The Ford 6.7L Diesel engine is a powerhouse, delivering 475 horsepower and 1050 lb-ft of torque. Since its introduction in 2011, it has been a popular choice in many Ford trucks and vans. While this engine is known for its strength and reliability, there are some minor(ish) problems you should be aware of.
Common Problems to Watch Out For
My best friend owned a full-size van with this engine between the years of 2014 and 2017. For the most part, it was awesome. The biggest problem was EGR clogging issues, which never made sense to me considering how often I cleaned it out.
Here are some other common issues (most of which my friend never experienced):
1. EGT Sensor Failure
- What it is: The Exhaust Gas Temperature (EGT) sensors monitor the temperature of the exhaust gases.
- Symptoms:
- Failed emissions test
- Fault codes displayed on the dashboard
- Check engine light illuminated
- Tip: If an EGT sensor fails, you can replace it yourself. Many owners keep spare sensors handy to avoid dealer visits.
2. Radiator Leaks
- What it is: Radiators can develop leaks, which can lead to overheating.
- Symptoms:
- Overheating engine
- Coolant puddles under the vehicle
- Tip: Regularly inspect your radiator for leaks, especially in newer models, as they can still develop issues.
3. Glow Plug Failure
- What it is: Glow plugs help warm the engine for easier starting in cold conditions.
- Symptoms:
- Difficulty starting the engine
- Engine misfires or runs rough
- Tip: If you have an older model, consider replacing the glow plugs with upgraded versions that are more reliable.
4. Turbocharger Failures
- What it is: The turbocharger boosts engine performance but can experience failures.
- Symptoms:
- Screeching or whining noises
- Oil in the exhaust
- Smoke coming from the tailpipe
- Tip: Newer models (2017 and up) come with larger turbochargers designed to reduce the risk of failure.
5. EGR Clogging Issues
- What it is: The Exhaust Gas Recirculation (EGR) system can become clogged with carbon deposits.
- Symptoms:
- Check engine light activated
- Engine overheating
- Poor performance
- Tip: Cleaning or restoring the EGR system is often straightforward and doesn’t require special tools.
6. Injection Pump Failure
- What it is: The high-pressure fuel pump (HPFP) can fail, leading to metal contamination in the fuel system.
- Symptoms:
- Decreased engine performance
- Difficulty starting
- Tip: Ford has updated the pump in newer models to help prevent these issues.
7. NOx Sensor Failure
- What it is: The NOx sensor monitors nitrogen oxide emissions.
- Symptoms:
- Activation of “Limp Mode,” which limits engine power
- Poor acceleration
- Tip: If you experience this issue, it’s best to have a professional diagnose and fix it.
Is the Ford 6.7 Diesel Engine Reliable?
Yes, the 6.7L Power Stroke engine is generally reliable. Improvements in design over the years have made it more robust. Some notable features include:
- Better Cylinder Heads: The newer design with six bolts per cylinder reduces the chance of head bolt stretch and gasket failure.
- Engine Brake Feature: This feature helps control the vehicle while driving downhill, reducing brake wear.
- Advanced Fuel Injection System: This system enhances performance and fuel efficiency, making the engine run smoother and quieter.
How Long Will It Last?
With proper maintenance, the 6.7L engine can last over 200,000 miles and even exceed 300,000 miles. It’s no better or no worse than the life expectancy of the Ford V10 IMHO. It’s a bit better than Ford 5.4 L life expectancy though.
Regular oil changes and adhering to Ford’s recommended service intervals are crucial for longevity.
For what it’s worth, my friend put nearly 100,000 miles on his van with this engine. It was relatively trouble free other than the EGR issues. I would’ve guessed that it could’ve easily gone another 200,000 miles without major problems.
Recalls to Be Aware Of
Even the best engines can have issues. Here are some recalls from 2020 that you should know about:
- Models Affected: F-250, F-350, F-450, F-550
- Issue: A washer in the transmission can break, preventing the vehicle from fully engaging “park,” which may lead to rollaways.
- Airbag Recall: Some 2016 models were recalled due to dust affecting the electrical connections of the airbags, rendering them ineffective in a crash.
If you own one of these vehicles, you should have been contacted by Ford. If not, check with your dealership to see if your vehicle is affected and eligible for repairs.
Maintenance Tips for Your 6.7L Diesel Engine
To keep your engine running smoothly, follow these maintenance tips:
- Regular Oil Changes: Use high-quality oil and change it at recommended intervals.
- Check Filters: Regularly inspect and replace air and fuel filters as needed.
- Monitor Coolant Levels: Ensure your cooling system is functioning properly to prevent overheating.
- Inspect Belts and Hoses: Look for wear and tear, and replace any damaged components.
- Keep an Eye on Warning Lights: If any warning lights appear on your dashboard, address them promptly.
Most importantly: clean out the EGR on a regular basis!
