Valve - Spring Squareness

Measure the out-of-square on each valve spring.

Fig 1: Measuring Out-Of-Square On Each Valve Spring
Courtesy of FORD MOTOR CO.
- Turn the valve spring and observe the space between the top of the valve spring and the square. Install a new valve spring if out of square. For additional information refer to ENGINE - 3.0L (2V) or ENGINE - 3.0L (4V) .