Camshaft Timing Chain Removal

Special Tools

• EN-50513  Fixing Pin
• EN-51140  Crankshaft Fixing Tool
• EN-51143  Camshaft Sprocket Fixing Tool

For equivalent regional tools, refer to Special Tools .

1. Courtesy of GENERAL MOTORS COMPANY

   Install the 4 crankshaft pulley bolts (1).

2. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   If the bores not aligned turn the crankshaft at the crankshaft pulley bolts.

   Check if the bores (1) are aligned.

   Courtesy of GENERAL MOTORS COMPANY

   Turn the exhaust camshaft at the hexagon so far if the EN-51143  fixing tool (1) can be installed.

3. Courtesy of GENERAL MOTORS COMPANY

   Remove the 4 crankshaft pulley bolts (1).

4. Courtesy of GENERAL MOTORS COMPANY

   Install the EN-51140  fixing tool (2).

5. Install the fixing pin into the engine block bore (1) and tighten the 2 bolts (3).

6. Courtesy of GENERAL MOTORS COMPANY

   Tension the timing chain tensioner (1) in arrow direction.

7. Install the EN-50513  pin (2).

8. Courtesy of GENERAL MOTORS COMPANY

   Remove the timing chain tensioner shoe bolt (2).

9. Remove the timing chain tensioner shoe (1).

10. Courtesy of GENERAL MOTORS COMPANY

    Remove the 2 timing chain lower guide bolts (2).

11. Remove the timing chain lower guide (1).

12. Courtesy of GENERAL MOTORS COMPANY

    Loosen the timing chain upper guide bolt (1).

13. Remove the timing chain upper guide bolt (3).
14. Move the timing chain upper guide (2) in the direction of arrow.

15. Courtesy of GENERAL MOTORS COMPANY

    Remove the timing chain (1).

16. Courtesy of GENERAL MOTORS COMPANY

    Remove the upper timing chain upper guide bolt (2).

17. Remove the timing chain upper guide (1).