Valve - Spring Squareness

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. 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 - 3.9L & 4.2L for the procedure .

Fig 1: Measuring Valve Spring Out-Of-Square

Courtesy of FORD MOTOR CO.