GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Impala 🢒 Engine 🢒 Engine Mechanical - 3.5L 🢒 Cylinder Head Assemble

Tools Required

    • EN-47823 Valve Spring Compressor Adapter
    • J 5892-D Valve Spring Compressor

    Object Number: 1665094 Size: SH

    Important: Use oversize valve stem seals if you install oversize valves.

  1. Lubricate the valve stem with clean engine oil.
  2. Install the valves.
  3. Lightly tap the new or reconditioned valves into the valve seat.
  4. Install the valve stem oil seals, ensuring proper intake - black seal and exhaust - brown seal, seals are installed.
  5. Install the valve springs.
  6. Install the valve spring caps.

    7. Object Number: 1866466 Size: SH
  7. Using caution so as not to damage the valve spring or valve spring dampener, compress the valve springs using the J 5892-D  (1) and the EN-47823  (2).
  8. Install the valve spring cap keys. Hold the valves in place with grease, if necessary.
  9. Release the valve springs.
  10. Ensure that the valve locks are seated.

    11. Object Number: 909634 Size: SH
  11. Apply sealer P/N 21485278 to the coolant temperature sensor.

    12. Notice: Refer to Fastener Notice in the Preface section.

  12. Install the coolant temperature sensor, if required.

    13. Tighten
    Tighten the coolant temperature sensor to 23 N·m (17 lb ft).

  13. Install the heater inlet pipe stud, if required.

    14. Tighten
    Tighten the heater inlet pipe stud to 35 N·m (26 lb ft).