catalytic converter against exhaust manifold.
3. Install flange nuts. Tighten to 29 N.m (21 ft. lbs.).
underbody parts.
5. Tighten band clamps to 55 N.m (40 ft. lbs.).
DIESEL ENGINE - W/O DPF
1 - GASKET
3 - NUT
center block. Once this occurs, the clamp has lost clamping force
and must be replaced.
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Fig. 15: CATALYTIC CONVERTER - DIESEL
1. Position catalytic converter (1) into the vehicle.
2. Install the gasket (3) and clamp (2). Hand tighten the clamp (2).
3. Install the catalytic converter mounting bolt (4).
4. Install the intermediate pipe. See Installation .
underbody parts.
6. Tighten the clamp (2) to 7 N.m (62 in. lbs.).
7. Tighten the catalytic converter mounting bolt (4) to 28 N.m (21 ft. lbs.).
8. Install the front suspension crossmember. Refer to Frame and Bumpers/Frame/CROSSMEMBER -
Installation
DIESEL ENGINE - WITH DPF
2 - CLAMP
3 - GASKET
4 - MOUNTING BOLT
NOTE: Do not use petroleum-based lubricants when removing/installing muffler or
exhaust pipe isolators as it may compromise the life of the part. A suitable
substitute is a mixture of liquid dish soap and water.
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Fig. 16: Catalytic Converter & Mounting Nuts And Gasket
1. Position catalytic converter into I-Pipe/muffler assembly.
2. Using a new gasket (2), position the catalytic converter (1) against the diesel particulate filter (DPF) (3).
3. Install the flange nuts (4).
Tighten to 29 N.m (21 ft. lbs.).
underbody parts.
5. Tighten the I-Pipe/muffler assembly band clamps to 55 N.m (40 ft. lbs.).
FILTER, DIESEL PARTICULATE (DPF)
DESCRIPTION
DESCRIPTION
A Diesel Particulate Filter (DPF) is installed for exhaust gas after-treatment. The DPF is located downstream of
the main oxidation catalyst. The DPF filters, stores and burns particulate matter (soot) that is generated during
the combustion process. The soot is oxidized to carbon dioxide CO2 at exhaust temperatures over 600° C
center block. Once this occurs, the clamp has lost clamping force
and must be replaced.
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(1,112° F).
OPERATION
OPERATION
The oxidation catalysts raise the exhaust gas temperatures to regenerate the DPF , which is passive regeneration.
If the passive regeneration cannot keep up with the build up of soot in the DPF, the ECM will actively
regenerate the DPF to burn off the soot. Residue remains inside the DPF in the form of non burnable ash. Ash
comes from the oils and other materials that are trapped in the oils and are present in the soot. Ash is not
eliminated by the regeneration cycle. Excessive ash accumulation requires the replacement of the DPF. The
DPF uses a silicon carbide wall-flow monolith with a platinum coating to trap particulates. The monolith
contains a large number of square parallel channels, which run in the axial direction and are separated by thin
porous walls. The channels are alternatively open at one end, but plugged at the other. The exhaust gases flow
through the walls and escape through the pores in the wall material. Particulates, however, are too large to
escape and are trapped in the monolith walls. The ECM starts the regeneration of the DPF if the soot load
exceeds a performance map value. The ECM determines the load condition of the DPF based upon the exhaust
gas pressure upstream and downstream of the DPF. A pressure differential sensor provides the pressure input to
the ECM. During the regeneration process, the ECM raises the temperature in the DPF to burn off the soot
accumulated. Under normal operation, the engine does not produce enough heat to oxidize the soot inside the
DPF. This process requires temperatures above 550 °C (1,022 °F). After regeneration, the ECM reads the actual
pressure difference at the DPF and compares it with a reference value. From this comparison, the ECM
determines the ash quantity inside the DPF.
REMOVAL
DIESEL PARTICULATE FILTER
Fig. 17: PRESSURE DIFFERENTIAL SENSOR - 2.0L DIESEL
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1. Disconnect negative battery cable.
2. Remove the engine cover. Refer to Engine - Removal
3. Remove the air box assembly. Refer to Engine/Air Intake System/BODY, Air Cleaner - Removal
4. Remove the right side rear engine harness bracket.
5. Remove the DPF heat shield.
6. Disconnect the temperature sensor electrical connectors.
7. Remove the temperature sensors from DPF (5).
8. Disconnect the oxygen sensor electrical connector.
9. Remove the oxygen sensor from top of DPF (5).
10. Remove the pressure differential tubing (4) from top of DPF (5).
11. Remove the DPF (5) to turbocharger clamp.
Fig. 18: DIESAL PARTICULATE FILTER TO EXHAUST PIPE FLANGE
12. Raise and support the vehicle.
1 - ELECTRICAL CONNECTOR
2 - PRESSURE DIFFERENTIAL SENSOR
3 - MOUNTING BOLT
4 - UPSTREAM PRESSURE TUBE
5 - DPF
6 - DOWNSTREAM PRESSURE TUBE
7 - TUBING
1 - FLANGE
2 - BOLT
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13. Remove the lower engine splash shield.
