![]() ![]() ![]() In this manner, VCT allows the engine to advance or retard the camshaft timing. With the use of a phaser, the camshaft is allowed to move independently of the timing sprocket. On some vehicles, including the 5.4L 3 Valve, VCT is controlled so that it also replaces the EGR system. VCT is a way to juggle both the need for high torque and the need for engine efficiency. There is also a 5.4L 4v used in Navigators but it also does not use variable valve timing.įrom this point on, I will be using VCT to refer to variable cam timing. The 5.4L 3 valve used from 2004-2010 with variable valve timing outperforms that engine in every way, producing 15ft.lbs more torque and around more 40hp. The 5.4L 2 valve used between 1997-2004 only has a total of 16 valves for all cylinders but does not have variable valve timing system. Here is a quick reference if you are unfamiliar with Ford Triton line of engines there are three main variations 97-up. This article is mainly written with the 5.4L truck engine in mind, but also applies to the 4.6L Ford modular 3 valve engine used in trucks, vans, and cars. This is a very detailed technical article so feel free to bookmark and share. What is a phaser?, What does it do? I get into the details of how the 5.4L's variable cam timing system works. Many are confused about the rattling sounds they hear on light acceleration and many people have been told it is the phasers. The Ford 5.4L Triton 3 valve engine is a wonderful masterpiece that many hate and do not understand. ![]()
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