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Engine Exhaust System Chevrolet Camaro V

Exhaust 16 illustrations ~1514 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Catalytic Converter to Exhaust Manifold Nut48 N.m35 lb ft
Exhaust Muffler Clamp48 N.m35 lb ft
Exhaust Muffler (H Pipe) Clamps48 N.m35 lb ft
Exhaust Manifold Heat Shield Bolt10 N.m89 lb in
Underbody Brace58 N.m43 lb ft

Symptoms - Engine Exhaust

  1. Review the Exhaust System Description and Operation in order to familiarize yourself with the system functions. Refer to «Exhaust System Description»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-system-description) .
  2. All diagnostics on a vehicle should follow a logical process. Strategy Based Diagnostics is a uniform approach for repairing all systems. The diagnostic flow is the place to start when repairs are necessary and may always be used in order to resolve a system problem. For a detailed explanation, refer to «Strategy Based Diagnosis»(/chevrolet/camaro/v-2009-2013/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) .

Visual/Physical Inspection

  1. Inspect for aftermarket or non-OEM devices such as, but not including; tailpipe extensions, headers, and exhaust cutouts. This could affect the operation and proper performance of the exhaust system.
  2. Verify the exact operating conditions under which the concern exists. Note factors such as engine RPM, engine temperature, engine load, and frequency of concern.
  3. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause any symptom.

Intermittent

Test the vehicle under the same conditions that the customer reported in order to verify the system is operating as designed.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

  1. Loss of power-Refer to «Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  2. Poor acceleration-Refer to «Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  3. Poor fuel economy-Refer to «Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  4. Excessive smoke-diesel-Refer to «Restricted Exhaust»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  5. Exhaust hissing noise-Refer to «Exhaust Leakage»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-leakage) .
  6. Exhaust popping noise-Refer to «Exhaust Leakage»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-leakage) .
  7. Exhaust rattle noise-Refer to «Exhaust Noise»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-noise) .
  8. Loud exhaust noise-Refer to «Exhaust Noise»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-noise)
  9. Exhaust buzz, groan, hum noise-Refer to «Exhaust Noise»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system__exhaust-noise) .

Special Tools

J 35314-A: Exhaust Back Pressure Gauge

Diagnostic Aids

WARNINGRefer to Hot Exhaust System Warning .

For dual exhaust systems a quick check of exhaust flow will help determine which side of the exhaust system is restricted. The side that has less exhaust flow is the side that will be suspect, and diagnosis should begin there.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 4: The exhaust system has very low back pressure under normal conditions. If the exhaust system is restricted, a significant increase in the exhaust pressure is noticed on the J 35314-A: Exhaust Back Pressure Gauge . Removing the HO2S sensor may set a DTC. When finishing this diagnostic table, be sure to clear all codes.
  2. 5: This step will isolate the catalytic converter from the remainder of the exhaust system.
  3. 8: Confirming that the condition has been fixed is essential. If the symptom still exists and the vehicle has a dual exhaust system, proceed to step 2 and repeat diagnostic procedure on the opposite exhaust pipe.
StepActionValue(s)YesNo
1Did you verify the customers complaint?Go to Step 2
2Did you review the exhaust symptoms diagnostic information and perform the necessary inspections?Go to Step 3Go to Symptoms - Engine Exhaust
3Is the system equipped with dual exhaust?Go to Diagnostic AidsGo to Step 4
4Remove the heated oxygen sensor (HO2S) that is in front of the catalytic converter. Refer Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 . Install the J 35314-A: Exhaust Back Pressure Gauge in place of the HO2S sensor. Start the engine. Increase and monitor the engine speed at 2,500 RPM. Observe the exhaust system back pressure reading on the gauge. Does the reading exceed the specified value?9 kPa (1.25 psi)Go to Step 5Go to Step 8
5Turn the engine off and place the ignition in the lock position. Remove the J 35314-A . See Special Tools . Re-install the HO2S sensor. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 or Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 . Remove the post-catalyst HO2S sensor. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 or Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 . Install the J 35314-A in place of the post HO2S sensor. See Special Tools . Start the engine. Increase and monitor the engine speed at 2,500 RPM. Observe the exhaust system back pressure reading on the gauge. Does the reading exceed the specified value?9 kPa (1.25 psi)Go to Step 6Go to Step 7
6Inspect the exhaust system for the following conditions: Secondary catalyst restricted Damage in the exhaust pipe Debris in the exhaust pipe Muffler or resonator internal failure Two-layer exhaust pipe separation Did you find and correct the condition?Go to Step 8
7Replace the catalytic converter. Refer to Catalytic Converter Replacement - Left Side (LLT) or Catalytic Converter Replacement - Left Side (L99/LS3) or Catalytic Converter Replacement - Right Side (LLT) or Catalytic Converter Replacement - Right Side (L99/LS3) . Did you find and correct the condition?Go to Step 8
8Remove the J 35314-A . See Special Tools . Reinstall the applicable HO2S sensor. Refer to Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 or Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 . Clear any codes. Road test the vehicle in order to verify the repair. Did you correct the condition?System OKGo to Step 2