14. Remove the exhaust pipe to DPF mounting bolts (2).
15. Remove the exhaust pipe from the muffler and tailpipe assembly.
Fig. 19: DIESAL PARTICULATE FILTER TO AXLE BRACKET BOLTS
16. Remove the lower pressure differential tubing from the DPF.
17. Remove the exhaust manifold temperature sensor.
18. Remove the DPF (1) to axle support bracket bolts (3)
19. Remove the air charge hose at the turbo.
20. Remove the air charge hose at the engine.
21. Remove the front crossmember. Refer to Frame and Bumpers/Frame/CROSSMEMBER - Removal
22. Remove the rear engine mount. Refer to Engine/Engine Mounting/INSULATOR, Engine Mount -
Removal
23. Remove DPF (1) and DPF to turbocharger gasket from vehicle. Discard gasket.
INSTALLATION
DIESEL PARTICULATE FILTER
1 - DPF
2 - AXLE SUPPORT BRACKET
3 - DPF TO AXLE SUPPORT BRACKET BOLTS
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Fig. 20: DIESAL PARTICULATE FILTER TO AXLE BRACKET BOLTS
1. Position the DPF (1) and turbocharger gasket into the vehicle. Do not tighten at this time
2. Install the rear engine mount. Refer to Engine/Engine Mounting/INSULATOR, Engine Mount -
Installation
3. Install the front crossmember. Refer to Frame and Bumpers/Frame/CROSSMEMBER - Installation
4. Install the air charge hose at the engine.
5. Install the air charge hose at the turbo.
6. Install the DPF to the axle support bolts (3). Tighten the bolts to 25 N.m (18 ft. lbs.).
7. Install the exhaust manifold temperature sensor.
8. Install the lower pressure differential tubing into DPF. Tighten the fitting to 45 N.m (33 ft.lbs.)
1 - DPF
2 - AXLE SUPPORT BRACKET
3 - DPF TO AXLE SUPPORT BRACKET BOLTS
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Fig. 21: DIESAL PARTICULATE FILTER TO EXHAUST PIPE FLANGE
9. Install the exhaust pipe to the DPF. Tighten the bolts (2) to 35 N.m (25 ft. lbs.).
10. Install the exhaust pipe to the muffler and tailpipe assembly. Tighten the bolts (2) to 35 N.m (25 ft. lbs.).
11. Install the lower engine splash shield.
12. Lower the vehicle.
1 - FLANGE
2 - BOLT
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13. Using a new gasket, install the DPF (5) , gasket and clamp to the turbocharger. Tighten the clamp nut to
35 N.m (25 ft. lbs.).
14. Install the oxygen sensor into the top of the DPF (5). Tighten to 45 N.m (33 ft. lbs.).
15. Connect the oxygen sensor electrical connector.
16. Install the temperature sensors to the DPF. Tighten the sensors to 45 N.m (33 ft.lbs.).
17. Connect the temperature sensor electrical connectors.
18. Install the upper pressure differential tubing (4) into the DPF (5). Tighten the tubing to 45 N.m (33
ft.lbs.).
19. Install the DPF heat shield.
20. Install the right side rear engine harness bracket.
21. Install the air box assembly. Refer to Engine/Air Intake System/BODY, Air Cleaner - Installation
22. Install engine cover. Refer to Engine - Installation
23. Connect the negative battery cable.
24. Start vehicle and check for leaks. Repair as necessary.
MUFFLER, EXHAUST
REMOVAL
REMOVAL
3 - MOUNTING BOLT
5 - DPF
7 - TUBING
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Fig. 23: MUFFLER ASSEMBLY
1. Raise vehicle on hoist and apply penetrating oil to band clamp nut and bolt of component being removed.
2. Remove exhaust system ground strap (1) at rear of I-Pipe/Muffler assembly (2).
3. Loosen band clamp and remove support isolators (3) at I-Pipe/Muffler assembly (2). Remove I-
Pipe/Muffler assembly (2) from catalytic converter.
4. Clean ends of pipes and muffler to assure mating of all parts. Discard broken or worn isolators, rusted or
overused clamps, supports, and attaching parts.
INSTALLATION
1 - GROUND STRAP
3 - ISOLATOR
rises to a high level after a short period of engine operating time.
