ZNTS 2pcs Timing Cam Phasers VVTi Actuator+Bolt For Ford Expedition Lincoln Navigator 2004-2006 59411611

Introductions:

In internal combustion engines, variable valve timing is the process of altering the timing of a valve lift event, and is often used to improve performance, fuel economy or emissions. It is increasingly being used in combination with variable valve lift systems. There are many ways in which this can be achieved, ranging from mechanical devices to electro-hydraulic and camless systems. Increasingly strict emissions regulations are causing many automotive manufacturers to use VVT systems.

Cam phaser issues were a common problem on certain 3 valve Fo-rd engines, and the design has been updated since. They had a minor oil pressure problem as well. The cam phasers are used to advance and retreat cam timing. This is oil pressure controlled by variable cam timing solenoids.

Specifications:

Package Includes: 2pcs Timing Cam Phasers VVTi Actuator+Bolt