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Home >> Chevrolet >> 2018 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Engine Mechanical - 1.4L (LV7) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Camshaft Timing Chain Replacement (LV7) >> Removal Procedure

Removal Procedure

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  1. Remove the camshaft cover. Refer to Camshaft Cover Replacement (LV7) .
  2. Adjust the engine to cylinder 1 top dead center (TDC) of combustion stroke. Set crankshaft in direction of engine rotation until the markings (1, 2) line up. Rotate at the crankshaft balancer bolt (3).
    Fig 1: Crankshaft Balancer Markings
    GM3682494Courtesy of GENERAL MOTORS COMPANY
  3. Install the EN-51632  holder (1).
    Fig 2: Camshaft Locking Tool
    GM4230624Courtesy of GENERAL MOTORS COMPANY
  4. Remove the engine front cover. Refer to Engine Front Cover Replacement (LV7) .
  5. Remove the timing chain upper guide. Refer to Timing Chain Upper Guide Replacement .
  6. The engine has one of the two tensioner designs (1, 2). Each design has a different release mechanism and position.
    Fig 3: Tensioner Designs
    GM4091101Courtesy of GENERAL MOTORS COMPANY
  7. Fix the timing chain tensioner with design 1 (1) in service position:
    Fig 4: Timing Chain Tensioner In Service Position
    GM3689091Courtesy of GENERAL MOTORS COMPANY
    1. Slightly release tension from the piston (2) until bar (1) can be unlocked by rotating the lever (3) in direction of arrow.
      Fig 5: Releasing Tension From Piston
      GM3903235Courtesy of GENERAL MOTORS COMPANY
    2. Entirely push back the piston (1) until the tensioner lever (2) cannot be locked in this position.
      Fig 6: Pushing Back Piston
      GM3936517Courtesy of GENERAL MOTORS COMPANY
    3. Release tension from the piston (1) until it releases for three ratchets. The three ratchets can be noticed by the click noises.
      Fig 7: Piston
      GM3936518Courtesy of GENERAL MOTORS COMPANY
    4. Apply tension to the piston until the lever (1) is rotated back into the locking position where the bore in the lever aligns with the bore in the tensioner housing.
      Fig 8: Lever And Fixing Pin
      GM3936519Courtesy of GENERAL MOTORS COMPANY
    5. Fix the lever in this position with a suitable fixing pin (2).
    6. The style of tensioner design 2 (1) can be released by using a punch and pressing on the release clip (2).
      Fig 9: Tensioner Design 2
      GM4091102Courtesy of GENERAL MOTORS COMPANY
    7. Secure the timing chain tensioner with suitable sized drill bit (3).
  8. Remove the timing chain tensioner shoe bolt (1).
    Fig 10: Timing Chain Tensioner Shoe Fastener
    GM3977663Courtesy of GENERAL MOTORS COMPANY
  9. Remove the timing chain tensioner shoe (2).
  10. Ensure the correct fixation of the tool (3).
    Fig 11: Timing Chain Tensioner Tool, Timing Chain Tensioner, Bolts And Gasket
    GM3689090Courtesy of GENERAL MOTORS COMPANY
  11. Remove the 2 timing chain tensioner bolt (4).
  12. Remove the timing chain tensioner (1).
  13. Remove and DISCARD the gasket (2).
  14. Remove the timing chain (1).
    Fig 12: Timing Chain
    GM3977678Courtesy of GENERAL MOTORS COMPANY