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Chevrolet Sonic Repair Manual: Camshaft Timing Chain Replacement

Chevrolet Sonic Repair Manual / Powertrain / Engine / Valvetrain / Valvetrain Timing / Camshaft Timing Chain Replacement

Special Tools

EN-955 Locking Pin

For equivalent regional tools. Refer to Special Tools.

Removal Procedure
  1. Remove the engine front cover. Refer to Engine Front Cover with Oil Pump Replacement.


    2. Note:

    If EN-955 fixing pin can not be inserted, compress the timing chain tensioner further with the aid of a flat bladed tool to allow complete insertion of the pin.

  2. Push the timing chain (2) in direction to the timing chain tensioner (1) and install the EN-955 pin (3).


  3. Remove the two upper timing chain guide bolts (1).
  4. Remove the upper timing chain guide (2).

  5. Remove the two timing chain guide right side bolts (2).
  6. Remove the timing chain guide right side (1).
    7. ii0/
  7. Remove the timing chain tensioner shoe bolt (2).
  8. Remove the timing chain tensioner shoe (1).

  9. Remove the timing chain (1) and crankshaft sprocket (2) together as a unit.

  10. Remove the engine front cover gasket (1).
Installation Procedure
  1. Clean the engine front cover sealing surfaces on engine block and cylinder head.

  2. Apply a 2 mm (0.0787 in) bead of RTV sealant the areas shown above (1, 2).

  3. Install the engine front cover gasket (1).

  4. Install the two upper timing chain guide bolts (1) and tighten to 8 N•m (71 lb in).
  5. Install the upper timing chain guide (2).

  6. Install the timing chain (1) and crankshaft sprocket (2) together as a unit.
    7. ii0/
  7. Install the timing chain tensioner shoe (1).

    8. Caution:

    Refer to Fastener Caution.

  8. Install the timing chain tensioner shoe bolt (2) and tighten to 20 Y (15 lb ft)

    .



  9. Install the timing chain guide right side (1).
  10. Install the timing chain guide right side bolts (2) and tighten to 8 Y (71 lb in)

    .



  11. Push the timing chain (2) in direction of the timing chain tensioner (1) and remove EN-955 pin (3).
  12. Install the engine front cover. Refer to Engine Front Cover with Oil Pump Replacement.
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