Home
Index of Opie Bennett


Jeep Tech
Need Help or Ideas? Look Here


My Jeep
My Jeep info and write ups


Theatre
Technical Theatre Info


Boy Scouting
My Boy Scout Career


Nebraska Life
Life as a College Student at UNL


Trips
Trips and pics
 Updated Oct 26


Me
My Stuff (resume and the like)


Links
Favorite Links
Jeep Engine Specs


This is a list of Jeep Engine specs and the models that thoes engines came in. I have found these listed on other sites and cannot be sure of their correctness, but if you notice any errors, please tell me via e-mail, and i will validate the new information and post it here. Thanks.
Almost all of this info comes from here.



287(4.7L) V8
360(5.9L) V8
318(5.2L) V8
242(4.0L) I6
150(2.5L) I4
173(2.8L) V6
GM 151 I4
AMC 401 V8
AMC 360 V8
AMC 304 V8
AMC 258 I6
AMC 232 I6
"Dauntless" 350 V8
"Dauntless" 225 V6
"Vigilante" 327 V8
"Tornado" 230 I6
Perkins 192 I4
"Hurricane" 226 I6
"Hurricane" 134 I4
"Go Devil" 134 I4






4.7L V8
The 287 (4.7L) V8 is used in the '99 Grand Cherokee.

4.7L V8
Bore x StrokeNA
Displacement287 (4.7L)
Compression RatioNA
Horsepower (gross)230
Torque (gross)295
Main BearingsNA
Valve ConfigurationNA
FuelNA



Return to top




5.9L V8
The 360 (5.9L) V8 is an optional engine for the '98 Grand Cherokee. It uses a cast iron block and cylinder head, hydraulic lifters, and 5 main bearings.

5.9L V8
Bore x Stroke4.00" x 3.58"
Displacement360 (5.9L)
Compression Ratio8.9:1
Horsepower (gross)250@4000
Torque (gross)335@3200
Main Bearings5
Valve ConfigurationOHV
FuelMPI



Return to top




5.2L V8
The 318 (5.2L) V8 is an optional engine for the Grand Cherokee. It uses a cast iron block and cylinder head, hydraulic lifters, and 5 main bearings.

5.2L V8
Bore x Stroke3.91" x 3.31"
Displacement318 (5.2L)
Compression Ratio9.1:1
Horsepower (gross)230@4400
Torque (gross)300@3200
Main Bearings5
Valve ConfigurationOHV
FuelMPI


Return to top





4.0L I6
The 4.0L inline 6 (I6) engine was introduced in the Cherokee in the late 80s and in the YJ in 1991. The cylinder design is based on the changes made to the fuel injected 2.5L I4 engine. The block and cylinder head are cast iron. It uses 7 main bearings and hydraulic lifters. The HP and torque gains are substantial over the older carbureted 258, but the peaks come at higher RPM. The fuel injected engine performs much better in off-camber, bouncy, and steep situations. It also calibrates better for changes in altitude. Fuel economy is also improved.

A good way to embarass yourself in front of your Jeeping friends is to refer to it as a V6. It isn't a V6, it is an inline 6 or I6. The "V" in V6 refers to the configuration of the pistons in the block. The only two V6 engines ever available from the factory in a Jeep are the 225 "Dauntless" Buick V6 in the late 60s and early 70s and the 2.8L GM V6 in 80s Cherokees and Comanches. If you are shopping for a Cherokee or Comanche, make sure you get the 4.0L and not the 2.8L engine, there is a world of difference.

The 4.0L engine used in the Wrangler from '91 until the present.

4.0L I6
Bore x Stroke3.88" x 3.41"
Displacement242 (4.0L)
Compression Ratio8.8:1
Horsepower (net)180@4750
Torque (net)220@4000
Main Bearings7
Valve ConfigurationOHV
FuelMPI

The 4.0L I6 that is used in the XJ and ZJ is rated slightly higher than the YJ and TJ 4.0L engine probably due to a different exhaust system.

