GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 STS 🢒 Engine 🢒 Engine Mechanical - 3.6L 🢒 Valve Stem Oil Seal and Valve Spring Replacement - Right Side

Tools Required

    • EN 46106 Flywheel Holding Tool
    • EN 46110 On-Vehicle Valve Spring Compressor
    • EN 46116 Valve Stem Seal Remover/Installer
    • EN 46117 Valve Stem Key Remover/Installer
    • J 39313 Spark Plug Port Adapter

Removal Procedure
  1. Remove the starter motor. Refer to Starter Motor Replacement .

    2. Object Number: 945978 Size: SH

    Important: If the EN 46106 is not installed, the crankshaft may rotate. If the crankshaft rotates, disassembly and reassembly of the entire camshaft timing system may be required.

  2. Install the EN 46106 in order to prevent crankshaft rotation.
  3. Remove the camshafts and rocker arms. Refer to Camshaft Replacement - Right Side .
  4. Remove the spark plug from the applicable cylinder. Refer to Spark Plug Replacement .
  5. Install the J 39313 to the applicable cylinder.
  6. Connect the J 39313 to a compressed air source.

    7. Object Number: 1338337 Size: SH
  7. Install the EN 46110 above the applicable cylinder as shown.

    8. Caution: Compressed valve springs have high tension against the valve spring compressor. Valve springs that are not properly compressed by or released from the valve spring compressor can be ejected from the valve spring compressor with intense force. Use care when compressing or releasing the valve spring with the valve spring compressor and when removing or installing the valve stem keys. Failing to use care may cause personal injury.

    Notice: Do not compress the valve springs to less than 24.0 mm (0.943 in). Contact between the valve spring retainer and the valve stem oil seal can cause potential valve stem oil seal damage.

  8. Tighten the EN 46110 valve spring compressor nut (2).

    9. Object Number: 902903 Size: SH
  9. Using the EN 46117 remove the valve keepers.
  10. Loosen the EN 46110 valve spring compressor nut.
  11. Remove the valve spring retainer.

    12. Object Number: 902899 Size: SH
  12. Remove the valve springs.

    13. Object Number: 1338340 Size: SH
  13. Use the EN 46116  (1) in order to remove the valve stem seal (2).

Installation Procedure

    Object Number: 1338340 Size: SH
  1. Use the EN 46116  (1) in order to install the valve stem seals (2).

    2. Object Number: 902899 Size: SH
  2. Install the valve spring.
  3. Install the valve spring retainer.

    4. Object Number: 1338337 Size: SH
  4. Install the EN 46110 above the applicable valve spring as shown.

    5. Tighten the EN 46110 valve spring compressor nut (2).


    Object Number: 1210911 Size: SH

    Important: Ensure proper directional placement of valve keepers in the EN 46117 . The valve keepers must be installed with the tapered end towards the valve stem seal.

  5. With the spring compressed, install the valve keepers into the EN 46117 .

    6. Object Number: 902903 Size: SH
  6. Install the valve spring keepers.
  7. Remove the EN 46110 .
  8. Disconnect the J 39313 from the compressed air source.
  9. Remove the J 39313 .
  10. Install the spark plugs. Refer to Spark Plug Replacement .
  11. Install the rocker arms and camshafts. Refer to Camshaft Replacement - Right Side .
  12. Remove the EN 46106 .
  13. Install the starter motor. Refer to Starter Motor Replacement .