2001 Ford Fiesta drive belt

I have had to use diagrams from ford escort as the fiesta was not released here in the USA .. but they are basically the same engine .. get a haynes manual to double check the timing marks

Removal (Escort & Tracer)
Disconnect negative battery cable. Place cylinder No. 1 to TDC of compression stroke. Remove accessory drive belt and tensioner. Remove timing belt cover. Raise and support vehicle. Remove right hand splash shield. Remove crankshaft pulley. Align timing marks. See Fig. 1.
Loosen timing belt tensioner. Using an 8-mm hex wrench, turn tensioner 1/4 turn counterclockwise. Insert 1/8 drill bit to lock tensioner in place. See Fig. 2. If reusing old belt, mark belt with arrow to indicate original direction of rotation. Remove timing belt.

Installation
Ensure timing marks are still aligned. Install timing belt in a counterclockwise direction starting at the crankshaft. If reusing old belt, ensure it is installed in original direction of rotation. Keep belt span between crankshaft and camshaft tight while installing timing belt over camshaft.
Remove drill bit and tighten tensioner bolt. Rotate crankshaft clockwise 2 revolutions. Recheck timing mark alignment. To complete installation, reverse removal procedure.