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

For equivalent regional tools, refer to Special Tools.


    Object Number: 1306160  Size: SH
  1. Install the 6 mm (0.236 in) guides from the EN-46109 pin set 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 tool with the J-42183 handle  (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 pin set 6 mm (0.236 in) guides from the engine block.

  10. Object Number: 1579295  Size: SH
  11. Install the crankshaft rear oil seal housing bolts.
  12. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1992542  Size: SH
  13. Tighten the crankshaft rear oil seal housing bolts in sequence and tighten to 10 N·m (89 lb in).

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