Originally produced in 1975 through a collaboration between Caterpillar and Ford, the Cat 3208 diesel engine was extremely popular through its entire production run, which lasted into the early 1990s. The engine was used in heavy trucks, including tractor trailers, garbage trucks, school buses and construction equipment. The engine was also used in power plant and marine applications. Use of the engine was widespread and its performance was reliable; as a result, many 3208-equipped vehicles remain in service long after production of the engine ceased.
Configuration
The 3208 is an eight-cylinder, four-stroke diesel engine with a V-8 configuration. It has a 114.3-millimeter bore and a 127-millimeter stroke. Different variations of the engine weigh between 722 and 899 kilograms. The engine displaces 10.4 liters. It has a cooling system capacity of between 47.3 and 56 liters and a lube oil system capacity of between 12 and 15 liters.
![]() Power
Three versions of the 3208 engine have varying power ratings. The version with the lowest power produces 210 horsepower, the mid-range version produces 375 horsepower and the most powerful version produces 435 horsepower.
![]() Compression Ratio
The compression ratio for the 210- and 375-horsepower versions of the 3208 is 16.5:1. The compression ratio of the 435-horsepower version is 15.5:1.
Other Details
The 3208 has a forged steel crankshaft, and early versions had a cast iron camshaft, which was replaced with a steel camshaft in later versions. Both turbocharged and non-turbo versions of the engine were produced.
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The Cat 3408 is a high-speed, industrial engine from Caterpillar Incorporated that is no longer in production. According to Pro Vehicles, the 3408 can power a variety of vehicles, including yachts, ships, loaders and trucks. Workers use trucks with 3408 engines for hauling heavy loads to and from construction sites as well as for hauling coal out of mines.
Diesel
Dell sd card reader not working. The Cat 3408 is a diesel internal combustion engine. A report on the Georgia State University website notes that, unlike an Otto cycle engine, which uses a spark plug to ignite gasoline fuel, a diesel engine uses compression to generate intense heat that causes the combustion of diesel fuel. Gasoline fuel and diesel fuel are both derivatives of crude oil.
Electrical Power
As Pro Vehicles notes, the Cat 3408 can generate a maximum electrical power of 266 kilowatts (kW). A single kW is equal to 1,000 watts.
Horsepower
Horsepower is a unit of work. The Cat 3408 can achieve a maximum of 447 to 520 horsepower. One unit of horsepower is equal to 550 foot-pounds per second, or 745.7 watts.
Operation Duration
The Cat 3408 has a life expectancy of approximately 16,000 operating hours, which is a little less than two years if the engine were run non-stop.
Cylinders
According to the BoatDiesel website, the Cat 3408 is an eight-cylinder engine. This means the engine has eight piston chambers, each of which has a corresponding piston that pumps up and down inside of it. In general, the more cylinders an engine has, the more powerful the engine.
Displacement
Displacement is another indicator of an engine's power. The Cat 3408 has a displacement of 18.0 liters, which is equivalent to 18,000 cubic centimeters or 1,098.4 cubic inches.
![]() Turbocharger
Total character makeover cbbe. Before igniting fuel and causing pistons to fire, internal combustion engines must take in oxygen to mix with the fuel. While some types of engines rely on the natural flow of air for this purpose, the Cat 3408 utilizes a specialized compressor known as a turbocharger. The turbocharger pumps higher amounts of air into cylinders during combustion, allowing for a higher power output.
Fuel Injection
The Cat 3408 relies on a hydraulically actuated, electronically controlled unit injector (HEUI) system for transporting diesel fuel from a storage tank to its eight cylinders. The HEUI system functions by pulling fuel from the tank with a pump that generates both low and high pressure. After the fuel passes through a filter, water separator and heating apparatus, the system sends fuel into the cylinders using a series of injectors.
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The C15 is a heavy-duty diesel engine manufactured by Caterpillar. It is intended for fleet and line haul use. Caterpillar has won the J.D. Power and Associates award for 'Highest in Customer Satisfaction with Vocational Heavy Duty Diesel Engines' six times. According to Caterpillar, no other engine manufacturer has received this award once.
Specifications
The Caterpillar C15 is an in-line, six-cylinder diesel engine. The bore by stroke ratio is 5.4 inches by 6.75 inches, or 137 mm by 171 mm. The displacement is 15.2 liters, or 928 cubic inches. The power rating when used in a truck or bus is 435 to 625 horsepower at 2,100 rpm; RV and fire truck ratings are 600 to 625 horsepower at 2,100 rpm. The total torque output is 1,550 to 2,050 foot-pounds at 1,200 rpm. Total weight of the engine is 3,090 pounds.
Equipment
The C15 features the Caterpillar Air Management, Precision Combustion, Advanced Electronics and Effective Aftertreatment -- ACERT -- technology, which improves fuel economy, reduces emissions and ensures power performance. ACERT consists of a clean-induction technology, a variable-valve actuation turbocharger, an electronic control module and a diesel-particulate filter. The engine also features the ADEM A4 electronics system, which has three times the memory and five times the processing speed of the ADEM 2000. The engine sports a single-piece steel-piston four-bolt connecting rod and a high-efficiency water pump to provide reliability and durability.
Features
According to Caterpillar, 'laboratory tests and engine disassembly analyses indicate the Cat C15 engines are expected to have a B50 life of one million miles with Cat's recommended maintenance.' The C15 was built to be compliant with the 2007 Environmental Protection Agency's diesel emissions regulations. A compressor brake is available on the C15, and it is designed to allow for a simple after-purchase modification to increase horsepower.
Weight and Gearing Considerations
When equal to or less than a gross combination weight -- GCW -- of 80,000 pounds, a truck with 1,750 foot-pounds should have an axle ratio of 1,400 rpm at 65 mph. When over 90,000 pounds GCW, a truck should be geared at 1,500 to 1,650 rpm at cruise speed.
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