4.0L I6
Bore x Stroke3.88" x 3.41"
Displacement242 (4.0L)
Compression Ratio8.8:1
Horsepower (net)185@4750
Torque (net)220@4000
Main Bearings7
Valve ConfigurationOHV
FuelMPI



Return to top




AMC 150 I4
The 2.5L inline 4 (I4) engine used in Jeeps today was first introduced in '84 when Jeep was owned by AMC. Originally, the engine used a carburetor, later versions used throttle body fuel injection, and the current version uses multi-port fuel injection. The fuel induction has been the major change with this engine over the years. The 2.5L uses over head valves with hydraulic lifters and a cast iron block and cylinder head.

The current version of the 2.5L I4 engine uses multi-port fuel injection. This engine is the standard engine used in the Wrangler (TJ) and Cherokee (XJ). It was the standard engine in the Wrangler (YJ) since 1991. The XJ version of the 2.5L has a slightly higher output.

AMC 150 I4
Bore x Stroke3.88" x 3.19"
Displacement150ci (2.5L)
Compression Ratio9.1:1
Horsepower (net)123@5250
Torque (net)139@3250
Main Bearings5
Valve ConfigurationOHV
FuelMPI

The TBI version of the 2.5L was used in '87-'90 Wrangler YJs.

AMC 150 I4
Bore x Stroke3.88" x 3.19"
Displacement150ci (2.5L)
Compression Ratio9.2:1
Horsepower (net)117@5000
Torque (net)135@3500
Main Bearings5
Valve ConfigurationOHV
FuelTBI

This carbed version of the AMC 150 I4 was introduced as the standard engine in '84-'86 CJ-7s.

AMC 150 I4
Bore x Stroke3.88" x 3.19"
Displacement150ci (2.5L)
Compression Ratio9.2:1
Horsepower (net)105@5000
Torque (net)132@2800
Main Bearings5
Valve ConfigurationOHV
Fuel1bbl


Return to top





GM 173(2.8L) V6
The 2.8L V6 engine uses a cast iron block and cylinder head with hydraulic lifters and over head valves. It was first introduced as an optional engine in the little Cherokee (XJ) and it was later used in the Comanche (MJ). The engine was built by GM and a similar engine was used in many GM cars and trucks.

GM 173(2.8L) V6
Bore x Stroke3.50" x 2.99"
Displacement173(2.8L)
Compression Ratio8.5:1
Horsepower (net)115@4800
Torque (net)145@2400
Main Bearings4
Valve ConfigurationOHV
Fuel2bbl Rochester


Return to top





GM 151
The 151 (2.5L) inline 4 engine was used in '80-'83 CJs including the CJ-8, CJ-7, and CJ-5. The 151 is often called the "Iron Duke", but is actually a Pontiac engine designed to replace the Chevy "Iron Duke" I4 engine. The engine does have the Chevy bell housing bolt pattern though. The engine is manufactured by GM and uses a cast iron block and cylinder head with hydraulic lifters and 5 main bearings. The 151 cetainly is not a screamer, the AMC I4 has much better HP and torque ratings.

The neat part about the engine is it has the same bell housing bolt pattern as a Chevy small block. The bell housing makes a great low buck Ford/Jeep to Chevy adapter since it is basically Ford on the transmission side and Chevy on the engine side. A regular Chevy bell housing will bolt to the 151, so if you plan a transmission swap, a Chevy transmission would be the way to go. Also, a Chevy 305 or 350 will bolt right to the Iron duke bell housing. The down side of dropping in a V8 is most transmissions used with the Iron Duke are light weight units.

The GM 151 has the intake and exhaust manifolds on opposite sides of the cylinder head, but the AMC 150 has the intake and exhaust manifolds on the same side of the cylinder head. The picture at the top of the page is the passenger side with the intake manifold and carb. The drivers side is pictured below with the exhaust manifold removed.

