Valve - Spring Squareness

WARNING: This page is about a different car, the 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.

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. Refer to ENGINE 4.6L 2V or ENGINE 4.6L 4V .
  
  Fig 1: Measuring Out-Of-Square On Each Valve Spring
  Courtesy of FORD MOTOR CO.