In this video from Cloyes, we diagnose timing chain system issues related to VVT cam phasers, or sprockets, on Ford Modular 5.4 liter engines. We also replace the VVT phasers with Cloyes’ new VVT phasers, which can be found in Cloyes kit 9-0391SBVVT.

UPDATE: Cloyes has released an updated kit, part number 9-0391SBVVT1, that also includes solenoids.