Restricted Exhaust

Exhaust Leakage

ConditionAction
WARNING: Refer to Hot Exhaust System Warning . DEFINITION: An exhaust leak may show stains at the area of the leak. The leak may be felt by holding a hand close to the suspected areas or using a smoke pencil. The leak may make a popping or hissing noise.Refer to Symptoms - Engine Exhaust prior to beginning this table.
Misaligned or improperly installed exhaust system componentsAlign and tighten the exhaust system components to the specifications. Refer to Fastener Tightening Specifications . Ensure the exhaust hangers are in the proper locations and not loose. Refer to Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement (Vehicle Service) .
Exhaust leaks at the following connections: Exhaust manifold to pipe Flanges Pipe clampsTighten the components to the specifications. Refer to Fastener Tightening Specifications .
Seals or gaskets leaking; Exhaust manifold to cylinder head Exhaust pipes to exhaust manifold Catalytic converter connectionReplace the leaking seal or gasket. Refer to the affected components procedure for service.
Irregularities at the mating surfaces on the flange connectionsRepair as required or replace the affected component. Refer to the affected components procedure for service.
Exhaust manifold cracked or brokenReplace the exhaust manifold. Refer to Exhaust Manifold Replacement - Left Side (LLT) or Exhaust Manifold Replacement - Left Side (L99/LS3) or Exhaust Manifold Replacement - Right Side (LLT) or Exhaust Manifold Replacement - Right Side (L99/LS3) .
Exhaust system component connection welds leakingReplace the leaking component. Refer to the affected component's procedure for service.
Muffler or resonator, if equipped, damaged or leaking at the seamsReplace the affected muffler or resonator, if equipped. Refer to Exhaust Muffler Replacement - Left Side . or Exhaust Muffler Replacement - Right Side
WARNING
Refer to Hot Exhaust System Warning .

Exhaust Noise

ConditionAction
WARNING: Refer to Hot Exhaust System Warning . DEFINITION: An audible or physical noise due to a faulty component or damaged components causing a loose or misaligned exhaust system resulting in a rattle or vibration noise, i.e. buzz, groan, hum.Refer to Symptoms - Engine Exhaust prior to beginning this table.
Popping or hissing noiseExhaust leak-Refer to Exhaust Leakage .
Loud exhaustCompare to a known good vehicle. Inspect for a damaged or failed muffler or resonator, if equipped. Replace the faulty muffler or resonator (if equipped). Refer to Exhaust Muffler Replacement - Left Side . or Exhaust Muffler Replacement - Right Side
External rattle or vibration noiseInspect for a bent or loose hanger, loose heat shield, or loose clamp. Inspect for a exhaust pipe causing interference. Repair or replace the affected component. Refer to the affected component's service procedure.
Internal rattleTest the components by tapping with a rubber mallet to confirm a rattle. Replace the faulty catalytic converter, resonator, if equipped, or muffler. Refer to Exhaust Muffler Replacement - Left Side or Exhaust Muffler Replacement - Right Side
WARNING
Refer to Hot Exhaust System Warning .

Scheme 1

Scheme 1: Exhaust Manifold Replacement - Left Side (LLT)
Scheme 1: Exhaust Manifold Replacement - Left Side (LLT)
CalloutComponent Name
Preliminary Procedure: Remove the left exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side (LLT) or Exhaust Manifold Heat Shield Replacement - Left Side (L99/LS3) .
1Nut (Qty: 2) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tip: Replace the gasket. Clean the cylinder head surface. Clean the exhaust manifold surface. Tighten: 48 N.m (35 lb ft)
2Bolt (Qty: 7) Tighten: 20 N.m (15 lb ft)
3Exhaust Manifold
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .

