EMD 567

The EMD 567 is a line of diesel engines built by General Motors' Electro-Motive Division. This engine, which succeeded Winton's 201-A, was used in EMD's locomotives from 1938 until its replacement in 1966 by the EMD 645. It has a bore of 8.5 in (216 mm), a stroke of 10 in (254 mm) and a displacement of 567 cu in (9.29 L) per cylinder. Like the 201-A, the EMD 645 and the EMD 710, the EMD 567 is a two-stroke cycle engine. It is a V engine with an angle of 45° between cylinder banks. The 710, 645 and 567 are the only two-stroke engines commonly used today in locomotives.

567AC engines (an "A" block upgraded to "C" block specifications) and 567BC engines (a "B" block upgraded to "C" block specifications), as well as 567C and 567D engines, may be upgraded to use 645 power assemblies, theoretically achieving an increase in horsepower, although not without corresponding changes to the engine's Woodward governor which activates and controls the engine's "fuel rack", although this power increase is generally not recommended.

As 645 power assemblies are more readily available than 567 power assemblies, this upgrade may also be employed in so-called "life extension" programs, in which case the power assemblies would be upgraded, and the engine may be de-tubo-ed, without corresponding changes to the engine's Woodward governor, hence without a corresponding power increase.

Because of their age, 567 engines are generally exempt from emissions rules. EMD manufactures a special series of 645 power assemblies which are particularly useful in updating these exempt 567 engines and also certain exempt 645 engines.

EMD's chief competitor, GE, now makes EMD-compatible replacement parts.