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Exhaust System: Component Locations Saab 9-4X I

Exhaust 5 illustrations ~280 words

Special Tools

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

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

EN 35314-A Exhaust Back Pressure Gauge.

For equivalent regional tools, refer to SPECIAL TOOLS .

Location (pos)

  1. 01 - Front
  2. 02 - Rear
  3. 03 - Left
  4. 04 - Right Hand
  5. 05 - All
  6. 06 - Upper
  7. 07 - Center
  8. 08 - Lower
  9. 09 - Service Information
Object code - IDDescriptionConditionVariantModel yearCorrectionTerminalTime (hrs)
25410-01Injection pump, secondary air2011010.2
25421-01Air intake pipe2011013.3
25441-01Oxygen SensorHeated Oxygen Sensor Replacement - Sensor 12011010.4
25441-02Oxygen SensorHeated Oxygen Sensor Replacement - Sensor 22011010.4
25441-03Oxygen SensorHeated Oxygen Sensor Replacement - Bank 1 Sensor 1201101040.5
25441-04Oxygen SensorHeated Oxygen Sensor Replacement - Bank 1 Sensor 2201101040.4
25441-05Oxygen SensorHeated Oxygen Sensor Replacement - Bank 2 Sensor 1201101030.4
25441-06Oxygen SensorHeated Oxygen Sensor Replacement - Bank 2 Sensor 2201101030.4
25445-01Protection2011010.7
25451-01Catalytic Converter2011012.2
25451-02Catalytic Converter201101031.4
25451-03Catalytic Converter201101041.9
25451-04Catalytic ConverterThree-Way Catalytic Converter ReplacementA28NER2011012.8
  1. 01 - Front
  2. 02 - Rear
  3. 03 - Left
  4. 04 - Right Hand
  5. 05 - All
  6. 06 - Upper
  7. 07 - Center
  8. 08 - Lower
  9. 09 - Service Information

Scheme 18

Scheme 18: Exhaust Manifold Replacement - Left Side (LAU)
Scheme 18: Exhaust Manifold Replacement - Left Side (LAU)
CalloutComponent Name
Preliminary Procedures Remove the secondary air injection pump pipe. Refer to SECONDARY AIR INJECTION PUMP PIPE REPLACEMENT . Remove the secondary air injection pump hose. Refer to SECONDARY AIR INJECTION PUMP HOSE REPLACEMENT . Remove the left exhaust manifold heat shield. Refer to EXHAUST MANIFOLD HEAT SHIELD REPLACEMENT - LEFT SIDE (LAU) . Remove the secondary air injection pipe bolts from the manifold. Refer to SECONDARY AIR INJECTION PIPE REPLACEMENT . Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
1Nut (Qty: 7) Refer to WARNING: SERVICING EXHAUST SYSTEM . Refer to CAUTION: RETAINER Tighten 20 Nm (15 lb ft)
2Gasket
3Exhaust Turbocharger Inlet Pipe Nuts Tighten 20 Nm (15 lb ft)
4Exhaust Manifold Procedure Remove and discard the exhaust manifold gasket. Clean any exhaust manifold gasket debris from the cylinder head and exhaust manifold. Tighten the exhaust manifold nuts working from the center out.

Scheme 19

Scheme 19: Exhaust Manifold Replacement - Right Side (LAU)
Scheme 19: Exhaust Manifold Replacement - Right Side (LAU)
CalloutComponent Name
Preliminary Procedures Remove the catalytic converter. Refer to CATALYTIC CONVERTER REPLACEMENT (LAU) . Remove the right catalytic converter heat shield. Refer to EXHAUST MANIFOLD HEAT SHIELD REPLACEMENT - RIGHT SIDE (LAU) . Disconnect the exhaust turbocharger inlet pipe bank 2. Refer to EXHAUST TURBOCHARGER INLET PIPE REPLACEMENT - BANK 2 (LAU) Raise and support the vehicle. Refer to LIFTING AND JACKING THE VEHICLE .
1Nut (Qty: 7) Refer to WARNING: SERVICING EXHAUST SYSTEM . Refer to CAUTION: RETAINER Tighten 20 Nm (15 lb ft)
2Gasket
3Exhaust Manifold Procedure Remove and discard the exhaust manifold gasket. Clean any exhaust manifold gasket debris from the cylinder head and exhaust manifold. Tighten the exhaust manifold nuts working from the center out.

