GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Engine 🢒 Engine Mechanical - 4.6L 🢒 Secondary Camshaft Drive Chain Shoe Replacement - Right Side

Special Tools

J 44212 Camshaft Holding Tool

Removal Procedure
  1. Remove the right secondary camshaft drive chain tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Right Side.
  2. Remove the right camshaft cover. Refer to Camshaft Cover Replacement - Right Side.

    3. Object Number: 517164 Size: SH
  3. Ensure both camshaft sprocket drive pins are at the top of their rotation.

    4. Object Number: 650538 Size: SH

    Warning: The camshaft holding tools must be installed on the camshafts to prevent camshaft rotation. When performing service to the valve train and/or timing components, valve spring pressure can cause the camshafts to rotate unexpectedly and can cause personal injury.

  4. Install the J 44212 over the camshafts.

    5. Object Number: 749349 Size: SH
  5. Remove the mechanics wire (1) supporting the right secondary camshaft drive chain shoe (3).
  6. Remove the engine front cover bolt (2) from the front of the engine.

    7. Object Number: 748194 Size: SH
  7. Remove the right secondary camshaft drive chain shoe access plug (1) located in the cylinder head. Ensure the O-ring seal remains attached to the access plug.

    8. Object Number: 685338 Size: SH
  8. Remove the right secondary camshaft drive chain shoe bolt.

    9. Object Number: 685343 Size: SH
  9. Remove the right secondary camshaft drive chain shoe.
  10. Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection.

Installation Procedure

    Object Number: 685343 Size: SH
  1. Position the right secondary camshaft drive chain shoe in through the front cover area.

    2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 685338 Size: SH
  2. Install the right secondary camshaft drive chain shoe bolt.

    3. Tighten
    Tighten the secondary camshaft drive chain shoe bolt to 25 N·m (18 lb ft).


    Object Number: 748194 Size: SH
  3. Install the right secondary camshaft drive chain shoe access plug (1) located in the cylinder head. Ensure the O-ring seal is attached to the access plug.

    4. Tighten
    Tighten the secondary camshaft drive chain shoe access plug to 4.5 N·m (40 lb in).

  4. Install the right secondary camshaft drive chain tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Right Side.

    5. Object Number: 650538 Size: SH
  5. Remove the J 44212 from the camshafts.
  6. Install the right camshaft cover. Refer to Camshaft Cover Replacement - Right Side.