GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 2WD 🢒 Engine 🢒 Engine Mechanical - 4.2L 🢒 Engine Front Cover Replacement

Special Tools

J 44219 Cover Alignment Pins

Removal Procedure
  1. Drain the engine coolant. Refer to Cooling System Draining and Filling.
  2. Remove the cooling fan and the shroud. Refer to Cooling Fan and Shroud Replacement.
  3. Remove the drive belt. Refer to Drive Belt Replacement.
  4. Remove the water pump. Refer to Water Pump Replacement.
  5. Remove the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
  6. Remove the power steering pump. Refer to Power Steering Pump Replacement.
  7. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  8. Remove the oil pan. Refer to Oil Pan Replacement.
  9. Lower the vehicle.

    10. Object Number: 637779 Size: SH
  10. Remove the 7 mm center bolt (1).
  11. Loosen and remove the remaining engine front cover bolts.
  12. Place 2 of the front cover bolts in the jack screw holes on the front cover and tighten the bolts evenly to release the front cover from the engine.
  13. Remove the 2 bolts from the front cover.
  14. Remove the oil pump. Refer to Oil Pump Replacement.
  15. Clean and inspect the front cover. Refer to Engine Front Cover Cleaning and Inspection.

Installation Procedure

    Object Number: 760726 Size: SH
  1. Install the J 44219 onto the engine.

    2. Object Number: 637780 Size: SH

    Note: The engine front cover must be installed within 10 minutes from when the sealer was applied.

  2. Apply a 3 mm (0.12 in) bead of sealer to the trace grooves on back side of the engine front cover (1). Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.
  3. Also apply sealant on the inside 3 bolt hole bosses on the cover.
  4. Align the oil pump to the crankshaft sprocket splines.

    5. Object Number: 637779 Size: SH
  5. Install the front cover.

    6. Caution: Refer to Fastener Caution in the Preface section.

  6. Install the front cover bolts, tightening the center bolt (1) last. Tighten the front cover bolts to 10 N·m (89 lb in).
  7. Remove the J 44219 .
  8. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
  9. Install the oil pan. Refer to Oil Pan Replacement.
  10. Lower the vehicle.
  11. Install the power steering pump. Refer to Power Steering Pump Replacement.
  12. Install the crankshaft balancer. Refer to Crankshaft Balancer Replacement.
  13. Install the water pump. Refer to Water Pump Replacement.
  14. Install the drive belt. Refer to Drive Belt Replacement.
  15. Install the cooling fan and shroud. Refer to Cooling Fan and Shroud Replacement.
  16. Fill the engine with coolant. Refer to Cooling System Draining and Filling.