GM Service Manual Online
For 1990-2009 cars only

Special Tools

EN-45059 Torque Angle Sensor Kit

For equivalent regional tools, refer to Special Tools.


    Object Number: 2027018  Size: SH
  1. Clean the sealing surfaces.
  2. Inspect for plane surface.
  3. ā€¢ Cylinder block, cylinder head
    ā€¢ Straight-edge, feeler gage
  4. Install the cylinder head gasket.
  5. Install the cylinder head.
  6. Caution: Refer to Fastener Caution in the Preface section.

    Note: Note the correct tightening sequence.

  7. Install NEW cylinder head bolts (1).
  8. Tighten the bolts in 5 passes. Use the EN-45059 torque angle sensor kit.
  9. ā€¢ First pass to  25 NĀ·m (18 lb ft)
    ā€¢ Second pass to  90 degrees
    ā€¢ Third pass to  90 degrees
    ā€¢ Fourth pass to  90 degrees
    ā€¢ Fifth pass to  45 degrees