Roller Follower Inspection

WARNING: This page is about a different car, the 2014 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the roller follower for flat spots or scoring. If any damage is found, inspect the camshaft lobes and hydraulic lash adjuster for damage.

Fig 1: Locating Roller Follower For Flat Spots/Scoring (OHC Engines)
Courtesy of FORD MOTOR CO.