Removal Procedure

  1. Remove the engine sight shield. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  2. Remove the left bank coil assembly. Refer to «Ignition Coil Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  3. Remove the left bank spark plugs. Refer to «Spark Plug Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  4. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#general-information) .
  5. Remove the left catalytic converter and seal (1). Refer to «Catalytic Converter Replacement - Left Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) or «Catalytic Converter Replacement - Left Side (L99/LS3)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  6. Disconnect the center steering shaft from the lower steering shaft. Separate the shafts and position aside to provide a removal envelope for the manifold. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  7. Lower the vehicle.
  8. Remove the exhaust manifold bolts.
  9. Remove the exhaust manifold, bolts, and gasket. Discard the gasket.
  10. Remove the heat shield from the manifold, if required.
  11. Clean and inspect the exhaust manifold. Refer to «Exhaust Manifold Cleaning and Inspection»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-off-vehicle-2-of-3__exhaust-manifold-cleaning-and-inspection) .

Installation Procedure

Note. Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may effect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.

  1. If necessary, install the exhaust manifold heat shield and bolts and tighten to 10 N.m (89 lb in).
  2. Position the exhaust manifold and a NEW gasket into place.
  3. Lower the vehicle.
  4. Install the exhaust manifold bolts. Refer to «Exhaust Manifold Installation - Left Side»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-off-vehicle-3-of-3__exhaust-manifold-installation-left-side) .
  5. Connect the center steering shaft to the lower steering shaft. Refer to «Intermediate Steering Shaft Replacement»(/chevrolet/camaro/v-2009-2013/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  6. Install the left catalytic converter and seal (1). Refer to «Catalytic Converter Replacement - Left Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) or «Catalytic Converter Replacement - Left Side (L99/LS3)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  7. Lower the vehicle.
  8. Install the left bank spark plugs. Refer to «Spark Plug Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  9. Install the left bank coil assembly. Refer to «Ignition Coil Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  10. Install the engine sight shield. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .

Scheme 2

Scheme 2: Exhaust Manifold Replacement - Right Side (LLT)
Scheme 2: Exhaust Manifold Replacement - Right Side (LLT)
CalloutComponent Name
Preliminary Procedure: Remove the right exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Right Side (LLT) or Exhaust Manifold Heat Shield Replacement - Right Side (L99/LS3) .
1Nut (Qty: 2) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tip: Replace the gasket. Clean the cylinder head surface. Clean the exhaust manifold surface. Tighten: 48 N.m.(35 lb ft)
2Bolt (Qty: 7) Tighten: 20 N.m.(15 lb ft)
3Exhaust Manifold
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .
  1. Remove the engine sight shield. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  2. Remove the right bank coil assembly. Refer to «Ignition Coil Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  3. Remove the right bank spark plugs. Refer to «Spark Plug Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  4. Remove the oil level dipstick tube. Refer to «Oil Level Indicator Tube Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  5. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/camaro/v-2009-2013/remont/ignition-switchsteering-lock/#general-information) .
  6. Remove the right catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) or «Catalytic Converter Replacement - Right Side (L99/LS3)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  7. Remove the starter motor. Refer to «Starter Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LS3/L99)»(/chevrolet/camaro/v-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
  8. Remove the exhaust manifold bolts.
  9. Remove the exhaust manifold, bolts, and gasket. Discard the gasket.
  10. Remove the heat shield from the manifold, if required.
  11. Clean and inspect the exhaust manifold. Refer to «Exhaust Manifold Cleaning and Inspection»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-off-vehicle-2-of-3__exhaust-manifold-cleaning-and-inspection) .

Note. Tighten the exhaust manifold bolts as specified in the service procedure. Improperly installed and/or leaking exhaust manifold gaskets may effect vehicle emissions and/or On-Board Diagnostics (OBD) II system performance.

  1. If necessary, install the exhaust manifold heat shield and bolts and tighten to 9 N.m (80 lb in).
  2. Position the exhaust manifold and a NEW gasket into place.
  3. Install the exhaust manifold bolts. Refer to «Exhaust Manifold Installation - Right Side»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-off-vehicle-3-of-3__exhaust-manifold-installation-right-side) .
  4. Install the starter motor. Refer to «Starter Replacement (LLT)»(/chevrolet/camaro/v-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system) or «Starter Replacement (LS3/L99)»(/chevrolet/camaro/v-2009-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
  5. Install the right catalytic converter. Refer to «Catalytic Converter Replacement - Right Side (LLT)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) or «Catalytic Converter Replacement - Right Side (L99/LS3)»(/chevrolet/camaro/v-2009-2013/remont/exhaust/#engine-exhaust-system) .
  6. Lower the vehicle.
  7. Install the right bank spark plugs. Refer to «Spark Plug Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  8. Install the right bank coil assembly. Refer to «Ignition Coil Replacement»(/chevrolet/camaro/v-2009-2013/remont/testing-diagnostics/#engine-controls-and-fuel-62l-repair-instructions) .
  9. Install the oil level dipstick tube. Refer to «Oil Level Indicator Tube Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .
  10. Install the engine sight shield. Refer to «Engine Cover Replacement»(/chevrolet/camaro/v-2009-2013/remont/mechanical/#engine-mechanical-62l-repair-instructions-on-vehicle) .

