GM Service Manual Online
For 1990-2009 cars only

Tools Required

EN 46101 Spark Plug Tube Seal Guide

Removal Procedure

  1. Remove the upper intake manifold. Refer to Upper Intake Manifold Replacement .
  2. Remove the left side ignition coils. Refer to Ignition Coil Replacement - Bank 2 .
  3. Unclip and reposition wire harness from camshaft cover .

  4. Object Number: 902871  Size: SH
  5. Remove the left camshaft cover bolts.
  6. Remove the left camshaft cover from the left cylinder head.
  7. Clean the mating surfaces of the cylinder head and the camshaft cover. Refer to Camshaft Cover Cleaning and Inspection .

  8. Object Number: 1306485  Size: SH
  9. Install the EN 46101 onto the spark plug tubes of the left cylinder head.

Installation Procedure


    Object Number: 1306486  Size: SH
  1. Install new camshaft cover bolt grommets prior to installing the camshaft cover bolts.

  2. Object Number: 1306487  Size: SH
  3. 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).

  4. Object Number: 1306488  Size: SH
  5. Place the left camshaft cover into position onto the left cylinder head.

  6. Object Number: 1306489  Size: SH
  7. Loosely install the left camshaft cover bolts.
  8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1392433  Size: SH
  9. Tighten the left camshaft cover bolts in the sequence shown.
  10. Tighten
    Tighten the left camshaft cover bolts in the sequence to 10 N·m (89 lb in).


    Object Number: 1306490  Size: SH
  11. Remove the EN 46101 from the spark plug tubes of the left cylinder head.
  12. Position wire harness and clip to camshaft cover.
  13. Remove the left side ignition coils. Refer to Ignition Coil Replacement - Bank 2 .
  14. Remove the upper intake manifold. Refer to Upper Intake Manifold Replacement .