GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Lower Crankcase Removal

    Object Number: 1564145 Size: SH
  1. Remove the 4 lower crankcase perimeter bolts along the left side of the engine.

    2. Object Number: 1564147 Size: SH
  2. Remove the 4 lower crankcase perimeter bolts along the right side of the engine.

    3. Object Number: 1564149 Size: SH
  3. Remove the oil manifold plate bolts.

    4. Object Number: 1564151 Size: SH
  4. Remove the main bearing bolts. Note the location of the single stud-end bolt (1) used to attach the oil pump pickup tube.

    5. Object Number: 1564153 Size: SH
  5. Remove the oil manifold plate.

    6. Object Number: 1564155 Size: SH

    Caution: Use a plastic pry tool when prying case halves apart to prevent damage to the Upper and Lower Crankcase surface. Do not continue to push the pry tool in the crankcase as the Upper and Lower Crankcase halves separate. This may damage the sealing surface.

  6. Working on either side of the lower crankcase, separate the crankcase halves by alternately prying in the grooves (1) provided until the lower crankcase is free of the dowel pins.

    7. Object Number: 204108 Size: SH
  7. Remove the lower crankcase.

    8. Object Number: 204159 Size: SH
  8. Remove and discard the upper-to-lower crankcase seals.