GM 151
Bore x Stroke4.00" x 3.00"
Displacement151 ci(2.5L)
Compression Ratio8.2:1
Horsepower (net)82@4000
Torque (net)125@2600
Main Bearings5
Valve ConfigurationOHV
FuelRochester staged 2bbl



Return to top




AMC 401 V8
The AMC 401 was introduced in 1974 as an optional engine for the J-series pickups and Wagoneers. It has a cast iron block and cylinder head with over head valves and hydraulic lifters.

>Bore x Stroke
AMC 401 V8
4.165" x 3.68"
Displacement401 (6.57L)
Compression Ratio8.35:1
Horsepower (net)215@4400
Torque (net)320@2800
Main Bearings5
Valve ConfigurationOHV
Fuel4bbl



Return to top




AMC 360 V8
The AMC 360 was introduced in 1971 in J-series pickups and Wagoneers. It has a cast iron block and cylinder head with over head valves and hydraulic lifters.

In 1971, the AMC 360 have very high rating. I would assume these are gross ratings and the later are net ratings.

AMC 360 V8
Bore x Stroke4.08" x 3.44"
Displacement360(5.89L)
Compression Ratio8.5:1
Horsepower (gross)245@4400
Torque (gross)365@2600
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl

In 1972, the 2bbl 360 is more conservatively rated, presumably these are net ratings.

AMC 360 V8
Bore x Stroke4.08" x 3.44"
Displacement360(5.89L)
Compression Ratio8.5:1
Horsepower (net)175@4000
Torque (net)285@2400
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl

In 1973, an optional 4bbl carburetor was available. The horsepower and torque ratings for this version are significantly better.

AMC 360 V8
Bore x Stroke4.08" x 3.44"
Displacement360(5.89L)
Compression Ratio8.5:1
Horsepower (net)195@4400
Torque (net)295@2900
Main Bearings5
Valve ConfigurationOHV
Fuel4bbl



Return to top




AMC 304 V8
The AMC 304 uses a cast iron block and heads with over head valves and hydraulic lifters. The AMC 304 was introduced in Jeep vehicles in 1971 in J-series pickups and Wagoneers and in 1972 in the CJ vehicles. Early 304s performed well, so well that frame changes were made to the CJs in '73 to prevent cracks.

Meeting legal requirements for smog controls on the 304 severely hurt performance of the engine. The last two years of the 304 in the CJ were in '80-'81. The horse power and torque specifications of the last version of the 304 narrowly beat the 258 use at this time. The 258 used between '80 and '81 was putting out 110 HP @ 3500 and 195 ft/lbs @ 2000.

The 304 used from '80-'81 in CJs, J-series pickups, and Wagoneers suffers in performance.

AMC 304 V8
Bore x Stroke3.75" x 3.44"
Displacement304(4.98L)
Compression Ratio8.4:1
Horsepower (net)125@3200
Torque (net)220@2400
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl

The '79 304 saw a significant drop in horse power from previous years.

AMC 304 V8
Bore x Stroke3.75" x 3.44"
Displacement304(4.98L)
Compression Ratio8.4:1
Horsepower (net)130@4200
Torque (net)245@2500
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl

The 304 used from '72-'78 has the best performance of all the 304s used in the CJ. The 304 was not offered in J-series pickups and Wagoneers after 1972.

AMC 304 V8
Bore x Stroke3.75" x 3.44"
Displacement304(4.98L)
Compression Ratio8.4:1
Horsepower (net)150@4200
Torque (net)245@2500
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl

The ratings for the 304 used in '71 J-series pickups and Wagoneers are gross ratings.

AMC 304 V8
Bore x Stroke3.75" x 3.44"
Displacement304(4.98L)
Compression Ratio8.4:1
Horsepower (gross)210@4400
Torque (gross)300@2600
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl


Return to top





AMC 258 I6
The AMC 258 was introduced in 1971 in J-series pickups and Wagoneers and in 1972 in CJs. It continued to be used through 1990 in the Wrangler. It is basically a stroked 232 engine. The great thing about this engine is it reliable, inexpensive, and has horse power and toque peaks at low RPM.

