Ranger 4WD V6-3.0L VIN U (1997)
Valve Spring: Testing and Inspection
Squareness
Check each valve spring for squareness using a steel square and a flat surface. Stand the valve spring and square on end. Slide the valve spring up to the
square. Revolve the valve spring slowly and observe the space between the top coil of the valve spring and the square. Follow the same procedure for
new valve springs before installation. Make sure the proper valve spring (color-coded) is installed.
CAUTION: Make sure the valve springs are reassembled to their own original dampers by pushing damper on the valve spring. Do not open damper
with any kind of tool in order to reassemble.
