The Willys L134 (nicknamed Go Devil) is a

straight-4 A straight-four engine (also referred to as an inline-four engine) is a four-cylinder piston engine where cylinders are arranged in a line along a common crankshaft. The majority of automotive four-cylinder engines use a straight-four layout ( ...

flathead

automobile engine There are a wide variety of propulsion systems available or potentially available for automobiles and other vehicles. Options included internal combustion engines fueled by petrol, diesel, propane, or natural gas; hybrid vehicles, plug-in hybr ...

that was made famous in the

Willys MB The Willys MB and the Ford GPW, both formally called the U.S. Army truck, ton, 4×4, command reconnaissance, commonly known as the Willys Jeep, Jeep, or jeep, and sometimes referred to by its List of U.S. military vehicles by supply catalog des ...

and Ford GPW Jeep produced during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. It powered nearly all the Jeep vehicles built for the U.S. and Allies. It was later used in a variety of civilian Jeep vehicles.

History

In 1940, the Willys Quad was built to compete against the Bantam reconnaissance car for evaluation by the U.S. Army. The two prototype Quads were powered by the Willys “Go-Devil” engine that turned out to be the automaker's greatest asset. Willys' pilot vehicle was overweight compared to the Army's requirements, but the "Go Devil" engine rated at included a heavier transmission, a combination that proved to be beneficial in the long-run for use in cross-country travel. The engine was developed by Willys' Chief Engineer, Delmar "Barney" Roos, and was the most powerful of the three prototype vehicles evaluated by the U.S. Army for production. Roos took the "less than impressive" automobile engine and increased its performance and durability. The specifications by the

Quartermaster Corps Following is a list of quartermaster corps, military units, active and defunct, with logistics duties: * Egyptian Army Quartermaster Corps - see Structure of the Egyptian Army * Hellenic Army Quartermaster Corps (''Σώμα Φροντιστών ...

called for only of torque at the rear axle. The extra power made it the engine of choice for the U.S. Army. The

engine displacement Engine displacement is the measure of the cylinder volume swept by all of the pistons of a piston engine, excluding the combustion chambers. It is commonly used as an expression of an engine's size, and by extension as an indicator of the ...

was with a bore and stroke, a very

undersquare Stroke ratio, today universally defined as bore/stroke ratio, is a term to describe the ratio between cylinder bore diameter and piston stroke length in a reciprocating piston engine. This can be used for either an internal combustion engine ...

design. It was an

L-head A flathead engine, also known as a sidevalve engine''American Rodder'', 6/94, pp.45 & 93. or valve-in-block engine, is an internal combustion engine with its poppet valves contained within the Cam-in-block, engine block, instead of in the cyl ...

design, with

valves A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings, ...

parallel with the cylinders. Initial power output was at 4000 rpm and of torque at 2000 rpm with 6.48:1 compression. The L134 was phased out by the F-head Willys Hurricane engine beginning in 1950.

Applications

*1937–1942 Willys Americar *1941–1945

*1941–1945 Ford GPW *1944–1945 Willys-Overland CJ-2 *1945–1949 Willys-Overland CJ-2A *1946–1950 Willys Jeep Station Wagon in which it was rated at *1949–1953 Willys-Overland CJ-3A *1948–1950

Willys-Overland Jeepster The Jeepster is an automobile originally produced by Willys-Overland Motors from 1948 until 1950. It was developed to fill a gap in the company's product line, crossing over from their "utilitarian" proto SUVs and trucks to the passenger aut ...

*1950–1952

Willys M38 The Willys MC, formally the -Ton, 4 x 4, Utility Truck M38, or the List of U.S. military vehicles by supply catalog designation#G700 to G799, G740 by its U.S. Army List of U.S. Army weapons by supply catalog designation, Standard Nomenclature su ...

*1950–1954

Henry J The Henry J is an American automobile built by the Kaiser-Frazer Corporation and named after its chairman, Henry J. Kaiser. Mass production, Production of six-cylinder models began in their Willow Run factory in Michigan in July 1950, and four- ...

*1952–1954 IAME Rastrojero *1956–1965 Willys DJ-3a *1956–1965

Hotchkiss M201 The Hotchkiss M201 was the standard Military light utility vehicle, light utility vehicle used by the French army from shortly after the second World War until it began retiring them from French service in the 1980s. It started in 1955 as a Wil ...

(Willys MB produced under licence in France)

References

{{Reflist Go Devil Gasoline engines by model Straight-four engines