The engine used in the 1/4-ton 4 x 4 Truck is the 4-cylinder, L-head, gasoline-type (figs. 1, 2, and 3), equipped with a counter-balanced crankshaft.

I just love that "Go-Devil" Engine!

I just love that “Go-Devil” Engine!

Of all the WW2 pre-standardized jeeps it was the Willys that had the most powerful engine.

The camshaft is operated off the crankshaft through a timing chain. The oil pump and distributor operate off the camshaft.

Fig. 1 – Front View

Fig. 1 – Front View

 

Type ……………………………………………………….. L-head

Numbers of cylinders ……………………………… 4

Bore and stroke ………………………………………. 3.125 x 4.375 in.

Piston displacement ………………………………… 134.2 cu in.

Compression ratio ……………………………………. 6.48 to 1

Max. brake horsepower …………………………… 54 at 4,000

Compression (lb per sq in. at 185 rpm) ……. 111

SAE horsepower ………………………………………. 15.63

Maximum torque …………………………………….. 105 ft-lb at 2,000 rpm

Firing order ……………………………………………… 1-3-4-2

 

 

Fig. 2 – Left View (Driver Side)

Fig. 2 – Left View (Driver Side)

Fig. 3 – Right View (Passenger Side)

Fig. 3 – Right View (Passenger Side)

 

 

 

 

 

 

 

 

 

 

 

From TM 9-1803A, February 24, 1944.

The Complete WW2 Military Jeep Manual contains TM 9-1803A and other publications that should be of interest to WW2 jeep enthusiasts.

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