The 258 inline 6 (I6) engine always came from the factory carbureted any many people complain about the Carter BBD carburetor and the maze of emmissions vacuum hoses. There are a couple articles below that can help you sort through those hoses and tune the Carter BBD. For a carbureted engine, the 258 with the Carter BBD performs very well off road. The 258 always came with a cast iron block and cylinder head, hydraulic lifters (with non-adjustable rockers), and 7 main bearings.

The 258 used in '87-'90 Wrangler YJs uses a computer controlled Carter BBD. It is very simlar to the 258 used in '82-'86 CJs, but performance suffers due to emmission controls.

AMC 258 I6
Bore x Stroke3.75" x 3.90"
Displacement258 (4.2L)
Compression Ratio9.2:1
Horsepower (net)112@3200
Torque (net)210@2000
Main Bearings7
Valve ConfigurationOHV
Fuel2bbl Carter BBD

The 258 used in '82-'86 CJs used a computer controled Carter BBD. The computer controls mixture based on an O2 sensor and other sensors.

AMC 258 I6
Bore x Stroke3.75" x 3.90"
Displacement258 (4.2L)
Compression Ratio9.2:1
Horsepower (net)115@3200
Torque (net)210@1800
Main Bearings7
Valve ConfigurationOHV
Fuel2bbl Carter BBD

The 258 used in '79-'81 CJs, some used a 1bbl carb and some used a 2bbl carb.

AMC 258 I6
Bore x Stroke3.75" x 3.90"
Displacement258 (4.2L)
Compression Ratio8.3:1
Horsepower (net)110@3500
Torque (net)195@2000
Main Bearings7
Valve ConfigurationOHV
Fuel1bbl and 2bbl

The 258 used in '72-'78 CJs, J-series pickups, and Wagoneers, some used a 1bbl carb and lower compression than later 258s.

AMC 258 I6
Bore x Stroke3.75" x 3.90"
Displacement258 (4.2L)
Compression Ratio8.0:1
Horsepower (net)110@3500
Torque (net)195@2000
Main Bearings7
Valve ConfigurationOHV
Fuel1bbl

The 258 was introduced in 1971 as the standard engine in J-series pickups and Wagoneers.

AMC 258 I6
Bore x Stroke3.75" x 3.90"
Displacement258 (4.2L)
Compression Ratio8.5:1
Horsepower (gross)150@3800
Torque (gross)240@1800
Main Bearings7
Valve ConfigurationOHV
Fuel1bbl Carter or Holley

Other Information

258 Primer : Are you lost in a maze of vacuum hoses? Are having problems passing your state smog check? This article covers everything you need to know to fix and understand your 258.
Learning to Love Your 258: An easy fix for the most common idle problems with the 258(4.2L) engine used in Wranglers(YJ) and CJs.
Computer By-Pass: John Nutter's alternative ignition modification for the 4.2L engine.
Mopar Ignition Upgrade: Ignition upgrade for a more powerful 4.2L Jeep Engine.


Return to top




AMC 232 I6
The AMC 232 inline 6 uses a cast iron block and cylinder head with hydraulic lifters and 7 main bearings. It was the standard engine in CJs from '72-'78 and in '65-'70 J-series pickups and Wagoneers. It is hard to tell it from a 258 by looking at it.

The AMC 232 was the standard engine in '72-'78 CJs.

AMC 232 I6
Bore x Stroke3.75" x 3.50"
Displacement232 (3.8L)
Compression Ratio8.0:1
Horsepower (net)100@3600
Torque (net)185@1800
Main Bearings7
Valve ConfigurationOHV
Fuel1bbl

The AMC 232 was the standard engine in '65-'70 J-series pickups and Wagoneers.

