GM Service Manual Online
For 1990-2009 cars only

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 895520  Size: SH

    Important: If the balance shafts are not properly timed to the engine, the engine may vibrate and make noise.

  1. Install the upper balance shaft chain guide.
  2. Tighten
    Tighten the balance shaft chain guide (upper) bolts to 10 N·m (89 lb in).


    Object Number: 895517  Size: SH
  3. Install the small balance shaft chain guide.
  4. Tighten the balance shaft chain guide bolts.
  5. Tighten
    Tighten the balance shaft chain guide (fixed) bolts to 10 N·m (89 lb in).


    Object Number: 895512  Size: SH
  6. Install the adjustable balance shaft drive chain guide.
  7. Tighten
    Tighten the balance shaft chain guide (adjustable) bolt to 10 N·m (89 lb in).


    Object Number: 895006  Size: SH
  8. Set the chain tensioner by performing the following steps:
  9. 5.1. Turn the plunger 90 degrees in its bore and compress the plunger.
    5.2. Turn the tensioner back to the 12 o'clock position and insert a paper clip through the hole on the plunger body and into the hole on the tensioner plunger.
  10. Install the balance shaft drive chain tensioner.
  11. Tighten the balance shaft drive chain tensioner bolts.
  12. Tighten
    Tighten the balance shaft chain tensioner bolts to 10 N·m (89 lb in).

  13. Remove the paper clip from the balance shaft drive chain tensioner.