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For 1990-2009 cars only

Tools Required

EN 46101 Spark Plug Tube Seal Guide


    Object Number: 1836418  Size: SH
  1. Install the EN 46101 onto the spark plug tubes of the right cylinder head.

  2. Object Number: 1836419  Size: SH
  3. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
  4. Wipe the camshaft cover sealing surface on the right cylinder head with a clean, lint-free cloth.

  5. Object Number: 1836422  Size: SH
  6. 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).

  7. Object Number: 1836426  Size: SH
  8. Place the right camshaft cover into position onto the right cylinder head.

  9. Object Number: 1864544  Size: SH
  10. Loosely install the right camshaft cover bolts.
  11. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1864545  Size: SH
  12. Tighten the right camshaft cover bolts in the sequence shown.
  13. Tighten
    Tighten the right camshaft cover bolts in the sequence to 10 N·m (89 lb in).


    Object Number: 1864548  Size: SH
  14. Remove the EN 46101 from the spark plug tubes of the right cylinder head.

  15. Object Number: 1864427  Size: SH
  16. Install the NEW spark plugs into the right cylinder head.
  17. Tighten
    Tighten the spark plugs to 20 N·m (15 lb ft).


    Object Number: 1864424  Size: SH
  18. Install the ignition coils.

  19. Object Number: 1864421  Size: SH
  20. Install the ignition coil bolts.
  21. Tighten
    Tighten the ignition coil bolt to 10 N·m (89 lb in).

Special Tools

EN 46101 Spark Plug Tube Seal Guide EN 46101

For equivalent regional tools, refer to Special Tools.


    Object Number: 1836418  Size: SH
  1. Install the EN 46101 guide onto the spark plug tubes of the right cylinder head.

  2. Object Number: 1836419  Size: SH
  3. Install the NEW camshaft cover bolt grommets prior to installing the camshaft cover bolts.
  4. Wipe the camshaft cover sealing surface on the right cylinder head with a clean, lint-free cloth.

  5. Object Number: 1836422  Size: SH
  6. 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).

  7. Object Number: 1836426  Size: SH
  8. Place the right camshaft cover into position onto the right cylinder head.

  9. Object Number: 1864544  Size: SH
  10. Loosely install the right camshaft cover bolts.
  11. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1864545  Size: SH
  12. Tighten the right camshaft cover bolts in the sequence shown and tighten to 10 N·m (89 lb in).

  13. Object Number: 1864548  Size: SH
  14. Remove the EN 46101 guide from the spark plug tubes of the right cylinder head.

  15. Object Number: 1864427  Size: SH
  16. Install the NEW spark plugs into the right cylinder head and tighten to 20 N·m (15 lb ft).

  17. Object Number: 1864424  Size: SH
  18. Install the ignition coils.

  19. Object Number: 1864421  Size: SH
  20. Install the ignition coil bolts and tighten to 10 N·m (89 lb in).