Ford 2003 Mustang Workshop Manual page 1000

1. Turn the camshaft so that the timing mark is at 12 o'clock and install the engine dynamic
balance shaft assembly into the cylinder block (6010). Turn the engine balance shaft driven
gear so that the timing mark lines up with the timing mark on the engine balance shaft drive
gear (6A303).
2. NOTE: If correctly aligned, the engine dynamic balance shaft keyway will be at 12 o'clock and
the camshaft keyway will be at 6 o'clock on the camshaft.
Install the bolts.
3. Install the radiator fan and shroud assembly.
4. Connect the connector and install the pin-type retainer.