Tool Usage Information

Bearing, Expander, and Expander Driver Information

• 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 28.575-37.465 mm (1.125-1.475 in) and is used with the expander assembly and the small washer.
• Expander bearing driver number two inside diameter is 37.465-43.18 mm (1.475-1.7 in) and is used with number one expanding driver and the small washer.
• Expander bearing driver number three inside diameter is 43.18-48.895 mm (1.7-1.925 in) and is used with number two expanding driver and the large washer.
• Expander bearing driver number four inside diameter is 48.895-54.61 mm (1.925-2.15 in) and is used with number three expanding driver and the large washer.
• Expander bearing driver number five inside diameter is 54.61-60.325 mm (2.150-2.375 in) and is used with number four expanding driver and the large washer.
• Expander bearing driver number six inside diameter is 60.325-68.326 mm (2.375-2.69 in) and is used with number five expanding driver and the large washer.

Fig 1: View Of J 33049 Camshaft Bearing Service Kit Components

Courtesy of GENERAL MOTORS CORP.

Tool Assembly and Operation

1. Select the proper expanding driver and washer from the expanding driver and washer information.
IMPORTANT: To install or remove the expanding driver, always push on or pull from the ends.
Pressure on the outside diameter may cause a bind against the rubber expanding sleeve.
2. Place the expanding driver onto the expander assembly.
3. Check to insure that the separation lines between the segments of the expanding driver align with the separation lines of the expander assembly.
4. Place the guide cone over the driving bar, with the small end of the cone facing the driver assembly.
5. Place the driving washer over the threaded portion of the expander assembly.
6. 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.

7. 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.

8. Slide the nylon cone into the front or rear camshaft bearing. This will properly align the tool.
9. Drive the bearing out of or into the engine block.
Fig 2: View Of J 33049 Camshaft Bearing Tool & Nylon Cone
Courtesy of GENERAL MOTORS CORP.
10. Repeat the procedure for the additional inner bearings.
11. For the two end bearings, front and rear, remove the nylon cone and driver bar extension.
12. Drive the bearings out of or into the engine block.
Fig 3: Driving Bearing From/Into Block Bore
Courtesy of GENERAL MOTORS CORP.