GM Service Manual Online
For 1990-2009 cars only

Special Tools

J 43650 Balance Shaft Bushing Remover/Installer

For equivalent regional tools, refer to Special Tools


    Object Number: 598032  Size: SH

    Note: Service the balance shafts as an assembly. Do not disassemble or assemble the balance shafts.

  1. Install the balance shaft bushing using the J 43650 installer .

  2. Object Number: 598033  Size: SH
  3. Seat the balance shaft bushing into the bore using the J 43650 installer and a wrench.
  4. When the J 43650 installer is fully seated in the engine block, remove it with a wrench.

  5. Object Number: 412419  Size: SH

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

  6. Install the balance shaft assemblies to the engine using the following steps:
  7. 4.1. Place the number 1 piston at top dead center (TDC).
    4.2. Lubricate the balance shaft lobes with engine oil.
    4.3. Install the balance shafts into their bores.

    Caution: Refer to Fastener Caution in the Preface section.

  8. Install the balance shaft retaining bolts and tighten to 10 N·m (89 lb in).