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Valve Spring Strength

WARNING: This page is about a different car, the 2009 Mercury Mountaineer, 2009 Ford Explorer Sport Trac, and 2009 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Special Tools

Illustration Tool Name Tool Number
GF0000211Courtesy of FORD MOTOR CO.
Pressure Gauge, Valve/Clutch Spring 303-006 (TOOL-6513-DD) or equivalent
NOTE: Refer to the appropriate ENGINE - 4.0L SOHC or ENGINE - 4.6L (3V) .
  1. Use the Valve/Clutch Spring Pressure Gauge to check the valve spring for correct strength at the specified valve spring length.
  2. Fig 1: Identifying Special Tool (303-006)
    GF0040879Courtesy of FORD MOTOR CO.