GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1997 🢒 Corvette 🢒 Engine 🢒 Engine Exhaust 🢒 Intermediate Pipe

Removal Procedure

    Object Number: 74059 Size: SH
  1. Disconnect the negative battery cable. Refer to

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

    in General Information.
  2. Raise the vehicle and support. Refer to Lifting and Jacking the Vehicle in General Information.

    3. Object Number: 53685 Size: SH
  3. Disconnect the HO2S connectors.

    4. Object Number: 64015 Size: SH
  4. Remove the takedown pipe flange nuts.

    5. Object Number: 64013 Size: SH
  5. Remove the intermediate pipe-to-rear pipe bolts.

    6. Object Number: 64016 Size: SH
  6. Remove the front exhaust hanger bolts from the takedown pipe bracket.

    7. Object Number: 64010 Size: SH
  7. Remove the rear exhaust hanger bolts from the rear intermediate exhaust pipes.

    8. Object Number: 67889 Size: SH
  8. Remove the intermediate pipe assembly.
  9. Remove the rear HO2S from the intermediate pipe.

Installation Procedure
  1. Coat the threads of the heated oxygen sensor with anti-sieze compound P/N 5613695, or equivalent if necessary.
  2. Install the rear HO2S to the intermediate pipe.

    3. Tighten
    Tighten the HO2S to 41 N·m (30 lb ft).


    Object Number: 67889 Size: SH
  3. Install the intermediate pipe assembly.
  4. Handstart the following exhaust system bolts:
    5. • The rear exhaust hanger bolts
    • The exhaust manifold-to-takedown pipe bolts
    • The intermediate exhaust pipe to the rear intermediate exhaust pipe bolts
    • The front exhaust hanger bolts
  5. Inspect the alignment of the exhaust system. Refer to Exhaust System Clearances .
  6. Tighten the exhaust system bolts starting at the rear and ending with the front exhaust hanger.

    7. Tighten

    1. Tighten the intermediate exhaust pipe to rear exhaust pipe bolts to 50 N·m (37 lb ft).
    2. Tighten the rear exhaust hanger bolts to 50 N·m (37 lb ft).
    3. Tighten the exhaust manifold-to-takedown pipe nuts to 20 N·m (15 lb ft).
    4. Tighten the front exhaust hanger bolts to 50 N·m (37 lb ft).

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.


    Object Number: 53685 Size: SH
  7. Connect the HO2S connectors.
  8. Lower the vehicle.
  9. Connect the negative battery cable.

    10. Tighten
    Tighten the negative battery cable bolt to 15 N·m (11 lb ft).