Timing Chain & Sprockets: Removal

Position No. 1 piston at TDC of compression stroke. Remove timing chain cover. See TIMING CHAIN COVER . Remove oil pan. Refer to OIL PAN .
Ensure all timing marks are aligned. See Fig 1. Check camshaft end play. If end play is not within specification, replace camshaft thrust plate. See CAMSHAFT table under ENGINE SPECIFICATIONS.
Remove camshaft sprocket retaining bolt and crankshaft sprocket Woodruff key. Remove tensioner and guide rail; replace worn parts as necessary. Remove crankshaft, camshaft sprockets and timing chain as an assembly.
If crankshaft sprocket is difficult to remove, carefully pry off with a pair of screwdrivers positioned evenly on sprocket.

Fig 1: Identifying Timing Chain & Components

Courtesy of FORD MOTOR CO.