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LESSON 3: POWERTRAIN
Engine - 5.4L
5.4L 3-Valve Triton Phaser
The 2005 Expedition and Navigator are available with one engine:
•
New for 2005, the 5.4L 3-valve Triton V8.
– 300 horsepower @ 5,000 rpm
– 365 lb-ft of torque @ 3,750 rpm
– Variable cam timing
– Three valves per cylinder
Rather than focusing on a single item to gain improvements in power, Ford used an approach that included
advancements on multiple fronts. These improvements contribute to overall power with reduced NVH, at low
engine speeds. Some of these changes are outlined below:
•
The three-valve design achieves same benefits as a four-valve design.
– Three-valve design balances the forces generated by the valve and spring movement.
– Reduces engine noise.
•
Variable Cam Timing (VCT) varies cam timing to match performance demands.
2005 Expedition/Navigator New Model Technician Training02-SEP-043-2