GM Service Manual Online
For 1990-2009 cars only

    Object Number: 153885  Size: SH

    Important: Torque sequence and specification is very important to valve body operation. If bolts are torqued at random, valve bores may become distorted and inhibit valve operation. DO NOT use air powered tools when assembling the valve bodies.

  1. Place the separator plate with the new gasket in the lower valve body.
  2. Temporarily install two plate bolts (1).

  3. Object Number: 153886  Size: SH
  4. Install a new upper valve body gasket (1) to the lower valve body.
  5. Install the upper valve body gasket and the lower valve body together to the rear upper valve body.

  6. Object Number: 153887  Size: SH
  7. Handstart the 3 lower valve body bolts.

  8. Object Number: 153889  Size: SH
  9. Turn the lower valve body upside down.
  10. Handstart the 4 upper valve body bolts.

  11. Object Number: 153916  Size: SH
  12. Remove the 2 temporarily installed bolts.

  13. Object Number: 153917  Size: SH
  14. Install the lower valve body to the front upper valve body (2).

  15. Object Number: 153921  Size: SH
  16. Handstart the remaining three lower valve body bolts.

  17. Object Number: 153923  Size: SH
  18. Turn over the valve body assembly.
  19. Handstart the five front upper valve body bolts.

  20. Object Number: 153926  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  21. Tighten the upper valve body bolts.
  22. Tighten
    Tighten the bolts to 5 N·m (44 lb in).


    Object Number: 153930  Size: SH
  23. Tighten the lower valve body bolts.
  24. Tighten
    Tighten the bolts to 5 N·m (44 lb in).

  25. Install the following components to the valve body (1):
  26. • The manual valve
    • The detent spring plate
    • The detent spring bolt

    Tighten
    Tighten the bolt to 5 N·m (44 lb in).