Crossfire 2006-2008

Camshaft, Bearings & Lifters

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Inspection



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the camshaft from the engine.
  4.  
  5. Inspect the camshaft bearing journals for damage or binding.
    NOTE
    If the journals are binding, check the cylinder head for damage. Also check the cylinder head oil holes for clogging.

  6.  
  7. Check the camshaft lobe and bearing surfaces for wear and damage. Replace as required.
  8.  
  9. Measure the lobe actual wear and replace the camshaft if it is out of limit. The standard value is 0.001 inch (0.0254 mm). The wear limit is 0.010 inch (0.254 mm).
  10.  

Removal & Installation



  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Disconnect battery negative cable from battery and properly isolate to prevent accidental reconnection.
  4.  
  5. Remove the cylinder head covers.
    NOTE
    Rotate engine at the crankshaft in running direction until scribe mark 40° on pulley/vibration damper corresponds with scribe mark on timing chain cover. Grooves in the camshafts must be toward the inside of the wedge.

  6.  
  7. Position the engine timing at 40° ATDC.

    Click image to see an enlarged view

    Fig. Crankshaft timing mark set to 40 degrees ATDC

  8.  
  9. Using Special Tools 9104 (1) and 9105 Camshaft Locating Plates, lock the camshafts by placing the tool flush on the cylinder head, and inserting it into the groove in the camshaft.

    Click image to see an enlarged view

    Fig. Camshaft locking plate

  10.  
  11. Remove the timing chain tensioner (1).

    Click image to see an enlarged view

    Fig. Removing timing chain tensioner

  12.  
  13. Use a cable tie (1) to secure the timing chains to the camshaft sprockets.

    Click image to see an enlarged view

    Fig. Securing timing chain to camshaft sprocket

  14.  
  15. Remove the camshaft sprocket bolt (1) and sprocket.
  16.  
  17. Partially loosen the bolts in the sequence shown.

    Click image to see an enlarged view

    Fig. Camshaft bearing cap bolt removal sequence

  18.  
  19. Loosen and remove the bearing bridge bolts in the sequence shown. Remove the camshaft bearing bridges.
  20.  
  21. Remove the camshaft (1).
  22.  

To install:

  1. Position the camshaft on the cylinder head.
  2.  
  3. Install the camshaft bearing bridges.
  4.  
  5. Make sure the engine is at 40° ATDC.
  6.  
  7. Position the camshaft bearing bridge on the camshaft.
  8.  
  9. Using Special Tools 9104 and 9105 Camshaft Locating Plates, lock the camshafts by placing the tool flush on the cylinder head, and inserting it into the groove in the camshaft.
  10.  
  11. Install, but do not tighten the bearing bridge bolts.
  12.  
  13. Tighten the M7 45 (short) bolts to 11 ft. lbs. (15 N·m) and the M7 84 (long) bolts to 8 ft. lbs. (10 N·m) in the sequence shown.

    Click image to see an enlarged view

    Fig. Camshaft bearing cap bolt torque sequence

  14.  
  15. Continue to tighten only the M7 84 (long) bolts in the sequence shown an additional 90° clockwise. Skipping M7 45 bolts (short bolts) this time.
  16.  
  17. Install the camshaft sprockets and bolts. Tighten the bolts to 37 ft. lbs. (50 N·m).
  18.  
  19. Tighten the camshaft sprocket bolts and additional 90° clockwise.
  20.  
  21. Install the timing chain tensioner. Tighten the tensioner to 59 ft. lbs. (80 N·m).
  22.  
  23. Remove the cable tie.
  24.  
  25. Remove the Special Tools 9104 and 9105 Camshaft Locating Plates.
  26.  
  27. Install the cylinder head covers.
  28.  

 
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