AMC 232 I6
Bore x Stroke3.75" x 3.50"
Displacement232 (3.8L)
Compression Ratio8.5:1
Horsepower (gross)145@4300
Torque (gross)215@1600
Main Bearings7
Valve ConfigurationOHV
Fuel1bbl Carter or Holley



Return to top




Dauntless Buick 350 V8
The "Dauntless" Buick 350 V8 uses a cast iron block and cylinder heads with overhead valves and hydraulic lifters. The Buick 350 was used from 1969 until 1970 in J-series pickups and Wagoneers.

Dauntless Buick 350 V8
Bore x Stroke3.80" x 3.85"
Displacement350(5.73L)
Compression Ratio9.0:1
Horsepower (gross)230@4400
Torque (gross)350@2400
Main Bearings5
Valve ConfigurationOHV
Fuel2bbl


Return to top





Dauntless Buick 225 V6
The "Dauntless" 225 V6 engine was introduced in 1966 in the CJ and C101 models. The V6 configuration of the engine makes it very compact which is a big plus in tight Jeep engine compartments. Kaiser purchased the tooling to build the 225 from Buick and later, AMC sold the tooling back to Buick.

A desendent of this engine, the 231 (3.8L) V6, is used in GM cars to this day. The modernized and common 231 is a good canidate for replacing a blown 225. There are differences in the balancing of the engine though, so it can be tricky. The 225 is externally balanced and the 231 is internally balanced. This means you cannot just throw your 225 fly wheel on a 231, the 231 must be balanced.

The flywheel itself used with the 225 is not typical. The flywheels used in the Jeep vehicles are very thick and heavy to increase torque. The flywheels used in Buick cars are much lighter.

Since the 225 is a Buick engine, it uses the standard Buick bell housing. The standard Buick bell housing will bolt to a SM420, so this is probably the best transmission swap option for Jeeps equipped with this engine. The T-14 and T-86 3 speed transmissions used behind this engine are not known for their strength.

The Buick 225 uses a cast iron block and cylinder heads with mechanical lifters and 3 main bearings.

Dauntless Buick 225 V6
Bore x Stroke3.75" x 3.40"
Displacement225 (3.68L)
Compression Ratio9.0:1
Horsepower (net)160@4200
Torque (net)235@2400
Main Bearings3
Valve ConfigurationOHV
Fuel2bbl


Return to top





AMC 327 V8
The "Vigilante" AMC 327 V8 has a cast iron block and cylinder head with overhead valves and hydraulic lifters. The Vigilante was built by AMC and is not the popular Chevy 327 V8. The AMC 327 was used in Jeep full size trucks and Wagoneers from 1965 until 1968. AMC did not standardize engine bell housing bolt patterns until the early 70s, so as I understand it, the AMC 327 V8 does not have the same bell housing bolt pattern used in later AMC engines.

AMC 327 V8
Bore x Stroke4.00" x 3.25"
Displacement237 (5.35L)
Compression Ratio8.7:1
Horsepower (gross)250@4700
Torque (gross)340@2600
Main Bearings4
Valve ConfigurationOHV
Fuel2bbl


Return to top





Tornado 230 I6
The "Tornado" 230 I6 uses a cast iron block and cylinder head with over head valves. The 230 was a bit ahead of its time because it used an overhead cam. The engine gets a bad reputation because of it's complexity compared to other engines at the time. The 230 is the only Kaiser engine to be used in a Jeep in all the years they owned Jeep.

The Tornado was used in Willys Pickups, Willys Wagons, J-series pickups, Wagoneers, M715s, and M725s.

The 230 was used in Jeep pickups (Gladiator) from 1963 until 1964. It was also used in Willys Pickups and Willys Wagons from '63 until '65.

Tornado 230 I6
Bore x Stroke3.34" x 4.38"
Displacement230 (3.76L)
Compression Ratio8.5:1
Horsepower (net)140@4000rpm
Torque (net)210@1750
Main Bearings4
Valve ConfigurationSOHC
Fuel1bbl or 2bbl

A low compression version of the 230 was available in Willys Pickups, Willys Wagons, and full size pickups in 1964. It was also available in Willys Pickups and Willys Wagons in 1965.

