GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 6.6L (LB7) 🢒 Cylinder Head Assemble

Tools Required

    • J 44640 Valve Stem Seal Installer
    • J 8062 Valve Spring Compressor

    Object Number: 663570 Size: SH

    Important: Lubricate the valve stem with clean engine oil before installing.

  1. Install the valves into the cylinder head.
  2. Install the valve spring lower seat.

    3. Object Number: 663571 Size: SH
  3. Install the valve stem seal using J 44640 .
  4. Install the valve spring with the painted end towards the cylinder head.
  5. Install the valve spring upper seat.

    6. Object Number: 663501 Size: SH
  6. Use the J 8062 to compress the valve spring.
  7. Install the valve keys.
  8. Remove the J 8062 from the cylinder head.