Subaru Forester 1998-05

Exhaust Manifold

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Due to the unique design of the Subaru engine an exhaust manifold is not used. The exhaust enters directly into the front Y-pipe.

General Information



Due to the unique design of the Subaru engine an exhaust manifold is not used. The exhaust enters directly into the front Y-pipe.

Removal & Installation





Click image to see an enlarged view

Fig. Exploded view of the exhaust system and related components


CAUTION
The exhaust pipe may be hot; DO NOT perform any work until the system has completely cooled.

  1. Before servicing the vehicle, refer to the Precautions section.
  2.  
  3. Remove or disconnect the following:

    Negative battery cable
     
    Front Oxygen (O2) sensor electrical connectors
     
    Rear Oxygen (O2) sensor electrical connectors
     
    Center exhaust pipe from front exhaust pipe
     
    Nuts that secure the exhaust pipe to the cylinder head
     
    Front pipe-to-front catalytic converter mounting nuts
     

  4.  
  5. Discard the gaskets.
  6.  

To install:

  1. Clean all gasket surfaces completely.
  2.  
  3. Install or connect the following:

    Catalytic converter to front exhaust pipe using new gasket. Torque the bolts to 22 ft. lbs. (30 Nm).
     
    Exhaust pipe to the cylinder head using new gaskets. Torque the mounting nuts to 22 ft. lbs. (30 Nm).
     
    Exhaust pipe to the center pipe using new gaskets. Torque the mounting nuts to 26 ft. lbs. (35 Nm).
     
    Rear O2sensors electrical connectors
     
    Front O2sensors electrical connectors
     
    Negative battery cable
     

  4.  
  5. Start the engine and check for exhaust leaks.
  6.  



Click image to see an enlarged view

Fig. Exhaust system and related components


CAUTION
The exhaust pipe may be hot; DO NOT perform any work until the system has completely cooled.

  1. Remove or disconnect the following:

    Negative battery cable
     
    Front Oxygen (O 2 ) sensor electrical connectors
     
    Rear Oxygen (O 2 ) sensor electrical connectors
     
    Center exhaust pipe from front exhaust pipe
     
    Nuts that secure the exhaust pipe to the cylinder head
     
    Front pipe-to-front catalytic converter mounting nuts
     

  2.  
  3. Discard the gaskets.
  4.  

To install:

  1. Clean all gasket surfaces completely.
  2.  
  3. Install or connect the following:

    Catalytic converter to front exhaust pipe using new gasket. Torque the bolts to 22 ft. lbs. (30 Nm).
     
    Exhaust pipe to the cylinder head using new gaskets. Torque the mounting nuts to 22 ft. lbs. (30 Nm).
     
    Exhaust pipe to the center pipe using new gaskets. Torque the mounting nuts to 26 ft. lbs. (35 Nm).
     
    Rear O 2 sensors electrical connectors
     
    Front O 2 sensors electrical connectors
     
    Negative battery cable
     

  4.  
  5. Start the engine and check for exhaust leaks.
  6.  

 
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