Positives:
* Power: For its time, the 5.4L offered substantial power, making it a popular choice for trucks and SUVs.
* Torque: It generally produced good torque, suitable for towing and hauling.
* Relatively Simple Design (Early Versions): The earlier iterations of the 5.4L were relatively straightforward in design, making some repairs and maintenance simpler than more complex engines.
Negatives:
* Cam Phaser Issues: This is arguably the biggest and most common problem. The cam phasers, responsible for variable valve timing, were prone to failure, leading to rough running, poor performance, and potentially catastrophic engine damage. This was particularly problematic in later model years.
* Spark Plug Problems: Removing spark plugs could be difficult and sometimes resulted in broken spark plugs, requiring costly repairs. This was again more of an issue in certain model years.
* Intake Manifold Issues: Some models experienced problems with the intake manifold, leading to vacuum leaks and performance issues.
* Oil Consumption: Higher mileage engines often exhibited increased oil consumption.
Overall:
The 5.4L Ford Triton engine had its strengths, but its weaknesses, particularly the cam phaser and spark plug issues, significantly impacted its reliability. Whether or not a 5.4L is a good engine *depends entirely* on its maintenance history and the specific year of manufacture. A well-maintained 5.4L from an earlier model year might be reasonably reliable, while a neglected or later model year engine could be a constant source of headaches and expense. Thorough inspection and understanding of potential problems are crucial before purchasing a vehicle equipped with this engine. Researching specific years and common problems for that year is strongly recommended.