NOTE: When replacement is required on any component of the exhaust system, you
must use original equipment parts (or their equivalent).
or exhaust pipe isolators (3) as it may compromise the life of the part. A
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INSTALLATION
Fig. 24: MUFFLER ASSEMBLY
When assembling exhaust system do not tighten clamp until components are aligned and clearances are
checked.
1. Install the I-Pipe/Muffler assembly to catalytic converter and the isolator supports to the underbody.
underbody parts. Tighten band clamp to 55 N.m (40 ft. lbs.).
3. Connect the exhaust system ground strap.
1 - GROUND STRAP
3 - ISOLATOR
center block. Once this occurs, the clamp band has been stretched
and has lost its clamping force and must be replaced.
To replace the band clamp; remove the nut and peel back the ends of
the clamp until spot weld breaks. File or grind remaining weld
material until pipe surface is smooth.
NOTE: Maintain proper clamp orientation when replacing with new clamp.
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SENSOR, EXHAUST PRESSURE
REMOVAL
EXHAUST PRESSURE SENSOR
1. Disconnect and isolate negative battery cable.
2. Remove electrical connector at pressure differential sensor (2).
3. Remove upstream exhaust pressure tube (4) from catalytic converter
4. Remove downstream pressure tube (6) from catalytic converter.
5. Remove pressure differential sensor mounting bolt.
6. Remove pressure differential sensor (2) and tubing (7) from vehicle.
7. Remove tubing (7) from pressure differential sensor (2).
3 - MOUNTING BOLT
5 - DPF
7 - TUBING
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INSTALLATION
EXHAUST PRESSURE SENSOR
1. Install tubing (7) on pressure differential sensor (2).
2. Position pressure differential sensor (2) and tubing (7).
3. Install pressure differential sensor mounting bolt (3). Tighten to 10 N.m (89 in. lbs.).
4. Install downstream pressure tube (6) into catalytic converter. Tighten the fitting to 10 N.m (89 in. lbs.).
5. Install upstream pressure tube (4) into catalytic converter. Tighten the fitting to 10 N.m (89 in. lbs.)
6. Position electrical connector (1) into bracket.
7. Connect negative battery cable.
SENSOR, EXHAUST TEMPERATURE
REMOVAL
3 - MOUNTING BOLT
5 - DPF
7 - TUBING
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REMOVAL
Fig. 27: Exhaust Temperature Sensor - Dpf Exhaust Temperature Sensor - Diesal Particulate Filter
1. Remove engine cover.
2. Disconnect and isolate negative batter cable.
3. Disconnect upstream DPF temperature sensor electrical connector.
4. Remove upstream DPF temperature sensor.
5. Disconnect downstream DPF temperature sensor electrical connector.
6. Remove downstream DPF temperature sensor.
INSTALLATION
INSTALLATION
1 - Upstream DPF Temperature Sensor Electrical Connector
2 - Upstream DPF Temperature Sensor
3 - Downstream DPF Temperature Sensor
4 - Downstream DPF Temperature Sensor Electrical Connector
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Fig. 28: Diesal Particulate Filter Exhaust Temperature Sensor
1. Position DPF downstream temperature sensor into DPF. Tighten to 25 N.m (221 in. lbs.).
2. Connect downstream temperature sensor electrical connector.
3. Position DPF upstream temperature sensor into DPF. Tighten to 25 N.m (221 in. lbs.).
4. Connect upstream temperature sensor electrical connector.
5. Install engine cover.
SHIELD, HEAT
DESCRIPTION
DESCRIPTION
1 - Upstream DPF Temperature Sensor Electrical Connector
2 - Upstream DPF Temperature Sensor
3 - Downstream DPF Temperature Sensor
4 - Downstream DPF Temperature Sensor Electrical Connector
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Fig. 29: Heat Shield
Heat shields (1), are needed to protect both the vehicle and the environment from the high temperatures
developed in the vicinity of the catalytic converter.
REMOVAL
REMOVAL
1. Raise vehicle on hoist.
2. Remove fasteners attaching heat shield.
3. Remove heat shield(s)
INSTALLATION
INSTALLATION
1 - HEAT SHIELD
2 - NUT
3 - NUT
CAUTION: Avoid application of rust prevention compounds or undercoating materials
to exhaust system floor pan heat shield. 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 temperatures and
objectionable fumes.
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Fig. 30: Heat Shield
1. Position heat shield(s) to underbody.
2. Install heat shield fasteners.
3. Inspect heat shield to exhaust system clearances and adjust as necessary.
4. Lower vehicle.
1 - HEAT SHIELD
2 - NUT
3 - NUT
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Manual reparacion Jeep Compass - Patriot Limited 2007-2009_Exhaust