Ford 2003 Mustang Workshop Manual page 1080

52. Remove the camshaft position sensor drive gear.
1. Remove the bolt.
2. Remove the camshaft position sensor drive gear.
53. Compress and install a retaining pin to hold the timing chain tensioner.
54. Remove the camshaft sprocket, the crankshaft sprocket and the timing chain as an assembly.
55. Remove the timing chain tensioner.
1. Remove the bolts.
2. Remove the timing chain tensioner.