Tornado 230 I6
Bore x Stroke3.34" x 4.38"
Displacement230 (3.76L)
Compression Ratio7.5:1
Horsepower (net)133@4000rpm
Torque (net)199@2400
Main Bearings4
Valve ConfigurationSOHC
Fuel1bbl or 2bbl


Return to top





Perkins 192 4 Cylinder
The British made Perkins 192 diesel I4 was optional in the CJ-5 and CJ-6 from 1961 until 1965. It uses a cast iron block and cylinder head with mechanical lifters and 3 main bearings.

Perkins 192 4 Cylinder
Bore x Stroke3.50" x 5.00"
Displacement192.2 ci(3.15L)
Compression Ratio16.5:1
Horsepower (gross)62@3000rpm
Torque (gross)143@1350
Main Bearings3
Valve ConfigurationOHV
Fueldiesel


Return to top





Super Hurricane L-Head 226 I6
The "Super Hurricane" 226 L-Head engine has a cast iron block and cylinder head with 4 main bearings and solid lifters. The exhaust and intake valves are in the block, not in the cylinder head. The engine was used in earlier Willys cars, but was first introduced in 1950 in Willys trucks. The Willys Pickup and Willys Wagon used the 226 from '54 until '63. There was an option 7.3:1 high altitude version available during these years.

The 226 used between 1954-1958 has a slightly higher horse power rating than the later 226.

Super Hurricane L-Head 226 I6
Bore x Stroke3.94" x 4.375"
Displacement226.2 Cubic Inches
Compression Ratio6.861:1
Horsepower (gross)115@3800rpm
Torque (gross)190@1800
Main Bearings4
Valve ConfigurationL-head
Fuel1-bbl Carter

The 226 used from 1959-1962 has a slightly lower horsepower rating, but the torque peak comes at a lower RPM.

Super Hurricane L-Head 226 I6
Bore x Stroke3.94" x 4.375"
Displacement226.2 Cubic Inches
Compression Ratio6.861:1
Horsepower (gross)105@3600rpm
Torque (gross)190@1400
Main Bearings4
Valve ConfigurationL-head
Fuel1-bbl Carter


Return to top





Hurricane F-Head 134 I4
The F-Head 134 inline 4 was the standard engine in the CJ-5 and CJ-6 from their introduction until 1971. The F-Head was the only engine ever used in the CJ-3B. The engine also saw action in starting in the middle of 1950 in Willys Wagons and Willys Pickups. It was also used in FC trucks.

The F-Head 134 uses a cast iron block and head with mechanical lifters and 3 main bearings. Two versions of the F-Head were available most years, the output specifications are the same for both, the compression is different. The intake valves are in the head, but the exhaust valves are in the block. The valve configuration makes the F-Head engine taller than the L-Head because the L-Head has the intake and exhaust valves in the block.

New engine compartments had to be designed to make room for the taller engine. The CJ-5 and CJ-3B were designed with this engine in mind. It is fairly common to see a F-Head engine swapped into a CJ-2A or CJ-3A. Normally a section of the hood is cut out to make room for the carburetor.

There is a lot of confusion about the name of the F-Head engine. The F represents the valve configuration where one set of valves is in the head and one is in the block. The "F" in F-Head does not stand for "Flat" nor does it stand for "Ford". Other makes of vehicles used flat head engines and some people think the F-Head stands for flat head. Another source of confusion is Ford built some of their WWII GPWs with bolts with an "F" on the head so the parts could be distinguished from the Willys MB. They used F head bolts to build the GPW, but this is not related to the F-Head engine.

The main difference between different versions of the F-Head engine is the compression. The early F-Heads used between '50-'60 in Willys Wagons, Willys Pickups, CJ-5s, CJ-3B, etc had a low compression F-Head standard. The Willys Pickup only used this engine from '50-'56 and in '59.

