GM Service Manual Online
For 1990-2009 cars only

    Object Number: 660543  Size: SH
  1. Install the piston oil cooling nozzle.
  2. Caution: Refer to Fastener Caution in the Preface section.


    Object Number: 663810  Size: SH

    Caution: The piston oil cooling nozzle must be aligned to direct oil towards the oil inlet hole on the bottom of the piston. Improper alignment of the piston oil cooling nozzle will allow insufficient oil lubrication to the piston and cause severe engine damage.

  3. Install the piston oil cooling nozzle bolt and tighten to 21 N·m (15 lb ft).