6.4L Power Stroke Engines
The introduction of the 6.4L Power Stroke has set the bar for comfort and beauty. The engine is strong and powerful, and the interior and exterior redesign has made the 6.4L Ford a sight to behold. The issues that Lind has experienced with this Power Stroke became apparent with poor fuel economy, due to a more complicated and troublesome emissions system and chronic issues found in the cooling system. The water pumps in the massive 6.4L Fords have a tendency to erode the front cover housing and aerate the system. This issue can ultimately lead to failures in both the radiator and EGR cooler. The stock thermostats are also frequently problematic, and Ford offers an updated unit that should be promptly installed. The use of updated and stronger aftermarket parts is highly recommended to stop future problems from occurring.
Although the next issue is still being observed, Lind has witnessed a few rocker arm failures at around 120k miles, and in some cases, the rocker arm has damaged the engine so profoundly that a replacement from Ford has been the most cost-effective solution.
"Everything you do in the 6.4L is a 'big job,'" said Lind. "The engine bay is incredibly crowded; many wiring harness issues take place under the turbos, requiring the removal of the cab. Most of these big jobs start with removing the cab, and this is an expensive proposition."
While each new generation of Power Stroke has been able to answer some of the problems of their predecessors, newer problems have arisen in their place. Each newer engine has been redesigned to create a better, stronger and more efficient driving experience, but none of them are completely free of inherent issues. Using these tips is the first step to keeping your Ford safe, powerful and on the road and keeping your troubleshooting to a minimum.
Editor’s Note: The Troubleshooting feature is a three-part series that focuses on the top three diesel truck manufacturers. Part one in our September issue covered Duramax engines and our November issue highlighted the Cummins engine.
Left Coast Diesel
Left Coast Diesel is the Bay Area’s premier light diesel performance and repair facility. The California-based company can handle anything from oil changes to full competition builds. Its 8,000-square-foot shop in Concord houses a DynoJet with a load cell and five lifts to get you back on the road faster. Its Livermore location offers another 3,500 square feet of service space. For more information visit www.leftcoastdiesel.com.