Ford's 5.4L 3V Triton engines have developed a reputation for early failure. The most common symptoms are a loss of oil pressure, ticking/clacking noise and trouble codes for cam position. This usually leads to cam phaser failure and timing chain tensioner breakage. Unfortunately, due to misinformation on the internet, many owners replace the phasers and timing sets, only to have the problem re-occur. The actual cause of the problem is excessive oil clearance on the cam journals in the cylinder heads. This allows any contaminants in the oil to lodge between the cam and the journals, scarring the surface. In addition, they can't keep an adequate film of oil on the cam, causing further wear and scarring. This leads to the cam seizing in the head, which causes the phaser and timing chain damages. To correct the problem, the cam journals are bored out and custom made cam bearings are installed to obtain the proper clearance. In addition, the Melling HP oil pump is installed for proper phaser actuation. These engines are built with all new OEM spec components and upgraded with graphite coated hypereutectic pistons. We've been in business selling these engines longer than all of our major competitors COMBINED, and maintain an A+ rating with the BBB. So when it's time to replace yours, give us a call! We're the industry experts! As always, when purchasing anything online, make sure you are comparing apples to apples. We've been made aware that there are unscrupulous dealers out there online that are not advising customers of what they are buying. If you're paying for an engine with new OEM cam phasers, make sure that's what you're getting. All of our Ford engines are covered by a class leading 3 year/100,000 mile parts and labor warranty.