Scheme 20

Scheme 20: Exhaust Turbocharger Inlet Pipe Replacement - Bank 1 (LAU)
Scheme 20: Exhaust Turbocharger Inlet Pipe Replacement - Bank 1 (LAU)
CalloutComponent Name
Preliminary Procedures Remove the catalytic converter heat shield. Refer to CATALYTIC CONVERTER HEAT SHIELD REPLACEMENT (LAU) . Remove the catalytic converter. Refer to CATALYTIC CONVERTER REPLACEMENT (LAU) . Remove the right exhaust manifold heat shield. Refer to EXHAUST MANIFOLD HEAT SHIELD REPLACEMENT - RIGHT SIDE (LAU) . Remove the transmission heat shield. Refer to TRANSMISSION HEAT SHIELD REPLACEMENT (LAU) .
1Exhaust Turbocharger Inlet Pipe Bolt (Qty: 2) Refer to WARNING: SERVICING EXHAUST SYSTEM . Refer to CAUTION: RETAINER . Tighten 30 Nm (22 lb ft)
2Exhaust Turbocharger Inlet Pipe Bolt (Qty: 3) Tighten 20 Nm (17 lb ft)
3Seal NOTE: Replace the exhaust turbocharger inlet pipe seal.
4Exhaust Turbocharger Inlet Pipe
NOTE
Replace the exhaust turbocharger inlet pipe seal.

Scheme 21

Scheme 21: Exhaust Turbocharger Inlet Pipe Replacement - Bank 2 (LAU)
Scheme 21: Exhaust Turbocharger Inlet Pipe Replacement - Bank 2 (LAU)
CalloutComponent Name
See WARNING: SERVICING EXHAUST SYSTEM . Refer to WARNING: SERVICING EXHAUST SYSTEM . Preliminary Procedures Remove the radiator outlet pipe. Refer to RADIATOR OUTLET PIPE REPLACEMENT (LAU) . Remove the left side exhaust manifold heat shield. Refer to EXHAUST MANIFOLD HEAT SHIELD REPLACEMENT - LEFT SIDE (LAU)
1Exhaust Turbocharger Inlet Pipe Nut (Qty 3) Refer to CAUTION: RETAINER Tighten 20 Nm (15 lb ft)
2Turbocharger Nut (Qty: 2) Tighten 20 Nm (15 lb ft)
3Seal
4Exhaust Turbocharger Inlet Pipe-Bank 2

Scheme 22

Scheme 22: Catalytic Converter Replacement (LAU)
Scheme 22: Catalytic Converter Replacement (LAU)
CalloutComponent Name
Preliminary Procedures Remove the catalytic converter heat shield. Refer to CATALYTIC CONVERTER HEAT SHIELD REPLACEMENT (LAU) . Remove the transmission heat shield. Refer to TRANSMISSION HEAT SHIELD REPLACEMENT (LAU) Remove the master cylinder heat shield. Remove the oxygen sensors. Refer to HEATED OXYGEN SENSOR REPLACEMENT - SENSOR 1 (LAU) and HEATED OXYGEN SENSOR REPLACEMENT - SENSOR 2 (LAU) . Remove the exhaust flexible pipe. Refer to EXHAUST FLEXIBLE PIPE REPLACEMENT (LAU) or EXHAUST FLEXIBLE PIPE REPLACEMENT (LF1-SERVICE) .
1Catalytic Converter Nut (Qty: 3)
2Catalytic Converter Support Bolt
3Catalytic Converter Brace Bolt (Qty: 2)
4Catalytic Converter Bracket Bolt (Qty: 2)
5Catalytic Converter Procedure: Apply lubricant to the turbocharger stud bolts. Refer to ADHESIVES, FLUIDS, LUBRICANTS, AND SEALERS . Refer to WARNING: SERVICING EXHAUST SYSTEM . Refer to CAUTION: RETAINER . Torque the catalytic converter bolts in the following sequence: Tighten Tighten "1" to 15 Nm (11 lb ft). Turn 270 ° counterclockwise. Tighten "2" to 15 Nm (11 lb ft). Turn 270 ° counterclockwise. Tighten "3" to 20 Nm (15 lb ft). Tighten "1" to 25 Nm (18 lb ft). Tighten "2" to 25 Nm (18 lb ft). Tighten the catalytic converter bracket bolts (4). Tighten 20 Nm (15 lb ft) Tighten the catalytic converter brace bolts (3). Tighten 20 Nm (15 lb ft) Tighten the catalytic support bolt (2). Tighten 22 Nm (16 lb ft)

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