GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN 46101 Spark Plug Tube Seal Guide

Removal Procedure

  1. Remove the upper intake manifold. Refer to Upper Intake Manifold Replacement .
  2. Remove the lower intake manifold. Refer to Lower Intake Manifold Replacement
  3. Remove the right bank spark plugs. Refer to Spark Plug Replacement .
  4. Unbolt the power steering reservoir and position aside. Refer to Remote Power Steering Fluid Reservoir Replacement .

  5. Object Number: 902873  Size: SH
  6. Remove the right camshaft cover bolts.
  7. Remove the right camshaft cover from the right cylinder head.
  8. Clean the mating surfaces of the cylinder head and the camshaft cover. Refer to Camshaft Cover Cleaning and Inspection .

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

Installation Procedure


    Object Number: 1306494  Size: SH
  1. Install new camshaft cover bolt grommets prior to installing the camshaft cover bolts.

  2. Object Number: 1306495  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: 1306496  Size: SH
  5. Place the right camshaft cover into position onto the right cylinder head.

  6. Object Number: 1306497  Size: SH
  7. Loosely install the right camshaft cover bolts.
  8. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1392434  Size: SH
  9. Tighten the right camshaft cover bolts in the sequence shown.
  10. Tighten
    Tighten the right camshaft cover bolts in the sequence to 10 N·m (89 lb in).

  11. Install the power steering reservoir. Refer to Remote Power Steering Fluid Reservoir Replacement .

  12. Object Number: 1306498  Size: SH
  13. Remove the EN 46101 from the spark plug tubes of the right cylinder head.
  14. Install NEW spark plugs into the right cylinder head. Refer to Spark Plug Replacement .
  15. Install the lower intake manifold. Refer to Lower Intake Manifold Replacement
  16. Install the upper intake manifold. Refer to Upper Intake Manifold Replacement .