GM Service Manual Online
For 1990-2009 cars only

Special Tools

    • J 42386-A Flywheel Holding Tool
    • J 45059 Angle Meter

Removal Procedure

    Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 1658136  Size: SH
  1. Install the J 42386-A  (1) and bolts. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten the J 42386-A bolts to 50 N·m (37 lb ft).
  2. Remove the camshaft position (CMP) actuator magnet. Refer to Camshaft Position Actuator Magnet Replacement.
  3. Warning: Refer to Camshaft Position Actuator Removal and Installation Warning in the Preface section.


    Object Number: 1670622  Size: SH
  4. Remove the CMP actuator solenoid valve (234).
  5. Discard the solenoid valve.

Installation Procedure


    Object Number: 1670622  Size: SH
  1. Install a NEW CMP actuator solenoid valve (234).
  2. With the CMP actuator properly positioned onto the camshaft, the CMP actuator solenoid valve can be threaded completely into the camshaft using light hand pressure. Tighten by hand until snug.


    Object Number: 1658245  Size: SH
  3. Tighten the CMP actuator solenoid valve.
  4. 2.1. Tighten the CMP actuator solenoid valve a first pass to 65 N·m (48 lb ft).
    2.2. Tighten the CMP actuator solenoid valve a final pass an additional 90 degrees using the J 45059 .

    Object Number: 1658136  Size: SH
  5. Remove the J 42386-A  (1).
  6. Install the CMP actuator magnet. Refer to Camshaft Position Actuator Magnet Replacement.