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INTERNATIONAL HARVESTER HEAVY-DUTY TRUCK 399.IH8975 Inthty Engine 448467

fits year: 1975.

399.ih8975 International Harvester - Heavy-duty Truck Inthty 1975 Engine Parts Misc 448467

( Brand: International Harvester Heavy-duty Truck ), ( Model: INTHTY ), ( Part Type: Engine ), ( Genuine Oem: Yes ), ( Ipn: 399.ih8975 ), ( Make: International )

Review INTERNATIONAL HARVESTER HEAVY DUTY TRUCK Inthty Engine Parts Misc fits 1975

International Harvester Heavy-Duty 399.IH8975 INTHY 1975 Engine

The International Harvester Heavy-Duty 399.IH8975 INTHY 1975 engine is a remarkable piece of machinery that boasts an impressive history in the realm of heavy-duty powertrains. This engine is a six-cylinder, inline diesel engine, which was widely used in various International Harvester agricultural and construction equipment during the 1970s.

The engine block of the 399.IH8975 INTHY is made from a high-strength, cast iron material, ensuring excellent durability and longevity. The cylinder bore is 4.34 inches, while the stroke length measures 5.5 inches, resulting in a total displacement of 399 cubic inches. The engine's compression ratio is 17.5:1, which is quite remarkable for a diesel engine of this era.

The engine is fueled by diesel and features a naturally aspirated intake system. The combustion process is initiated by a Bosch mechanical fuel pump, which delivers fuel to a Bosch high-pressure fuel pump. This pump, in turn, pressurizes the fuel to approximately 2,000 psi for injection into the engine's combustion chambers. The engine utilizes a Bosch common rail fuel system, which was a cutting-edge technology for its time, providing excellent fuel atomization and efficient combustion.

The 399.IH8975 INTHY engine generates a maximum power output of 170 horsepower at 2,400 RPM and a peak torque of 455 lb-ft at 1,400 RPM. This engine delivers a substantial amount of power, making it suitable for heavy-duty applications, such as agricultural equipment, construction machinery, and industrial applications.

The cooling system of the engine consists of a heavy-duty, cross-flow radiator, which is designed to dissipate heat efficiently. The engine also features a thermostatically-controlled cooling fan, which ensures optimal operating temperatures for the engine during various operating conditions.

The engine's exhaust system utilizes a two-valve, high-pressure, air-to-air aftercooling system, which provides efficient cooling of the engine's exhaust gases. This system enhances the engine's overall performance and fuel efficiency by reducing the exhaust gas temperature, which, in turn, improves the combustion process.

The 399.IH8975 INTHY engine is equipped with a full-pressure lubrication system, which ensures that all moving parts are adequately lubricated for smooth and efficient operation. The engine also features a heavy-duty timing gear and a heavy-duty crankshaft, which contribute to the engine's durability and reliability.

The engine is designed to be easily accessible for maintenance, with components arranged in a logical and convenient manner. The engine's serviceability is further enhanced by the use of readily available, standard parts, making it a cost-effective and practical choice for those who require a heavy-duty, high-performance engine.

In conclusion, the International Harvester Heavy-Duty 399.IH8975 INTHY 1975 engine is a testament to the engineering prowess of the International Harvester Company during the 1970s. With its robust design, impressive power output, and excellent fuel efficiency, this engine continues to be a popular choice among collectors, restorers, and those who require a heavy-duty powertrain for their agricultural, construction, or industrial applications.

The International Harvester Heavy-Duty 399.ih8975 INTHTY 1975 engine is a diesel engine that was commonly used in heavy-duty applications, such as construction equipment and agricultural machinery. Here are some pros and cons of buying this engine.

Pros:

1. Durability: These engines were known for their robust design and long service life. They were built to withstand heavy use and harsh operating conditions.

2. Power: The 399.ih8975 engine produced a significant amount of power, making it an ideal choice for heavy-duty applications.

3. Fuel Efficiency: Compared to gasoline engines of similar power output, diesel engines like the 399.ih8975 are generally more fuel-efficient.

4. Availability of Parts: The International Harvester brand has a large and dedicated following, which means that parts for these engines are relatively easy to find.

Cons:

1. Complexity: Diesel engines can be more complex than gasoline engines, which can lead to higher maintenance costs and longer downtime for repairs.

2. Emission Regulations: Older diesel engines like the 399.ih8975 do not meet modern emission regulations, which can make it difficult to use them in certain applications or locations.

3. Noise and Vibration: Diesel engines can be noisier and more vibrant than gasoline engines, which can be a drawback for some applications or operators.

Conclusion:

The International Harvester Heavy-Duty 399.ih8975 INTHTY 1975 engine is a reliable and powerful option for heavy-duty applications where fuel efficiency is a priority. However, it comes with some drawbacks, such as complexity, noise and vibration, and the inability to meet modern emission regulations.

Recommendation:

If you are in the market for a heavy-duty engine and are considering the International Harvester 399.ih8975, it is important to weigh the pros and cons carefully and determine if the benefits outweigh the drawbacks for your specific application. If emission regulations are a concern, you may want to consider a newer, more modern engine that meets those regulations. Alternatively, you could consider rebuilding or reconditioning an existing 399.ih8975 engine to extend its life and improve its performance. Ultimately, the decision should be based on your specific needs, budget, and operating conditions.

Details:

specifications parthick:

  • for years: 1975
  • brand: International Harvester Heavy-duty Truck
  • model: Inthty
  • part type: Engine
  • genuine oem: Yes
  • ipn: 399.ih8975
  • make: International

shipping parthick:

  • cost: $13.35
  • type: Calculated
  • carrier: USPS
  • transit: 4-8 Days
  • class: Expedited
  • service: USPS Priority Mail

seller parthick:

  • # reviews: 3134
  • rating: 98.7%
  • city: New London, Minnesota

offer parthick:

  • options: Ship-to-home
  • availability: In Stock
  • sold: 0
  • quantity: 1
  • started: July 11, 2025

returns parthick:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Buyer

payments parthick:

  • other
  • credit card: Mastercard
  • wallet: Paypal

general parthick:

  • Commercial Truck Parts > Engine Cooling > Other Engine Cooling
  • condition: Used
for years: 1975, part type: engine, genuine oem: yes,
manufacturer: international, category: auto parts > commercial truck parts > engine cooling, sku: 9481681966210752,

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