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

    Object Number: 685353 Size: SH
  1. Remove the left secondary camshaft drive chain tensioner bolts.
  2. Remove the left secondary camshaft drive chain tensioner allowing it to expand as you remove it.

    3. Object Number: 685354 Size: SH
  3. Remove the upper left secondary camshaft drive chain guide bolt.

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


    Object Number: 1207121 Size: SH
  4. 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.
  5. Lift the secondary camshaft drive chain from the camshaft sprocket teeth and slide the camshaft sprockets off of the camshafts.

    6. Object Number: 685362 Size: SH
  6. Remove the left secondary drive chain.

    7. Object Number: 685364 Size: SH
  7. Remove the left secondary camshaft drive chain shoe bolt.

    8. Object Number: 685367 Size: SH
  8. Remove the left secondary camshaft drive chain shoe.

    9. Object Number: 685368 Size: SH
  9. Remove the lower left secondary camshaft drive chain guide bolt.

    10. Object Number: 685372 Size: SH
  10. Remove the left secondary camshaft drive chain guide.