Ford 6.4L Power Stroke Diesel Engine: Pros and Cons

If you're considering a used Ford Super Duty truck from the 2008–2010 range, chances are it comes equipped with the 6.4L Power Stroke diesel engine. Known for its power and potential, this engine also comes with its fair share of mechanical quirks. Here's what every buyer or Ford diesel fan should know about the 6.4 Power Stroke.

Ford F-550

🔧 What Is the Ford 6.4L Power Stroke?

The 6.4L Power Stroke diesel engine was introduced by Ford in 2008 and used through 2010 in its Super Duty line of trucks. Manufactured by International/Navistar, this twin-turbocharged V8 engine was designed to meet stricter emissions standards while offering more power than its predecessor, the 6.0L.

✅ Pros of the 6.4 Power Stroke Engine

1. Powerful Performance

With up to 350 horsepower and 650 lb-ft of torque, the 6.4L delivers strong towing capacity and acceleration. Its twin-turbo design (featuring sequential turbos) offers better low-end torque and high-end power.

2. Improved Over the 6.0L

The 6.4L addressed many of the common failure points in the 6.0L engine, including better EGR system design and fewer issues with head gasket failures (thanks to stronger head bolts and a better gasket design).

3. Smooth and Quiet Operation

This engine runs quieter than previous Power Stroke models and offers a smoother ride, making it more comfortable for long hauls or daily driving.

4. Strong Aftermarket Support

There’s a large community of Ford diesel enthusiasts and parts suppliers that cater to the 6.4L platform, making upgrades and repairs easier to find.

⚠️ Cons of the 6.4 Power Stroke Engine

1. Fuel Economy

The 6.4L is not known for fuel efficiency. While it offers impressive power, owners often report fuel mileage in the 10–14 MPG range, especially under load.

2. Expensive Repairs

When things go wrong, they can go very wrong. Common issues include radiator failures, EGR cooler problems, and high-pressure fuel system failures. Repairs can be labor-intensive and costly due to the engine’s tight layout.

3. DPF and Emissions System Problems

The engine uses a diesel particulate filter (DPF) that can clog over time. Regeneration cycles can cause excessive fuel dilution in the oil, leading to shorter oil life and increased wear if not carefully maintained.

4. Limited Production Window

Because the 6.4L was only produced for three model years, some replacement parts may be harder to find over time compared to longer-running Power Stroke engines.

🛠️ Is the Ford 6.4L Diesel Right for You?

If you're looking for a powerful, comfortable truck with strong towing capacity, the 6.4L Power Stroke is worth considering—especially if it’s been well-maintained. However, be prepared for higher maintenance costs and the need for proactive service to keep it running reliably.

Ford 6.4L Power Stroke Engine at a Glance

Quick Engine Specs - Ford 6.4L Power Stroke Diesel (2008–2010)

• Engine Type: Twin-Turbocharged Diesel V8

• Displacement: 6.4L / 390 cu in

• Configuration: 90° V8

• Aspiration: Twin Sequential Turbochargers

• Fuel System: High-Pressure Common Rail (Piezo Injectors)

• Horsepower: 350 hp @ 3,000 rpm

• Torque: 650 lb-ft @ 2,000 rpm

• Compression Ratio: 17.5:1

• Valvetrain: OHV, 32-valve

• Block/Head Material: Cast Iron Block / Aluminum Heads

• Cooling System: Dual radiator and EGR coolers, 29-quart coolant capacity

• Transmission Pairing: 5-speed TorqShift automatic

• Years in Production: 2008–2010

• Emissions Equipment: EGR, DPF, DOC

• Common Applications:Ford F-250, F-350, F-450, F-550 Super Duty

• Towing Capacity:Up to 16,500 lbs conventional / 24,500 lbs gooseneck (F-450)

  
  

📍Need Help With a 6.4 Power Stroke?

At Maestro Truck and Auto Service, we’ve worked on countless Ford diesel trucks—including the 6.4L. Whether you need diagnostics, emissions service, or a full engine repair, we’re here to help.

📞 Call us at (727) 699-1099 to schedule your appointment today.