Ranger 4WD V6-3.0L VIN U (1997)
Valve: Testing and Inspection
Inspection
Inspect the valve stem for bends, and the end of the stem for grooves or scoring.
Inspect the valve face and the edge of the valve head for pits, grooves or scores. Inspect the stem for a bend condition and the end of the stem for
grooves or scores. Check the valve head for signs of burning or erosion, warpage and cracking. Minor pits, grooves, etc., may be removed. Discard
severely damaged valves.
Inspect the valve spring, valve spring retainer, valve spring retainer keys and discard any visually damaged parts.