GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 CTS 🢒 Engine 🢒 Engine Mechanical - 2.6L and 3.2L 🢒 Camshaft Drive Sprocket Replacement

Tools Required

    • J 36660-A Torque/Angle Meter
    • J 42069 Timing Belt Alignment Kit
    • J 42098 Crank Hub TORX® Socket

Removal Procedure
  1. Remove the timing belt. Refer to Timing Belt Replacement .

    2. Object Number: 828921 Size: SH
  2. As a precaution, rotate the crankshaft counter clockwise using the J 42098 until 60 degrees Before Top Dead Center (BTDC).

    3. The 60 degrees BTDC point can be identified by the index mark on the oil pump cover, at this position the valves will not touch the pistons.


    Object Number: 345381 Size: SH
  3. Remove the camshaft drive sprocket bolt.

    4. The J 42069-1 and J 42069-2 will hold the drive sprockets in place while removing the bolts.

    Discard the camshaft drive sprocket bolt.

  4. Remove the J 42069-1 and J 42069-2.
  5. Remove the camshaft drive sprocket.

Installation Procedure

    Object Number: 828921 Size: SH
  1. Ensure the crankshaft is 60 degrees BTDC.

    2. The 60 degrees BTDC point can be identified by the index mark on the oil pump cover, at this position the valves will not touch the pistons.


    Object Number: 159005 Size: SH

    Important: The camshaft drive sprockets have numbered slots that must be aligned with the pins on the camshafts.

    When the numbered camshaft drive sprocket slot is properly installed on the camshaft pin, the reference mark (1, 2, 3 or 4) on the drive sprocket, will align with the notch on the rear timing belt cover.

  2. Install the camshaft drive sprocket.

    3. Ensure the camshaft pin is installed in the correct numbered slot on the drive sprocket.

    Notice: Refer to Torque to Yield Bolts Notice in the Preface section.


    Object Number: 159009 Size: SH
  3. Install the new camshaft drive sprocket bolt.

    4. Object Number: 159005 Size: SH
  4. If necessary, turn the camshaft drive sprockets in order to align the reference marks on the camshaft gears with the corresponding notches on the rear timing belt cover.

    5. Object Number: 345381 Size: SH
  5. Complete the following in order to tighten the new camshaft drive sprocket bolt:
    6. 5.1. Use the relevant J 42069-1 and/or J 42069-2 to hold the camshaft drive sprocket and the camshaft in place while tightening the camshaft drive sprocket bolt.

    Notice: Refer to Fastener Notice in the Preface section.

    5.2. Tighten the camshaft drive sprocket bolt in sequence:

    Tighten

    1. Tighten the camshaft drive sprocket bolt to 50 N·m (37 lb ft).
    2. Using the J 36660-A , rotate the camshaft gear bolt 60 degrees.
    3. Repeat the sequence turning the camshaft gear bolt an additional 15 degrees.

    Object Number: 826214 Size: SH
  6. Turn the crankshaft back to Top Dead Center (TDC), using the J 42098 .
  7. Install the timing belt. Refer to Timing Belt Replacement .