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

Camshaft, Bearings & Lifters

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Bearing Replacement



5.7L & 6.0L Engines

WARNING
Wear safety glasses in order to avoid eye damage.


NOTE
A loose camshaft bearing may be caused by an enlarged, out of round or damaged engine block bearing bore.

  1. Prior to bearing removal, inspect the camshaft bearings for loose fit in the engine block bearing bores.
  2.  
  3. Repair or replace the components as required.
  4.  
  5. Select the expanding driver (4-8) and washer (2 or 3) from the tool usage information.

    Click image to see an enlarged view

    Fig. J 33049 Camshaft Bearing Service Set

  6.  
  7. Assemble the J 33049.
  8.  
  9. Insert the tool through the front of the engine block and into the bearing.
  10.  
  11. Tighten the expander assembly (15) nut until snug.
  12.  
  13. Push the guide cone (1) into the front camshaft bearing to align the tool.
  14.  
  15. Drive the bearing from the block bore.
    NOTE
    To remove the front camshaft bearing, operate the tool from the rear of the block using the guide cone in the rear camshaft bearing bore.



    Click image to see an enlarged view

    Fig. Driving the bearing from the block bore

  16.  
  17. Repeat the above procedures to remove the remaining bearings.
  18.  

To install:

Tool usage information is as follows:



The tool consists of a guide cone (1), driving washers (2 or 3), expander bearing drivers (4-8), driver bars (9 or 10), expander jaws (11), expander sleeve (12), expander cone (13), expander shaft (14), and expander assembly (15).
 
Expander bearing driver number one inside diameter is 1.125-1.475 inch (28.575-37.465 mm) and is used with the expander assembly and the small washer.
 
Expander bearing driver number 2 inside diameter is 1.475-1.7 inch (37.465-43.18 mm) and is used with number 1 expanding driver and the small washer.
 
Expander bearing driver number 3 inside diameter is 1.7-1.925 inch (43.18-48.895 mm) and is used with number 2 expanding driver and the large washer.
 
Expander bearing driver number 4 inside diameter is 1.925-2.15 inch (48.895-54.61 mm) and is used with number 3 expanding driver and the large washer.
 
Expander bearing driver number 5 inside diameter is 2.15-2.375 inch (54.61-60.325 mm) and is used with number 4 expanding driver and the large washer.
 
Expander bearing driver number 6 inside diameter is 2.375-2.69 inch (60.325-68.326 mm) and is used with number 5 expanding driver and the large washer.
 

  1. Select the proper expanding driver and washer from the expanding driver and washer information.
  2.  
  3. Place the expanding driver onto the expander assembly.
  4.  
  5. Check to ensure that the separation lines between the segments of the expanding driver align with the separation lines of the expander assembly.
  6.  
  7. Place the guide cone over the driving bar, with the small end of the cone facing the driver assembly.
  8.  
  9. Place the driving washer over the threaded portion of the expander assembly.
  10.  
  11. Screw the expander assembly, with driving washer, onto the driving bar. It may be necessary to install the driver bar extension for removal of the inner bearings.
  12.  
  13. Insert the tool into a inner camshaft bearing and tighten until snug. Operate the tool from the front or rear of the engine block. On some engine blocks, the nut on the expander assembly is inaccessible except from either end. In this case you must use a socket and extension to enlarge and reduce the expander assembly.
  14.  
  15. Slide the nylon cone into the front or rear camshaft bearing. This will properly align the tool.
  16.  
  17. Drive the bearing out of or into the engine block.
  18.  
  19. Repeat the procedure for the additional inner bearings.

    Click image to see an enlarged view

    Fig. Bearing installation into block with tools shown

  20.  
  21. For the 2 end bearings, front and rear, remove the nylon cone and driver bar extension.
  22.  
  23. Drive the bearings out of or into the engine block.

    Click image to see an enlarged view

    Fig. Driving the bearing into the block bore

  24.  

 
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