Ford 2003 Mustang Workshop Manual page 1639

Installation
1. 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 cause future
oil leakage.
Apply a bead of silicone gasket and sealant in two places where the engine front cover meets
the cylinder head.
2. Install the RH valve cover and finger tighten the bolts.
3. Tighten the RH valve cover bolts in the sequence shown.