GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 42069 Timing Belt Alignment Kit

Removal Procedure

  1. Disconnect the negative battery cable.

  2. Object Number: 894303  Size: SH
  3. Remove the timing belt cover. Refer to Timing Belt Front Cover Replacement

  4. Object Number: 894184  Size: SH

    Notice: Set crankshaft to 60 degrees before top-dead center or after TDC to prevent valve to piston contact.

  5. Remove the timing belt. Refer to Timing Belt Replacement .

  6. Object Number: 894899  Size: SH

    Important: When removing the camshaft sprockets, use the J42069-1 and J42069-2 camshaft locks to lock the sprockets when initially loosening the camshaft sprocket bolts.

  7. Remove the camshaft sprocket bolts.
  8. Remove the camshaft drive sprocket.

Installation Procedure


    Object Number: 894904  Size: SH

    Notice: The camshaft sprocket bolts are not reusable, it is a torque-to-yield (TTY) bolt, and must be discarded to prevent premature failure.

  1. Install the camshaft sprockets and new bolts.
  2. Align the camshaft sprocket with the pin on the camshaft.
  3. • Align the correct camshaft with the corresponding number on the sprocket.
    • Camshaft sprockets 1 and 2 are interchangeable and camshaft sprockets 3 and 4 are interchangeable.

    Notice: Refer to Fastener Notice in the Preface section.

  4. Use the timing belt alignment kit J42069-1 and J42069-2 camshaft locks to lock sprockets when torquing camshaft sprocket bolts.
  5. Tighten
    Tighten the camshaft sprocket bolt to 50 N·m (37 lb ft) + 60° +15°.


    Object Number: 894184  Size: SH
  6. Install and adjust the timing belt. Refer to Timing Belt Replacement .

  7. Object Number: 894303  Size: SH
  8. Install the front cover. Refer to Timing Belt Front Cover Replacement .
  9. Reconnect the negative battery cable.
  10. Tighten
    Tighten the battery terminal bolt to 17 N·m (13 lb ft).