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

    Object Number: 1564247 Size: SH
  1. Remove the cylinder head core hole plugs located in the cylinder heads. Ensure the O-ring seal is on each access plug.

    2. Object Number: 1564248 Size: SH
  2. Remove the right secondary drive chain tensioner bolts.
  3. Remove the right secondary camshaft drive chain tensioner allowing it to expand as you remove it.

    4. Object Number: 1564249 Size: SH
  4. Remove the upper right secondary camshaft drive chain guide bolt.

    5. Caution: Refer to Torque Reaction Against Timing Drive Chain Caution in the Preface section.


    Object Number: 1564250 Size: SH
  5. Remove the camshaft sprocket bolts from the camshafts. Use an open wrench on the hex cast near the front of each camshaft to prevent engine rotation when loosening the camshaft sprocket bolts.
  6. Lift the secondary camshaft drive chain from the camshaft sprocket teeth and slide the camshaft sprockets off of the camshafts.

    7. Object Number: 685335 Size: SH
  7. Remove the right secondary camshaft drive chain.

    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. Object Number: 685347 Size: SH
  10. Remove the lower right secondary camshaft drive chain guide bolt.

    11. Object Number: 685348 Size: SH
  11. Remove the right secondary camshaft drive chain guide.