GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • EN 46101 Spark Plug Tube Seal Guide
    • EN 46105 Camshaft Locking Tool

    Object Number: 1832345  Size: SH
  1. Remove the EN 46105-2 from the rear of the left camshafts.

  2. Object Number: 1832346  Size: SH
  3. Install the EN 46101 onto the spark plug tubes of the left cylinder head.

  4. Object Number: 1864464  Size: SH
  5. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
  6. Wipe the camshaft cover sealing surface on the left cylinder head with a clean, lint-free cloth.

  7. Object Number: 1832348  Size: SH
  8. Place a bead 8 mm (0.3150 in) in diameter by 4 mm (0.1575 in) in height of RTV sealant, GM P/N 12378521 (Canadian P/N 88901148) or equivalent, on the engine front cover split lines (1).

  9. Object Number: 1864539  Size: SH
  10. Place the left camshaft cover into position onto the left cylinder head.

  11. Object Number: 1864540  Size: SH
  12. Loosely install the left camshaft cover bolts.
  13. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1993002  Size: SH
  14. Tighten the left camshaft cover bolts in the sequence shown.
  15. Tighten

    1. Tighten the left camshaft cover bolts in the sequence to 10 N·m (89 lb in).
    2. Tighten the left camshaft cover bolts a second pass in the sequence to 10 N·m (89 lb in).

    Object Number: 1864542  Size: SH
  16. Remove the EN 46101 from the spark plug tubes of the left cylinder head.

  17. Object Number: 1864416  Size: SH
  18. Install the NEW spark plugs into the left cylinder head.
  19. Tighten
    Tighten the spark plugs to 20 N·m (15 lb ft).


    Object Number: 1864415  Size: SH
  20. Install the ignition coils.

  21. Object Number: 1864414  Size: SH
  22. Install the ignition coil bolts.
  23. Tighten
    Tighten the ignition coil bolts to 10 N·m (89 lb in).