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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Engine Mechanical - 4.6L (3 Of 5)) >> Off-Vehicle Repair Instructions (1 Of 3) >> Secondary Camshaft Drive Chain Removal - Left Side

Secondary Camshaft Drive Chain Removal - Left Side

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Left Secondary Camshaft Drive Chain Tensioner to Engine Block Bolts
    GM685353Courtesy of GENERAL MOTORS CORP.
  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. Fig 2: Identifying Upper Left Secondary Camshaft Drive Chain Guide Bolt
    GM685354Courtesy of GENERAL MOTORS CORP.
  3. Remove the upper left secondary camshaft drive chain guide bolt.
    4. Fig 3: Securing Camshaft
    GM1207121Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice in Cautions and Notices.
  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. Fig 4: View of Left Secondary Camshaft Drive Chain
    GM685362Courtesy of GENERAL MOTORS CORP.
  6. Remove the left secondary drive chain.
    7. Fig 5: Identifying Left Secondary Camshaft Drive Chain Shoe Bolt
    GM685364Courtesy of GENERAL MOTORS CORP.
  7. Remove the left secondary camshaft drive chain shoe bolt.
    8. Fig 6: View of Left Secondary Camshaft Drive Chain Shoe
    GM685367Courtesy of GENERAL MOTORS CORP.
  8. Remove the left secondary camshaft drive chain shoe.
    9. Fig 7: Identifying Lower Left Secondary Camshaft Drive Chain Guide Bolt
    GM685368Courtesy of GENERAL MOTORS CORP.
  9. Remove the lower left secondary camshaft drive chain guide bolt.
    10. Fig 8: Left Secondary Camshaft Drive Chain Guide
    GM685372Courtesy of GENERAL MOTORS CORP.
  10. Remove the left secondary camshaft drive chain guide.
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