E 150 V8-5.4L (2008)
Valve: Testing and Inspection
Valve Inspection
1. Inspect the following valve areas:
1
The end of the stem for grooves or scoring.
2
The valve face and the edge for pits, grooves or scores.
3
The valve head for signs of burning, erosion, warpage and cracking.
4
The valve margin for wear.
