Blog > The Best Ford Diesel Engine: A Comprehensive Analysis

The Best Ford Diesel Engine: A Comprehensive Analysis

Diesel Engine Review

When it comes to diesel engines, Ford has established itself as a leading manufacturer with a rich history of producing reliable and powerful engines. Choosing the best Ford diesel engine can be a daunting task, considering the wide range of options available in the market. In this article, we will provide an unbiased analysis of different Ford diesel engines, highlighting their strengths, weaknesses, reliability, and historical background. We aim to help you make an informed decision when choosing a diesel engine, considering factors such as performance, warranty, and common problems associated with specific models.

Power Stroke Ford Diesel Engine
Power Stroke Ford Diesel Engine

Ford Diesel Engine History

Ford has a long and illustrious history in the world of diesel engines. It all started in the 1980s when Ford introduced its first diesel engine, the 6.9L V8 International Harvester IDI (Indirect Injection). This engine was known for its reliability and durability, making it a popular choice among truck owners. In 1994, Ford introduced the 7.3L Power Stroke V8 engine, which quickly became a legend in the diesel community. Its reputation for robustness and power made it a favourite among truck enthusiasts.

In 2003, Ford replaced the 7.3L Power Stroke with the 6.0L Power Stroke V8 engine. While this engine offered improved power and fuel efficiency, it was plagued by reliability issues, particularly with its fuel injectors and EGR (Exhaust Gas Recirculation) system. Despite these problems, the 6.0L Power Stroke remains a popular choice for those willing to invest in aftermarket upgrades to address its weaknesses.

Ford made significant improvements with introducing the 6.4L Power Stroke V8 engine in 2008. This engine featured a twin-turbocharger system and a redesigned fuel injection system, providing increased power and efficiency. However, it still had some reliability concerns, primarily related to its emissions control systems.

In 2011, Ford introduced the 6.7L Power Stroke V8 engine, which marked a turning point for the company. This engine was designed in-house by Ford and addressed many of the reliability issues of its predecessors. The 6.7L Power Stroke is known for its impressive power, fuel efficiency, and durability, making it one of the most reliable Ford diesel engines.

Best Ford Diesel Engines

Now that we have reviewed the historical background let’s dive into the analysis of the most reliable Ford diesel engines available in the market today.

1. 6.7L Power Stroke V8

The 6.7L Power Stroke V8 is one of the best Ford diesel engines ever produced. It offers exceptional power, torque, and fuel efficiency. With its robust design and advanced technology, this engine has proven highly reliable and durable. The 6.7L Power Stroke also boasts impressive towing and hauling capabilities, making it an ideal choice for truck owners who require exceptional performance.

2. 7.3L Power Stroke V8

Despite being an older engine, the 7.3L Power Stroke V8 still holds a special place in the hearts of many diesel enthusiasts. Known for its legendary reliability, this engine has stood the test of time. It offers ample power and torque, making it a favourite among those who value simplicity and dependability. The availability of aftermarket upgrades further enhances its performance potential.

3. 6.9L V8 International Harvester IDI

Although an older engine, the 6.9L V8 International Harvester IDI deserves a mention for its historical significance and reliability. This engine laid the foundation for Ford’s success in the diesel market and set the standard for durability. While it may not offer the power and efficiency of newer engines, it remains a solid choice for those seeking a reliable workhorse.

Common Problems and Reliability

While Ford has made significant strides in improving the reliability of its diesel engines, it is essential to be aware of potential issues associated with specific models. Here are some common Ford diesel engine problems:

  • 6.0L Power Stroke – The 6.0L Power Stroke has had a history of reliability issues, particularly with the fuel injectors and EGR system. Upgrading to aftermarket components and regular maintenance can help mitigate these problems.
  • 6.4L Power Stroke – The 6.4L Power Stroke might have issues with the emissions control systems, such as the Diesel Particulate Filter (DPF) and the Exhaust Gas Recirculation (EGR) system. Regular maintenance and proper care can prevent these problems from becoming major concerns.
  • 7.3L Power Stroke – While the 7.3L Power Stroke is renowned for its reliability, it is not without its faults. Some common issues include fuel leaks, injector o-ring failures, and occasional turbocharger problems. However, you can take care of these problems with proper maintenance and timely repairs.
  • 6.7L Power Stroke – The 6.7L Power Stroke has proven to be highly reliable, with minimal reported issues. However, some owners have experienced problems with the emissions control systems, such as the Diesel Exhaust Fluid (DEF) injector and DEF pump. Regular maintenance and adherence to recommended service intervals can help prevent these issues.

Warranty and Support

When purchasing a diesel vehicle, it is crucial to consider the the Ford diesel engine warranty and support offered by the manufacturer. Ford provides a comprehensive warranty for its diesel engines, typically covering them for a specified period or mileage, whichever comes first. It is essential to review the warranty terms and conditions to understand what is covered and for how long.

Additionally, Ford has an extensive network of authorized dealerships and service centers, ensuring that owners have access to qualified technicians and genuine parts. This network provides peace of mind and convenience regarding servicing and repairs.


Choosing the best Ford diesel engine requires careful consideration of various factors, including performance, reliability, warranty, and common problems associated with specific models. The 6.7L Power Stroke V8 and the 7.3L Power Stroke V8 stand out as top choices for their exceptional power, reliability, and aftermarket support. The 6.9L V8 International Harvester IDI holds historical significance and remains a reliable option for those seeking a workhorse engine.

Whether you are looking at a used or new Ford diesel engine, remember to assess your specific needs and preferences before making a decision. Proper maintenance, regular servicing, and adherence to recommended intervals are crucial for ensuring the longevity and performance of any Ford diesel engine. With the right choice and care, you can enjoy the power and reliability that Ford diesel engines are known for.

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