CTS 2006-2007, CTS-V 2005-2007, DTS 2006-2007

Flywheel

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Removal & Installation



2.8L & 3.6L Engines
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the transmission.
  4.  
  5. Remove the engine flywheel bolts and the flywheel.
  6.  
  7. Clean and inspect the flywheel. If the flywheel teeth are damaged, inspect the starter for proper operation. Replace the starter if there is excessive wear or damage to the starter drive.
  8.  

To install:

  1. Place the engine flywheel in position on the crankshaft.
  2.  
  3. Install 2 NEW bolts in location at the top and bottom of the engine flywheel bolt pattern allowing the engine flywheel to hang in position.
  4.  
  5. Lock the crankshaft from turning.
  6.  
  7. Install the remaining NEW engine flywheel bolts.
  8.  
  9. Tighten the NEW engine flywheel bolts to 22 ft. lbs. (30 Nm), plus an additional 45 degrees.
  10.  

4.6L Engine
  1. Before servicing the vehicle, refer to the Precautions Section.
  2.  
  3. Remove the transaxle assembly.
  4.  
  5. Install the J 44214 flywheel holder.
  6.  
  7. Loosen the flywheel bolts.
  8.  
  9. Remove all but one of the flywheel bolts, leaving the one bolt at the top of the crankshaft.
  10.  
  11. Grasp the engine flywheel with one hand and remove the remaining bolt. Do not drop the engine flywheel when removing the final bolt.
  12.  
  13. Clean and inspect the engine flywheel.

    Click image to see an enlarged view

    Fig. Flywheel removal 4.6L engine

  14.  

To install:

  1. Apply sealant to the flywheel bolts.
  2.  
  3. Place the engine flywheel in position against the crankshaft.
  4.  
  5. Install the flywheel bolts.
  6.  
  7. Place the engine flywheel in position against the crankshaft.
  8.  
  9. Install the flywheel bolts and tighten as follows:
    1. Tighten the bolts a first pass to 22 ft. lbs. (30 Nm).
    2.  
    3. Tighten the bolts a final pass an additional 50 degrees using the J 45059 angle meter.
    4.  

  10.  
  11. Remove the J 44214 from the engine block.
  12.  
  13. Install the transaxle assembly.
  14.  

5.7L & 6.0L Engines

NOTE
For manual transmission applications, note the position and direction of the engine flywheel before removal. The flywheel does not use a locating pin for alignment. Mark or scribe the end of the crankshaft and the flywheel before component removal. The engine flywheel must be reinstalled to the original position and direction. The engine flywheel will not initially seat against the crankshaft flange, but will be pulled onto the crankshaft by the engine flywheel bolts. This procedure requires a 3-stage tightening process.

  1. Remove the transmission.
  2.  
  3. If equipped with manual transmission, remove the clutch assembly.
  4.  
  5. Mark or scribe the end of the crankshaft and the flywheel.
  6.  
  7. Remove the engine flywheel.
  8.  
  9. Note the position and location of the manual transmission flywheel balance weights, if applicable.
  10.  
  11. Clean and inspect the engine flywheel.
  12.  

To install:

Click image to see an enlarged view

Fig. Engine flywheel bolt tightening sequence-5.7L & 6.0L engines

  1. Align the mark or scribe on the crankshaft with the mark or scribe on the existing flywheel.
  2.  
  3. Install the engine flywheel.
  4.  
  5. Apply threadlock to the threads of the flywheel bolts.
  6.  
  7. Install the engine flywheel bolts and tighten in sequence as follows:
    1. First pass in sequence to 15 ft. lbs. (20 Nm).
    2.  
    3. Second pass in sequence to 37 ft. lbs. (50 Nm).
    4.  
    5. Final pass in sequence to 74 ft. lbs. (100 Nm).
    6.  

  8.  
  9. Install the clutch assembly, if equipped.
  10.  
  11. Install the transmission.
  12.  

 
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