GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN-46109 Engine Front Cover Installation Guide Pins

Removal Procedure

    Warning: Refer to Battery Disconnect Warning in the Preface section.


    Object Number: 1801575  Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the exhaust front pipe. Refer to Front Pipe Replacement.
  3. Disconnect the oil level sensor connector.
  4. Remove the oil filler cap for the proper oil draining.

  5. Object Number: 1801554  Size: SH
  6. Remove the oil pan drain plug and drain the oil into a suitable container.
  7. Remove the oil pan flange-to-transaxle retaining bolts.

  8. Object Number: 1801579  Size: SH
  9. Remove the transfer case mounting bracket retaining bolts.
  10. Remove the two long bolts (12 and 13) attaching the rear of the oil pan to the crankshaft rear oil seal housing.
  11. Remove the 11 bolts attaching the oil pan to the cylinder block.
  12. Using the shear points located at the edge of the oil pan shear the RTV sealant.
  13. Remove the oil pan from the cylinder block.

Installation Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1801593  Size: SH
  1. Install the guide pins, EN-46109 pins  (1) into the oil pan rail bolt hole on each side of the engine block.

  2. Object Number: 1801594  Size: SH
  3. Place a 3 mm bead (1) of RTV sealant on the cylinder block pan rail and crankshaft rear oil seal housing to oil pan mating surfaces.
  4. Position the oil pan onto the cylinder block.
  5. Remove the guide pins, EN-46109 pins from the cylinder block.

  6. Object Number: 1801579  Size: SH
  7. Loosely install the oil pan bolts.
  8. Install the oil pan bolts in the sequence shown to.
  9. • The oil pan to cylinder block attaching bolt to 23 N·m (17 lb ft).
    • The oil pan to crankshaft rear oil seal housing attaching bolt (12-13) to 10 N·m (89 lb in).

    Object Number: 1801554  Size: SH
  10. Install the oil pan flange-to-transaxle retaining bolts and tighten to 50 N·m (37 lb ft).
  11. Install the transfer case mounting bracket retaining bolts.

  12. Object Number: 1801575  Size: SH
  13. Install the oil pan drain plug and tighten to 25 N·m (18 lb ft).
  14. Install the exhaust front pipe. Refer to Front Pipe Replacement.
  15. Fill the oil pan with engine oil.