Ford 2003 Mustang Workshop Manual page 1343

2. CAUTION: Cylinder head machining or milling is not authorized by the Ford Motor
Company. Cylinder head flatness must be within 0.0254 mm (0.001 in) across a 38.1 mm
(1.5 in) square area.
CAUTION: The use of sealing aids (aviation cement, copper spray and glue) is not
permitted. The gasket must be installed dry.
CAUTION: Do not allow the dowels to scratch the sealing surface of the cylinder
head during cylinder head installation.
NOTE: The new cylinder head bolts must be lightly oiled with a rag, and allowed to drain for a
few minutes prior to installation.
NOTE: RH head gasket shown; LH head gasket similar.
Install the cylinder head on the dowels and the head gasket. Loosely install new bolts.
NOTE: Position the cylinder head(s) over the dowels on the head gasket(s).
3. NOTE: LH shown, RH similar.
Tighten the bolts in six stages in the sequence shown.
Stage 1: Tighten to 40 Nm (30 lb-ft).
Stage 2: Tighten an additional 90 degrees.
Stage 3: Loosen the bolts a minimum of one full turn.
Stage 4: Tighten to 40 Nm (30 lb-ft).
Stage 5: Tighten an additional 90 degrees.
Stage 6: Tighten an additional 90 degrees.