GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Mechanical - 4.3L 🢒 Engine Front Cover Installation

    Object Number: 480539 Size: SH

    Important: Once the composite engine front cover is removed DO NOT reinstall the engine front cover. Always install a NEW engine front cover.

  1. Install the NEW engine front cover.

    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 engine front cover bolts.

    3. Tighten
    Tighten the bolts to 12 N·m (106 lb in).


    Object Number: 387759 Size: SH

    Important: DO NOT reuse the original crankshaft position sensor seal, O-ring. When installing the crankshaft position sensor be sure the crankshaft position sensor is fully seated and held stationary in the engine front cover crankshaft position sensor bore. A crankshaft position sensor that is not completely seated will cock in the engine front cover and may result in erratic engine operation.

  3. Lubricate the NEW crankshaft position sensor seal, O-ring, with clean engine oil.
  4. Install the NEW crankshaft position sensor seal, O-ring, onto the crankshaft position sensor.

    5. Object Number: 11485 Size: SH
  5. Install crankshaft position sensor until fully seated into the engine front cover.
  6. Install crankshaft position sensor bolt.

    7. Tighten
    Tighten the crankshaft position sensor bolt to 8 N·m (71 lb in).