General Procedure

WARNING: This page is about a different car, the 2014 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Refer to general specifications in the appropriate Engine article for the appropriate specification.

Measure the out-of-square on each valve spring.
- 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.
  
  Fig 1: Measuring Out-Of-Square On Valve Spring
  Courtesy of FORD MOTOR CO.