Ford 2003 Mustang Workshop Manual page 1562

30. CAUTION: Unless otherwise instructed, at no time when the timing chains are
removed and the cylinder heads are installed is the crankshaft or camshaft to be rotated.
Severe piston and valve damage will occur.
CAUTION: Rotate the crankshaft counterclockwise only. Do not rotate past position
shown or severe piston and/or valve damage will occur.
Using the special tool, position the crankshaft.
Remove the special tool.
31. Install the crankshaft sprocket with the flange facing forward.
32. Position the LH (inner) timing chain onto the crankshaft sprocket, aligning the one copper link
on the timing chain with the slot on the crankshaft sprocket.