Ford 2003 Mustang Workshop Manual page 1807

47. Using the special tool, install the 32 roller followers.
48. NOTE: If the valve cover is not secured within four minutes, the sealant must be removed and
the sealing area cleaned with metal surface cleaner. Allow to dry until there is no sign of
wetness, or four minutes, whichever is longer. Failure to follow this procedure can result in
future oil leakage.
Apply silicone gasket and sealant in the locations shown.
49. NOTE: The RH is shown; the LH is similar.
Install the valve covers and tighten the bolts in the sequence shown.