GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN 46109 Guide Pin Set
    • EN-47839 Crankshaft Rear Oil Seal Installation Tool
    • J 42183 Handle

    Object Number: 1306160  Size: SH
  1. Install the 6 mm (0.236 in) guides from the EN 46109 into the 2 crankshaft rear oil seal housing corner bolt holes of the engine block.

  2. Object Number: 1579293  Size: SH
  3. Install the EN-47839 with the J 42183  (1, 2) onto the rear of the crankshaft flange.

  4. Object Number: 1306170  Size: SH
  5. Place a 3 mm (0.118 in) bead of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, to the NEW crankshaft rear oil seal housing as shown (1).

  6. Object Number: 1579294  Size: SH

    Note: DO NOT allow any engine oil on the area where the crankshaft rear oil seal housing is to be installed.

  7. Install the crankshaft rear oil seal housing to the engine block.

  8. Object Number: 1581982  Size: SH
  9. Remove the EN 46109 6 mm (0.236 in) guides from the engine block.
  10. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1579295  Size: SH
  11. Install the crankshaft rear oil seal housing bolts.
  12. Tighten
    Tighten the crankshaft rear oil seal housing bolts to 10 N·m (89 lb in).


    Object Number: 1579296  Size: SH
  13. Remove the EN-47839 and J 42183  (1, 2) from the crankshaft flange.