Scheme 3

Scheme 3: Catalytic Converter Replacement - Left Side (LLT)
Scheme 3: Catalytic Converter Replacement - Left Side (LLT)
CalloutComponent Name
Preliminary Procedure Remove the left exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side (LLT) or Exhaust Manifold Heat Shield Replacement - Left Side (L99/LS3) . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Disconnect the oxygen sensors.
1Nut (Qty: 2) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tip: Replace the catalytic converter seal. If replacing the catalytic converter, transfer oxygen sensor over to new converter. Tighten: 48 N.m (35 lb ft)
2Clamp Tighten: 48 N.m (35 lb ft)
3Three-Way Catalytic Converter
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .

Scheme 4

Scheme 4: Catalytic Converter Replacement - Left Side (L99/LS3)
Scheme 4: Catalytic Converter Replacement - Left Side (L99/LS3)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the oxygen sensors. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
1Nut (Qty: 2) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tip: Remove the nuts from above the engine compartment. If replacing the catalytic converter, transfer the oxygen sensors over to the new catalytic converter. Tighten: 48 N.m (35 lb ft)
2Clamp Tighten: 48 N.m (35 lb ft)
3Three-way Catalytic Converter
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .

Scheme 5

Scheme 5: Catalytic Converter Replacement - Right Side (LLT)
Scheme 5: Catalytic Converter Replacement - Right Side (LLT)
CalloutComponent Name
Preliminary Procedure Remove the right exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement - Left Side (LLT) or Exhaust Manifold Heat Shield Replacement - Left Side (L99/LS3) . Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the oxygen sensors. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
1Nut (Qty: 2) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tip: Replace the catalytic converter to exhaust manifold seal. If replacing catalytic converter, transfer the oxygen sensors over to the new converter. Tighten: 48 N.m (35 lb ft)
2Clamp Tighten: 48 N.m (35 lb ft)
3Three-Way Catalytic Converter
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .

Scheme 6

Scheme 6: Catalytic Converter Replacement - Right Side (L99/LS3)
Scheme 6: Catalytic Converter Replacement - Right Side (L99/LS3)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Disconnect the oxygen sensors. Refer to Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 and Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 .
1Nut (Qty: 2) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tip: Remove the catalytic to the exhaust manifold nuts from above the engine compartment. Replace the catalytic converter seal. If replacing the catalytic converter, transfer the oxygen sensors over to the new converter. Tighten: 48 N.m (35 lb ft)
2Clamp Tighten: 48 N.m (35 lb ft)
3Three-way Catalytic Converter
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .

Scheme 7

Scheme 7: Underbody Brace Replacement
Scheme 7: Underbody Brace Replacement
CalloutComponent Name
Preliminary Procedure: Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Underbody Brace Bolt (Qty: 4) WARNING: Refer to Hot Exhaust System Warning . CAUTION: Refer to Fastener Caution . Tighten: 25 N.m (18 lb ft)
2Underbody Brace
WARNING
Refer to Hot Exhaust System Warning .
CAUTION
Refer to Fastener Caution .

Scheme 8

Scheme 8: Exhaust Muffler Replacement - Left Side
Scheme 8: Exhaust Muffler Replacement - Left Side
CalloutComponent Name
Preliminary Procedure: Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Clamp CAUTION: Refer to Fastener Caution . Tighten: 48 N.m (35 lb ft)
2Muffler Procedure Cut off the original muffler. Remove the rear muffler hangers. Tip: Cut 66 mm (2.5 in) forward of the muffler.
CAUTION
Refer to Fastener Caution .

Scheme 9

Scheme 9: Exhaust Muffler Replacement - Right Side
Scheme 9: Exhaust Muffler Replacement - Right Side
CalloutComponent Name
Preliminary Procedure: Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Clamp CAUTION: Refer to Fastener Caution . Tighten: 48 N.m (35 lb ft)
2Muffler Procedure Cut off the original muffler. Remove the rear muffler hangers. Tip: Cut 66 mm (2.5 in) forward of the muffler.
CAUTION
Refer to Fastener Caution .

