671 Detroit diesel engine overview

The 671 Detroit Diesel engine is a significant part of the Detroit Diesel Series 71, known for its reliability and performance. As a two-stroke engine with various applications, it has stood the test of time in both industrial and marine environments. This article delves into the specifics of the 671 Detroit Diesel engine, offering insights into its specifications, common issues, and more.

Detroit Diesel Series 71

The Detroit Diesel Series 71 has been a cornerstone in the diesel engine market since its inception in 1938. This series includes both inline and V configurations, with a displacement of 71 cubic inches per cylinder. The engines are renowned for their durability, making them popular in various sectors, including transportation and marine applications.

One of the key features of the Detroit Diesel Series 71 is its two-stroke operation, which allows for a more efficient power output compared to four-stroke engines. This efficiency makes it a preferred choice for heavy-duty trucks, buses, and even marine vessels. The series has been utilized extensively during World War II, showcasing its reliability under extreme conditions.

The versatility of the Series 71 allows for numerous configurations, accommodating different power needs and environmental conditions. Whether for transportation or industrial use, these engines have demonstrated exceptional performance across various applications.

How does a 671 Detroit Diesel engine compare?

When comparing the 671 Detroit Diesel engine to other models in the Series 71, several factors come into play. The 671 engine is particularly recognized for its balance of power and efficiency, making it suitable for a wide range of applications.

The key advantage of the 671 engine lies in its power output capabilities. Available in configurations like non-turbo and turbocharged, it can produce between 160 and over 300 horsepower. This range provides flexibility for users who need a dependable engine for different tasks, from powering trucks to marine applications.

Another feature that sets the 671 apart is its ability to operate efficiently at lower RPMs, which contributes to its longevity and reliability. This capability is beneficial for applications where consistent performance is crucial, such as in marine engines where the load can vary significantly.

What are the specifications of the 671 Detroit Diesel engine?

The specifications of the 671 Detroit Diesel engine highlight its versatility and robust design. Here are some key specifications:

• Cylinder Configuration: Inline 6-cylinder
• Displacement: 71 cubic inches per cylinder
• Power Output: Ranges from 160 to over 300 HP depending on configuration
• Fuel Type: Diesel
• Weight: Approximately 1,400 lbs

These specifications make the 671 engine a popular choice not only in the automotive industry but also in marine applications. Its lightweight design allows for easier installation in various vehicles, while the power output ensures it can handle heavy loads effectively.

In terms of performance, the 671 engine is known for its reliability and efficiency, which are critical for commercial users. Its design allows for maintenance without extensive downtime, further enhancing its appeal in competitive markets.

What are the common problems with the 671 Detroit Diesel engine?

While the 671 Detroit Diesel engine is celebrated for its performance, it is not without its issues. Understanding these common problems can help users avoid potential pitfalls.

One of the most frequently reported issues is related to the fuel injection system. Clogged injectors can lead to reduced performance and efficiency, making regular maintenance essential. Users should ensure they are using clean fuel and regularly check and clean the injectors to maintain optimal performance.

Overheating is another concern for the 671 engine. This can be caused by a variety of factors, including insufficient cooling system maintenance or a faulty thermostat. Regularly checking the coolant levels and ensuring the cooling system is functioning properly is crucial to preventing overheating.

Lastly, oil leaks can occur as the engine ages. While not immediately catastrophic, they can lead to more significant issues if left unchecked. Regular inspections can help identify leaks early, allowing for timely repairs.

What is the horsepower range for the 671 Detroit Diesel engine?

The horsepower range for the 671 Detroit Diesel engine is quite broad, catering to various applications. Typically, the engine produces between 160 to over 300 horsepower, depending on the specific configuration.

This wide range allows users the flexibility to choose the right setup for their needs. For example, commercial trucks may require engines closer to the 300 HP mark for heavy loads, while lighter applications may only need the lower end of the spectrum.

