GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1998 🢒 S/T Isuzu - 2WD 🢒 Engine 🢒 Engine Exhaust 🢒 Exhaust Manifold Replacement

Removal Procedure

    Object Number: 38205 Size: SH

    Caution: Before servicing any electrical component, the ignition and start switch must be in the OFF or LOCK position and all electrical loads must be OFF, unless instructed otherwise in these procedures. If a tool or equipment could easily come in contact with a live exposed electrical terminal, also disconnect the negative battery cable. Failure to follow these precautions may cause personal injury and/or damage to the vehicle or its components.

  1. Disconnect the battery negative cable.

    2. Object Number: 177620 Size: SH
  2. Remove the drive belt.

    3. Refer to Drive Belt Replacement


    Object Number: 199003 Size: SH

    Important: Do not evacuate the air conditioning system.

  3. Remove the air conditioning compressor, if equipped, and set it aside.

    4. Refer to Compressor Replacement in HVAC.


    Object Number: 199010 Size: SH
  4. Remove the power steering pump and set it aside, using the following procedure:
    5. 4.1. Two nuts from the cylinder head studs
    4.2. One bolt from the accessory bracket
    4.3. Three bolts from the front of the power steering pump

    Object Number: 42940 Size: SH
  5. Remove the exhaust pipe from the exhaust manifold.

    6. Refer to General Exhaust System Replacement .


    Object Number: 175480 Size: SH
  6. Remove the oil level indicator tube.

    7. Refer to Oil Level Indicator and Tube Replacement .


    Object Number: 182878 Size: SH
  7. Disconnect the oxygen sensor electrical connection.
  8. Remove the exhaust manifold and the gasket.

    9. Exhaust Manifold Removal .

  9. Clean all sealing surfaces.

    10. Refer to Exhaust Manifold Cleaning and Inspection .

Installation Procedure

    Object Number: 182878 Size: SH
  1. Install the exhaust manifold.

    2. Refer to Exhaust Manifold Installation .

  2. Connect the oxygen sensor electrical connector.

    3. Object Number: 175480 Size: SH
  3. Install the oil level indicator tube.

    4. Refer to Oil Level Indicator and Tube Replacement .


    Object Number: 42940 Size: SH
  4. Install the exhaust pipe to the exhaust manifold.

    5. Refer to General Exhaust System Replacement .


    Object Number: 199010 Size: SH
  5. Install the power steering pump to the mounting bracket.

    6. Tighten
    Tighten the bolts and nuts in the following sequence:

    5.1. Tighten the three bolts to 30 N·m (22 lb ft)
    5.2. Tighten the two nuts to 50 N·m (37 lb ft)
    5.3. Tighten the lower bolt to 50 N·m (37 lb ft)

    Object Number: 199003 Size: SH
  6. Install the air conditioning compressor, if equipped.

    7. Refer to Compressor Replacement in HVAC.


    Object Number: 177620 Size: SH
  7. Install the drive belt.

    8. Refer to Drive Belt Replacement

  8. Connect the battery negative cable.