Bonneville V8-4.6L VIN Y (2004)
Notice: Clean the spark plug recess area before removing the spark plug. Failure to do so could result in engine damage because of dirt or foreign
material entering the cylinder head, or by the contamination of the cylinder head threads. The contaminated threads may prevent the proper seating of
the new plug. Use a thread chaser to clean the threads of any contamination.
7. Remove the spark plug from the cylinder being worked on.
8. Install the base plate of the J 44211 (2) over the spark plug hole of the cylinder to be serviced.
9. Install the J 39313 (1) in the spark plug hole.
10. Apply constant air pressure to the J 39313 (1) in order to keep the valve closed.
11. Install the arm and swivel nut of the J 44211 (2) over the stud corresponding to the valve to be serviced.
Warning:
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.
12. Tighten the swivel nut of the J 44211 (2) down only enough to allow access for removal of the valve locks.
13. Remove the valve locks. A magnet is the most suitable tool for this activity.
14. Loosen the swivel nut of the J 44211 (2) and swing the arm away from the valve spring retainer.
15. Remove the valve spring retainer and valve spring.
Important: The valve stem seal should not be removed unless replacement is required.
16. Use the J 38820 in order to grip the seal. Remove the seal by exerting a twisting, pulling motion. Discard the old valve stem seal.
17. Inspect and measure the valve spring. .
Installation Procedure