Additionally, the presence of turbocharged options in the 671 family significantly enhances its power output. Turbocharging can enable users to achieve higher horsepower without increasing the engine size, making it an attractive choice for many applications.

What is the price of a 671 Detroit Diesel engine?

The price of the 671 Detroit Diesel engine can vary widely based on several factors, including condition, configuration, and whether it is new or used. Generally, prices for used engines can range from $3,000 to $10,000, while new engines may cost significantly more.

When considering the purchase, it's essential to factor in the potential for maintenance and repairs. A well-maintained engine may have a higher upfront cost but could save money in the long run due to reduced repair needs and increased reliability.

It's also advisable to explore various sources when looking for a 671 Detroit Diesel engine for sale. Online marketplaces, specialty engine suppliers, and auctions can provide a range of options and prices, allowing buyers to find the best deal that suits their requirements.

What torque does the 6-71 Detroit Diesel engine generate?

The torque output of the 6-71 Detroit Diesel engine is another significant aspect to consider. Typically, the 6-71 engine generates around 420 to 600 lb-ft of torque, depending on the specific configuration and tuning.

This torque range is beneficial for applications requiring substantial pulling power, such as heavy trucks or marine vessels. The high torque at lower RPMs allows for better performance in demanding conditions, making the 6-71 a favorite among professionals in various fields.

Users should also consider that the torque characteristics can be influenced by factors such as turbocharging and modifications. Thus, understanding the engine's specific configuration is crucial for optimizing performance.

What are the different models of the Detroit Diesel 2 stroke engine?

The Detroit Diesel 2 stroke engine family includes several notable models, each catering to different applications and power requirements. Among these, the following stand out:

1. Detroit Diesel 6-71
2. Detroit Diesel 8-71
3. Detroit Diesel 12-71
4. Detroit Diesel 16-71
5. Detroit Diesel 4-71

Each model offers varying configurations and power outputs, ensuring users can find an engine that meets their specific needs. The 6-71, in particular, is renowned for its balance of performance and efficiency, making it a versatile option for both automotive and marine applications.

The legacy of the Detroit Diesel 2 stroke engines continues to thrive, with many still in operation today, demonstrating their durability and performance across various industries.

Related questions about the 671 Detroit Diesel engine

What is the horsepower of a 671 Detroit Diesel?

The horsepower of a 671 Detroit Diesel engine typically ranges from 160 to over 300 HP. This variation depends on the engine's specific configuration, allowing it to meet different power requirements for various applications.

Users can choose between naturally aspirated and turbocharged versions, which can significantly impact the power output. Turbocharged variants generally offer higher horsepower, making them suitable for applications requiring more power.

Is the Detroit Diesel 671 a good engine?

Yes, the Detroit Diesel 671 is widely considered a good engine, known for its reliability and performance across various applications. Its robust design and ease of maintenance contribute to its popularity among users in transportation and marine industries.

Many users appreciate its longevity and efficiency, making it a cost-effective choice in the long run. The engine's ability to perform well in diverse conditions further enhances its reputation as a dependable option.

What engine is the Screaming Jimmy?

The term "Screaming Jimmy" refers to the Detroit Diesel 671 engine. This nickname came about due to the distinctive sound of the engine, which is a characteristic of its two-stroke design.

The Screaming Jimmy is particularly popular in heavy-duty trucks and other applications where high performance is required. Its unique sound and powerful performance have made it an iconic engine in the diesel community.

What is the difference between 6v71 and 6 71?

The difference between the 6v71 and 6 71 primarily lies in the configuration and designation. The "v" in 6v71 denotes a V configuration, while "6 71" typically refers to the inline configuration.

Both engines belong to the Detroit Diesel 2 stroke family, but they offer different performance characteristics based on their configurations. The V configuration tends to be more compact, making it suitable for applications with space constraints, while the inline version is often favored for its simplicity and ease of maintenance.

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