1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
The L134 "Go Devil" was a 4 cylinder that produced 60 horsepower and was nicknamed the “L134 "Go Devil"”. While the majority of automotive engines have the valves in the head, this engine was an L-Head design. That meant the valves were in the engine block. The L head engine is also known as a Flat Head Engine. A Flat Head engine can be identified by the absence of a valve cover over the engine head.
1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
Willys-Overland started using the F134 engine in the Jeepster in 1950. This engine was too tall to be used in the CJ3a so in 1953 Willys came out with the CJ3b with a higher hood to accommodate the taller F134 engine. The F134 was also used in the CJ5 and CJ6 until 1971.
The F134 engine was based on the L134 "Go Devil". The L134 "Go Devil" engine has all the valves in the engine block. The valves, spark plugs and much of the combustion chamber were off to the side of the pistons on the L134 "Go Devil". This gave the L134 "Go Devil" low compression. The L134 "Go Devil" was redesigned by moving the intake valves up on top of then engine in the head. This redesigned engine was the F134.
It is a common misunderstanding that the F-head engine is short for Flat Head engine. This is incorrect. The F134 engine is not a Flat Head engine. The F designation comes from the shape of the intakes. Unlike the L134 "Go Devil" the F134 has the intake in the head and the exhaust ports in the engine block. The ports coming into the combustion chamber at 2 different heights gives an F shape (you have to use your imagination). This F Head engine design is very uncommon. Older engines often used a flat head design such as the L134 "Go Devil". Newer engines use overhead cams. The F134 was built during the transition from flat head design to OHV design. The F134 has intake valves in the head and exhaust valves in the engine block.
1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
From 1961 to 1965 the Perkins Diesel was used in some of the CJ5 and CJ6 Jeeps. This four cylinder was a British made engine. It is a very rare engine for the CJ. Less than 300 Jeeps had this engine installed.
1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
The GM Iron Duke was made by Pontiac from 1977 to 1993. It was only offered in CJs from ’80 to ’83. Even for a four cylinder the Iron Duke was not too powerful. The Iron Duke used a standard GM bell housing bolt pattern. Since the transmissions of these jeeps used a ford bolt pattern the bell housing could be used as a GM engine to Ford transmission adapter. In theory you could bolt a GM V8 in place of the Iron Duke. The problem is the Iron Duke always had a weak transmission behind it that can’t really hold up to any V8.
Unlike the AMC 150 four cylinder engine, the iron duke has the intake on one side and the exhaust on the other. When installed in a CJ the Iron Duke had a Rochester two barrel carburetor.
The 151 Iron Duke picture from cardomain.com
Bore - 4.0 inches
Stroke - 3.0 inches
Displacement - 151 CI (2.5L)
Compression Ratio - 8.2:1
Horsepower - 82
Torque - 125
Main Bearings - 5
1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
When AMC bought the Kaiser Jeep company the four cylinder engine installed in the CJ was the GM Iron Duke. AMC decided it would be better to make their own four cylinder. The AMC 150 (2.5L) four cylinder engine was made from the AMC 258 strait 6. The AMC 150 was used in the Jeep CJ7 from 1984 to 1986.
The AMC 150 has the intake and the exhaust on the left side of the engine. The 150 used a carburetor until 1986.That year the 150 received throttle-body fuel injection.
This AMC 150 belongs to Fatbook from Jeepforum.com
Notice how the AMC 150 has the intake and exhaust on the left side of the engine.
1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
Some CJ7s from 1980 through 1982 came with the Isuzu C240 Diesel four cylinder engine. These engines were built at a General Motors factory in Ohio (GM owns Isuzu). These Isuzu powered CJ7s were built for export only. The C240 Diesel was mated to the T176 transmission.
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