Camshaft Position Actuator Adjuster Installation

Special Tools

• EN-6340  Camshaft Adjuster Locking Tool
• EN-6628-A  Camshaft Locking Tool
• EN-45059  Angle Meter

For equivalent regional tools, refer to Special Tools .

1. Turn the camshaft by the hexagon until the groove on the end of the camshafts is horizontal.
   Fig 1: Aligning Camshafts Horizontally

   Courtesy of GENERAL MOTORS COMPANY
   NOTE: Note the arrows.
2. Install the EN-6628-A  locking tool (1).
   Fig 2: Locking Tool

   Courtesy of GENERAL MOTORS COMPANY
3. Install intake camshaft position actuator adjuster and/or the exhaust camshaft position actuator adjuster (3).
   Fig 3: Camshaft Position Actuator Adjuster Closure Bolt

   Courtesy of GENERAL MOTORS COMPANY
   NOTE: If the cover is contaminated with oil, you have to clean it close.
4. Install a NEW intake camshaft position actuator adjuster bolt and/or a NEW exhaust camshaft position actuator adjuster bolt (2). DO NOT tighten the bolts yet.
5. Install the EN-6340  locking tool into the camshaft position actuator adjusters.
   Fig 4: Spot Type Markings And Locking Tool

   Courtesy of GENERAL MOTORS COMPANY
   1. Install the EN-6340-left  locking tool (1) in the camshaft position actuator adjusters as shown.
      NOTE: The spot type marking (4) on the intake camshaft position actuator adjuster does not correspond to the groove of EN-6340-left  locking tool - left during this process but must be somewhat above as shown.
   2. Install the EN-6340-right  locking tool (2) in the camshaft position actuator adjusters as shown.
      NOTE: The spot type marking (3) on the exhaust camshaft position actuator adjuster must correspond to the groove on EN-6340-left  locking tool - right.
6. Install the camshaft position actuator adjuster bolts (2) and tighten the bolts in 3 passes using the EN-45059  meter.
   Fig 5: Camshaft Position Actuator Adjuster Closure Bolt

   Courtesy of GENERAL MOTORS COMPANY
   CAUTION: Refer to Fastener Caution .
   CAUTION: Refer to Torque-to-Yield Fastener Caution .
   NOTE: A second technician is required.
   NOTE: Use an appropriate open-end wrench in order to counterhold the camshaft hexagon. A thin cross-section wrench is required for a better fit. The usage of EN-6628-A locking tool is for the camshaft adjustment to prevent misalignment of the camshafts. The wrench is required to counterhold the camshafts during bolt torque procedure.
   1. First pass to 50 N.m (37 lb ft)
   2. Second pass to an additional 150 degrees
   3. Final pass to an additional 15 degrees
7. Install the 2 camshaft position actuator adjuster closure plugs (1) and tighten to 30 N.m (22 lb ft).
   NOTE: Check the closure bolt seal ring.
8. Remove the EN-6628-A  locking tool.
9. After the installation of the timing belt, rotate the engine 720 degrees and check the position of the crankshaft and camshafts, again. Refer to Timing Belt Adjustment .