GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2002 🢒 Isuzu T-Series (Truck Line C) 🢒 General Information 🢒 General Information 🢒 Valve Rocker Arm, Shaft, and Push Rod Replacement

Removal Procedure
  1. Tilt the cab. Refer to Cab Tilting in General Information.

    2. 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.

  2. Disconnect the negative battery cable.
  3. Remove the air inlet pipes. Refer to Intake air pipe replacement.
  4. Remove the Valve Rocker Arm Cover. Refer to Valve Rocker Arm Cover Replacement .
  5. Remove the fuel injector harness assembly.

    6. Object Number: 736642 Size: SH
  6. Loosen all the valve adjusters, but do not remove.
  7. Loosen the valve rocker arm shaft bracket bolts evenly, starting from the outer bolts moving to the inner bolts.

    8. Important: Do not remove the rocker arm shaft bolts from the valve rocker arm shaft assembly until the assembly is removed from the vehicle. Place on a work bench before disassembling.

  8. Remove the valve rocker arm shaft assembly.
  9. Remove the valve rocker arm retaining bolt.
  10. Remove the valve rocker arm.

Installation Procedure

    Object Number: 736642 Size: SH
  1. Install the valve rocker arm on the valve rocker arm shaft.

    2. 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.

  2. Install the valve rocker arm retaining bolt.

    3. Tighten
    Tighten the valve rocker arm retaining bolt to 27 N·m (20 lb ft).

  3. Install the valve rocker arm shaft assembly to the cylinder head.

    4. Tighten
    Tighten the valve rocker arm shaft bracket bolts to:

    • M8 Bolts to 27.5 N·m (20 lb ft)
    • M10 Bolts to 56 N·m (41 lb ft)
  4. Adjust the valve rocker arms. Refer to Valve Adjustment in Unit Repair.
  5. Install the fuel injector harness.
  6. Install the fuel injector harness bolts.

    7. Tighten
    Tighten the fuel injector harness bolts to 21 N·m (16 lb ft).

  7. Install the valve rocker arm cover. Refer to Valve Rocker Arm Cover Replacement .
  8. Install the Intake air ducts.
  9. Install the negative battery cable.
  10. Lower the cab.