Download CAUTION: Since the engine is not free wheeling if the crankshaft (6303) or the camshafts (6250) are moved in any manner during removal and installation the crankshaft and camshafts must be resynchronized. These steps are located in Engine Assembly Steps 36 to 48. 1. Remove the engine front cover (6019); refer to Engine Front Cover — 5.4L in this section. 2. Remove the crankshaft sensor ring from the crankshaft. 3. 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. Position the crankshaft with the Crankshaft Holding Tool as shown. 4. Install and fully tighten the Camshaft Holding Tools on both camshafts. 5. Remove the timing chain tensioning system from both timing chain/belts (6268). 1. Remove the bolts. 2. Remove the timing chain tensioners (6L266).