Willys Overland Jeepster

Information Site and Registry 1948, 1949,1950

Jeepster Engines

 

1948 :INTRODUCED MAY 3 1948  4 CYL 63 HP L-HEAD ENGINE


1949 :MODEL 463 JEEPSTER REPLACED BY VJ-3 JEEPSTER ON JANUARY 10, 1949. AVAILABLE INCLUDED 134/L-4 (SAME AS 48) OR 148/L6.
 

1950 : OCTOBER 1949 TO MARCH 30, 1950 NO CHANGES FROM PREVIOUS YEAR MODEL. (SO A 1950 COULD BE A FLAT NOSE OR A V NOSE)
 

1950 BEGINNING APRIL MAJOR STYLING CHANGES (V NOSE) 4 CYL F/HEAD 134CU 72 HP ENGINE OR 6 CYL L/HEAD 161CU 90 HP WAS OFFERED..
 

1948 BODY STYLE=4 CYL L-HEAD
1949 BODY STYLE=4 CYL L-HEAD OR 6 CYL L-HEAD 148 CUBIC INCH
1950 BODY STYLE=4 CYL F-HEAD OR 6 CYL L-HEAD 161 CUBIC INCH

 

Above information provided by Cliff Wepf

From the book Collector's Library, Jeep by Jim Allen, page 224:
 "Called the "Lightning 6," the 161 cid 75 hp flathead (L-head) 6-cylinder was available. On L-161 the engine number was located on a boss on the upper front of the passenger side of the engine block. Beginning engine number was 2S10001 and continued consecutively, regardless of model year."

4 Cylinder L-Head Engine 4-63

 

6 Cylinder L-Head Engine 6-63 engine

F-Head - 4 Cylinder - end sectional view

Pictures from Willys-Overland Mechanics Manual

The engine although dependable, was an unspectacular power plant. The following are its specifications. Used in the MB,GPW,CJ2A,CJ3A and Early trucks and wagons. From about 1947 until 1955, the slightly modified L-Head was used in the Pickup and Wagons. It had a different carburetor (Carter 626 1 barrel) and has an inproved compression ratio*.

L-Head 134 4 Cylinder
Bore x Stroke
3.125" x 4.375"
Displacement
134.2 ci(2.2L)
Compression Ratio
6.48:1THe old standard of Jeep since its production runs was the L-Head engine. So called because of its valve configuration,it proved to be a
Horsepower (gross)
60@4000rpm
Torque (gross)
105@2000
Main Bearings
3
Valve Configuration
L-head
Fuel
Carter WO-596S 1bbl downdraft

* L-Head 134 4 Cylinder
Bore x Stroke
3.125" x 4.375"
Displacement
134.2 ci(2.2L)
Compression Ratio
6.47:1
Horsepower (gross)
60@4000rpm
Torque (gross)
106@2000
Main Bearings 3
Valve Configuration
L-head
Carter 626 1bbl
 

The standard of Jeep since its production runs was the L-Head engine. because of its valve configuration,  The following are its specifications. Used in the MB,GPW,CJ2A,CJ3A and Early trucks and wagons. From about 1947 until 1955, the slightly modified L-Head was used in the Pickup and Wagons. It had a different carburetor (Carter 626 1 barrel) and has an improved compression ratio*.

L-Head 134 4 Cylinder
Bore x Stroke
3.125" x 4.375"
Displacement
134.2 ci(2.2L)
Compression Ratio
6.48:1
Horsepower (gross)
60@4000rpm
Torque (gross)
105@2000
Main Bearings
3
Valve Configuration
L-head
Fuel
Carter WO-596S 1bbl downdraft

* L-Head 134 4 Cylinder
Bore x Stroke
3.125" x 4.375"
Displacement
134.2 ci(2.2L)
Compression Ratio
6.47:1
Horsepower (gross)
60@4000rpm
Torque (gross)
106@2000
Main Bearings 3
Valve Configuration
L-head
Carter 626 1bbl

Some Nomenclature

 The A, B, AB refer to over/undersize bore and bearing journals on a
 factory engine. They are located after the serial number stamped on
 the engine and are pretty rare to come across. The numbers cast into the block  are in no way related to these letter
 codes for under/oversized engines. The 614087 is a Willys part number. Other codes refer to such things as which factory, which mold, and when the block was cast.

Not sure where this nomenclature information came from I just found this note posted on my website.