GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • EN 46105 Camshaft Locking Tools
    • EN 46111 Crankshaft Rotation Socket

    Object Number: 1961736  Size: SH

    Important: LE0 and LW2 engines only have an intake camshaft position sensor.

  1. Remove the camshaft position actuator sensor to engine front cover retaining bolts (2).
  2. Remove the camshaft position sensors (1).

  3. Object Number: 1958119  Size: SH

    Important: LE0 and LW2 engines only have an intake camshaft position actuator valve.

  4. Remove the camshaft position actuator valve to engine front cover retaining bolts (1).
  5. Remove the camshaft position actuator valves (2).

  6. Object Number: 1961734  Size: SH
  7. Remove the engine front cover to cylinder block retaining bolts (1).

  8. Object Number: 1958120  Size: SH

    Notice: Do not pry between the engine front cover and the camshaft position sensors or the camshaft position actuators in order to separate the RTV. Use the pry points and a bolt in the jackscrew hole in order to remove the engine front cover. Damage to the camshaft position sensors or the camshaft position actuators may occur if the camshaft position sensors or the camshaft position actuators are used to pry against in order to remove the engine front cover.

  9. Loosely install a 10 x 1.5 mm bolt in the jackscrew hole (1).
  10. Using the pry points (2) located at the edge of the front cover and the jackscrew, shear the Room Temperature Vulcanizing (RTV) sealant.

  11. Object Number: 1958123  Size: SH
  12. Remove the engine front cover (1).

  13. Object Number: 1958785  Size: SH
  14. Using the EN 46111  (1), rotate the crankshaft until the left cylinder head camshafts align with the EN 46105 and the right cylinder head camshafts align with the EN 46105 .

  15. Object Number: 1958037  Size: SH
  16. Install the EN 46105  (2) onto the rear of the right hand camshafts (1).

  17. Object Number: 1958789  Size: SH
  18. Install the EN 46105  (2) onto the rear of the left hand camshafts (1).