GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 5825-A Crankshaft Gear Remover

For equivalent regional tools, refer to Special Tools.


    Object Number: 1883511  Size: SH
  1. Remove the crankshaft position sensor reluctor ring.

  2. Object Number: 1312893  Size: SH
  3. Remove the timing chain tensioner shoe (229) using a downward motion.
  4. Remove the timing chain tensioner bracket bolt and bracket (227 and 228).

  5. Object Number: 1883512  Size: SH
  6. Check the camshaft timing chain free play.
  7. 4.1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (2).
    4.2. Measure the free play on the slack side (3) of the camshaft timing chain.

    If the camshaft timing chain can be moved side to side in excess of 11 mm (0.43 in), dimension a, replacement of the camshaft timing chain and the sprockets is recommended during assembly.


    Object Number: 1883513  Size: SH
  8. Remove the camshaft sprocket bolts.

  9. Object Number: 1883514  Size: SH
  10. Remove the camshaft sprocket and the camshaft timing chain.
  11. Warning: Refer to Safety Glasses Warning in the Preface section.


    Object Number: 480547  Size: SH
  12. Remove the crankshaft sprocket using the J 5825-A remover .

  13. Object Number: 387761  Size: SH
  14. Remove the crankshaft balancer key.