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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Engine Mechanical - 4.6L - 1 Of 4) >> On-Vehicle Repair Instructions (1 Of 2) >> Secondary Camshaft Drive Chain Guide Replacement - Left Side >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the left secondary camshaft drive chain tensioner. Refer to Secondary Camshaft Drive Chain Tensioner Replacement - Left Side .
  2. Remove the left camshaft cover. Refer to Camshaft Cover Replacement - Left Side .
    3. Fig 1: Ensuring Camshaft Sprocket Drive Pins Are At The Top Of Their Rotation
    GM517149Courtesy of GENERAL MOTORS CORP.
  3. Ensure both camshaft sprocket drive pins are at the top of their rotation.
    4. Fig 2: Using Camshaft Holding Tool
    GM650538Courtesy of GENERAL MOTORS CORP.
    CAUTION: Refer to CAMSHAFT HOLDING TOOL CAUTION .
  4. Install the J 44212  over the camshafts. See Special Tools .
    5. Fig 3: Securing Camshaft
    GM749358Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Torque Reaction Against Timing Drive Chain Notice .
  5. Use an open end wrench on the hex cast into the camshaft in order to prevent the camshaft from rotating when removing the camshaft sprocket bolt.
    6. Fig 4: Identifying Left Exhaust Camshaft Sprocket Bolt
    GM685360Courtesy of GENERAL MOTORS CORP.
  6. Remove the left exhaust camshaft sprocket bolt.
  7. Slide the left exhaust camshaft sprocket off of the camshaft and remove the left secondary drive chain from the camshaft sprocket teeth.
    8. Fig 5: Locating Camshaft Drive Chain Shoe Access Plugs On Front Of Engine
    GM748194Courtesy of GENERAL MOTORS CORP.
  8. Remove the left secondary camshaft drive chain guide access plug (4) located in the cylinder head. Ensure the O-ring seal remains attached to the access plug.
    9. Fig 6: Identifying Upper Left Secondary Camshaft Drive Chain Guide Bolt
    GM685354Courtesy of GENERAL MOTORS CORP.
  9. Remove the upper left secondary camshaft drive chain guide bolt.
    10. Fig 7: Identifying Lower Left Secondary Camshaft Drive Chain Guide Bolt
    GM685368Courtesy of GENERAL MOTORS CORP.
  10. Remove the lower left secondary camshaft drive chain guide bolt.
    11. Fig 8: Left Secondary Camshaft Drive Chain Guide
    GM685372Courtesy of GENERAL MOTORS CORP.
  11. Remove the left secondary camshaft drive chain guide.
  12. Clean and inspect the camshaft timing drive components. Refer to Camshaft Timing Drive Components Cleaning and Inspection .
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