Jeep · Willys Hurricane
Jeep F134 Hurricane
The F-head evolution of the Go-Devil that powered CJs, military Jeeps, FCs, wagons and trucks.
134.2
Cubic inches
Moving the intake valves into the cylinder head improved airflow and compression while retaining the Go-Devil's familiar bottom-end dimensions.
Displacement
134.2 ci
Bore
3.125"
Stroke
4.375"
Years
1950–1971
Key Takeaway
The F134 Hurricane kept the same 3.125-inch bore and 4.375-inch stroke as the Go-Devil but moved the intake valves into the cylinder head. The resulting F-head layout improved breathing and compression while preserving the rugged bottom-end dimensions of the earlier L134.
Technical Specifications
- Compression
- 6.9:1 to 7.4:1 common Jeep specifications
- Horsepower
- 72–75 hp gross @ 4000 rpm
- Torque
- 112–114 lb-ft @ 2000 rpm
- Architecture
- F-head inline four
- Block
- Cast iron
- Cylinder heads
- Cast iron
- Valvetrain
- F-head / intake-over-exhaust
- Aspiration
- Naturally aspirated
- Fuel delivery
- Single-barrel carburetor
The F134 Hurricane kept the same 3.125-inch bore and 4.375-inch stroke as the Go-Devil but moved the intake valves into the cylinder head. The resulting F-head layout improved breathing and compression while preserving the rugged bottom-end dimensions of the earlier L134.
Internal Specifications
Variant-specific values are labeled. Engine families that span multiple years or RPOs can have different heads, cams, induction and rotating parts, so the exact code/year always takes priority.
Notable Applications
Strengths
- Better breathing than L134
- Excellent off-road low-speed manners
- Long production run
Weaknesses / Watch-outs
- Tall F-head package
- Still modest highway power
- Three-main-bearing architecture
Common Upgrades
- Electronic ignition
- Carburetor tuning
- Exhaust improvements
Racing History & Legacy
The F134 carried Jeep’s original four-cylinder lineage deep into the CJ era. Its long production run and broad use across civilian, military, and Forward Control models made it one of the foundational engines of postwar Jeep history.
References & Image Credit
Engine image: CZmarlin (Christopher Ziemnowicz) · Public domain · source
Engineering Notes Worth Knowing
134.2 cu in / 2.2 L with 3.125 x 4.375-inch bore and stroke.
F-head intake-over-exhaust valvetrain with cast-iron block and head.
Common Jeep ratings were about 72–75 hp gross and 112–114 lb-ft.
Used in CJ-3B, CJ-5, CJ-6, M38A1, FC-150, Willys Wagon, and Willys Pickup.
History · context · related reading
The Story Behind Jeep F134 Hurricane
Jeep needed more breathing and power without abandoning the proven dimensions of the Go-Devil family. The Hurricane answered by moving the intake valves overhead, creating a taller but more efficient engine that stayed in Jeep service for more than two decades.
TorqueList Garage Reference Series
See this engine inside the full Jeep reference catalog.
The same Engine Library data now powers a more detailed mobile-friendly catalog with technical specs, variants, engineering notes, history and related stories.