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 .

Fig 1: Crankshaft Pulley Bolts
Courtesy of GENERAL MOTORS COMPANY
1. Install the 4 crankshaft pulley bolts (1).
Fig 2: Aligning Bores
Courtesy of GENERAL MOTORS COMPANY
NOTE:

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

Fig 3: Camshaft Fixing Tool
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2. Check if the bores (1) are aligned.

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

Fig 4: Crankshaft Pulley Bolts
Courtesy of GENERAL MOTORS COMPANY
3. Remove the 4 crankshaft pulley bolts (1).
Fig 5: Crankshaft Fixing Tool
Courtesy of GENERAL MOTORS COMPANY
4. Install the EN-51140  fixing tool (2).
5. Install the fixing pin into the engine block bore (1) and tighten the 2 bolts (3).
Fig 6: Timing Chain Tensioner And Pin
Courtesy of GENERAL MOTORS COMPANY
6. Tension the timing chain tensioner (1) in arrow direction.
7. Install the EN-50513  pin (2).
Fig 7: Timing Chain Tensioner Shoe And Bolt
Courtesy of GENERAL MOTORS COMPANY
8. Remove the timing chain tensioner shoe bolt (2).
9. Remove the timing chain tensioner shoe (1).
Fig 8: Timing Chain Lower Guide And Bolts
Courtesy of GENERAL MOTORS COMPANY
10. Remove the 2 timing chain lower guide bolts (2).
11. Remove the timing chain lower guide (1).
Fig 9: Timing Chain Upper Guide And Bolts
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12. 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.
Fig 10: Timing Chain
Courtesy of GENERAL MOTORS COMPANY
15. Remove the timing chain (1).
Fig 11: Timing Chain Upper Guide And Bolts
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16. Remove the upper timing chain upper guide bolt (2).
17. Remove the timing chain upper guide (1).