Leaking Radiator

The 6.4L Powerstroke is notorious for radiator leaks. Due to engine vibrations and weak bonding between the core and the plastic tanks, the radiator can crack, leading to coolant leaks. Symptoms of a leaking radiator include a noticeable puddle under the truck and the risk of overheating, which can cause even greater damage if not caught in time.

Oil Dilution

This issue occurs when fuel mixes with engine oil, reducing its ability to properly lubricate key engine components. In a 6.4L Powerstroke, oil dilution often happens due to the regeneration process of the diesel particulate filter (DPF). If your oil level seems unusually high, it’s a clear sign that fuel is diluting the oil, which can lead to severe wear inside the engine.

Cracked Up-Pipes

Power loss, soot buildup on your firewall, and a hissing noise under the hood are telltale signs of cracked-up pipes in your Powerstroke. This common problem reduces your engine’s efficiency and needs to be addressed immediately. The best solution is to replace the cracked pipes with stronger aftermarket alternatives.

DPF Clogging

The diesel particulate filter (DPF) is meant to reduce emissions but is also known for causing issues like clogging. When clogged, it can restrict exhaust flow, reduce fuel economy, and even cause the truck to enter limp mode. Frequent regeneration cycles make this problem worse, but identifying early signs like poor fuel efficiency can help you avoid costly repairs.

Oil Cooler Failure

The oil cooler in a 6.4L Powerstroke is essential for regulating oil temperatures, but when it fails, it can cause the engine to overheat or the oil to lose its cooling properties. If you notice oil leaks or temperature spikes, it’s a sign that your oil cooler might be failing, and it’s crucial to have it replaced before more serious damage occurs.

Bad Fuel Economy

If your fuel gauge seems to drop faster than usual, the DPF could be to blame. The 6.4L Powerstroke tends to experience poor fuel economy due to the frequent regeneration cycles of the DPF system. While the regeneration process is necessary, it’s also a major contributor to the truck’s inefficient fuel usage.

Cylinder Washing

This occurs when excess fuel from the DPF regeneration process dilutes the oil on the cylinder walls, leading to increased wear and, eventually, compression loss. Symptoms include poor engine performance, oil dilution, and a general decline in engine health over time.