Scheme 10

Scheme 10: Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement (Vehicle Service)
Scheme 10: Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement (Vehicle Service)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Remove the underbody brace. Refer to Underbody Brace Replacement
1Exhaust Clamp Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten: 48 N.m (35 lb ft)
2Exhaust Hanger Rods
3Muffler Assembly. Tip: This exhaust system is not serviced as an assembly, but this procedure is for reference only. Procedure Remove the exhaust clamps from each catalytic converter With the aid of an assistant, remove the exhaust hanger rods from the exhaust isolators. Tip: Squeeze the rear muffler hanger rods through the isolators using a suitable tool. Lubricate the exhaust hanger rods for ease of installation.
CAUTION
Refer to Fastener Caution .

Scheme 11

Scheme 11: Exhaust Muffler Intermediate Heat Shield Replacement
Scheme 11: Exhaust Muffler Intermediate Heat Shield Replacement
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Partially lower and support the exhaust system. Refer to Exhaust Muffler with Resonator, Exhaust, and Tail Pipe Replacement (Vehicle Service) .
1Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tip: Tighten the nuts until secure.
2Exhaust Heat shield
CAUTION
Refer to Fastener Caution .

Scheme 12

Scheme 12: Exhaust Manifold Heat Shield Replacement - Right Side (LLT)
Scheme 12: Exhaust Manifold Heat Shield Replacement - Right Side (LLT)
CalloutComponent Name
1Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2Exhaust Manifold Shield
CAUTION
Refer to Fastener Caution .

Scheme 13

Scheme 13: Exhaust Manifold Heat Shield Replacement - Right Side (L99/LS3)
Scheme 13: Exhaust Manifold Heat Shield Replacement - Right Side (L99/LS3)
CalloutComponent Name
1Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2Exhaust Manifold Shield
CAUTION
Refer to Fastener Caution .

Scheme 14

Scheme 14: Exhaust Manifold Heat Shield Replacement - Left Side (LLT)
Scheme 14: Exhaust Manifold Heat Shield Replacement - Left Side (LLT)
CalloutComponent Name
1Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2Exhaust Manifold Shield
CAUTION
Refer to Fastener Caution .

Scheme 15

Scheme 15: Exhaust Manifold Heat Shield Replacement - Left Side (L99/LS3)
Scheme 15: Exhaust Manifold Heat Shield Replacement - Left Side (L99/LS3)
CalloutComponent Name
1Bolt (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2Exhaust Manifold Shield
CAUTION
Refer to Fastener Caution .

Exhaust System Description

Note. Use of non-OEM parts may cause driveability concerns.

The exhaust system carries exhaust gases, treated by the catalytic converter, through a resonator, if applicable and into the exhaust muffler where exhaust noise is lessened.

In order to secure the exhaust pipe to the exhaust manifold, a flange and seal-joint coupling is utilized. The exhaust system may utilize a slip-joint coupling design with a clamp and a U-bolt or a flange connection with a gasket.

Exhaust hangers and rubber insulators help to support the weight of the exhaust pipe along with insulating any exhaust system vibration, rattle, or noise.

Exhaust hangers also space the exhaust system away from the underbody of the vehicle and allows the exhaust system to expand as the exhaust system warms up.

Exhaust heat shields are used to protect the body and other components from damage due to the heat from the exhaust system.

The exhaust system may be comprised of the following components

  1. Exhaust manifold
  2. Exhaust pipes
  3. Catalytic converters
  4. Exhaust muffler
  5. Exhaust resonator, if equipped
  6. Exhaust tail pipe, if equipped
  7. Exhaust hangers
  8. Exhaust heat shields

Resonator

Some exhaust systems are equipped with a resonator. The resonator, located either before or after the muffler, allows the use of mufflers with less back pressure. Resonators are used when vehicle characteristics require specific exhaust tuning.

Catalytic Converter

The catalytic converter is an emission control device added to the engine exhaust system in order to reduce hydrocarbons (HC), carbon monoxide (CO), and oxides of nitrogen (NOx) pollutants from the exhaust gas.

The catalytic converter is comprised of a ceramic monolith substrate, supported in insulation and housed within a sheet metal shell. The substrate may be washcoated with 3 noble metals

  1. Platinum (Pt)
  2. Palladium (Pd)
  3. Rhodium (Rh)

The catalyst in the converter is not serviceable.

Muffler

The exhaust muffler reduces the noise levels of the engine exhaust by the use of tuning tubes. The tuning tubes create channels inside the exhaust muffler that lower the sound levels created by the combustion of the engine.

Illustration Tool Number/ Description EN 35314-A J 35314-A Exhaust Back Pressure Gauge

Scheme 16

Scheme 16: Special Tools
Scheme 16: Special Tools