Hurricane F-Head 134 I4
Bore x Stroke3.125" x 4.375"
Displacement134.2 (2.199L)
Compression Ratio6.9:1
Horsepower (gross)72@4000rpm
Torque (gross)114@2000
Main Bearings3
Valve ConfigurationF-head
Fuel1-bbl Carter

The "High Altitude" option was the same engine with a higher compression ratio.

Hurricane F-Head 134 I4
Bore x Stroke3.125" x 4.375"
Displacement134.2 (2.199L)
Compression Ratio7.4:1
Horsepower (gross)72@4000rpm
Torque (gross)114@2000
Main Bearings3
Valve ConfigurationF-head
Fuel1-bbl Carter

Between 1961 and 1970, the high compression version became standard and the low compression version was optional. A slight horse power gain was realized. The Willys Pickup used the 7.4:1 compression engine as standard and a 7.8:1 compression engine as optional from '60-'62.

Hurricane F-Head 134 I4
Bore x Stroke3.125" x 4.375"
Displacement134.2 (2.199L)
Compression Ratio7.4:1
Horsepower (gross)75@4000rpm
Torque (gross)114@2000
Main Bearings3
Valve ConfigurationF-head
Fuel1-bbl downdraft

The optional low compression F-Head used from '61 until '70.

Hurricane F-Head 134 I4
Bore x Stroke3.125" x 4.375"
Displacement134.2 (2.199L)
Compression Ratio6.9:1
Horsepower (gross)75@4000rpm
Torque (gross)114@2000
Main Bearings3
Valve ConfigurationF-head
Fuel1-bbl downdraft

In 1971, a low compression version was the only one available in the 49 state version. A California version was high compression.

Hurricane F-Head 134 I4
Bore x Stroke3.125" x 4.375"
Displacement134.2 (2.199L)
Compression Ratio6.7:1
Horsepower (gross)75@4000rpm
Torque (gross)114@2000
Main Bearings3
Valve ConfigurationF-head
Fuel1-bbl downdraft

The California high compression F-Head available in 1971.

Hurricane F-Head 134 I4
Bore x Stroke3.125" x 4.375"
Displacement134.2 (2.199L)
Compression Ratio7.4:1
Horsepower (gross)75@4000rpm
Torque (gross)114@2000
Main Bearings3
Valve ConfigurationF-head
Fuel1-bbl downdraft


Return to top





L-Head 134 4 Cylinder
The power and torque of the L-Head engine is arguably the main reason Willys won the contract with the DOD to produce the MB used in WWII. It doesn't seem like much by todays standards, but it out performed the engines used in the Ford and Bantam prototypes. The MB used a different carburetor from the civilian models and currently I do not have the percise specs on it, but it is right in this same range.

The L-Head is known as the L-Head becase the valves for the exhaust and intake are in the block. Most engines used in automobiles today have valves in the head. This design gave it the advantage of having a relatively low profile. Part of the DOD specifications required the vehicle to be able to drive under an object that was about 3 feet high.

The L-Head engines uses a cast iron block and cylinder head with 3 main bearings and mechanical lifters. The "Go Devil" engine earned its fame in the MB use in WWII. The L-Head continued to be used in the post War CJ-2A, Willys Wagon, Willys Pickup, CJ-3A, M38, and DJ-3A. The specifications are slightly different presumably due to carburetor and compression differences between the engines. The L-Head used in '45-'50 CJ-2As and '49-'50 CJ-3As is rated the same.

L-Head 134 4 Cylinder
Bore x Stroke3.125" x 4.375"
Displacement134.2 ci(2.2L)
Compression Ratio6.48:1
Horsepower (gross)60@4000rpm
Torque (gross)105@2000
Main Bearings3
Valve ConfigurationL-head
FuelCarter WO-596S 1bbl downdraft

The L-Head used in 1947 until mid 1950 Willys Pickups and Willys Wagons has a slightly higher torque rating. It uses a different carburetor and has different compression.

L-Head 134 4 Cylinder
Bore x Stroke3.125" x 4.375"
Displacement134.2 ci(2.2L)
Compression Ratio6.47:1
Horsepower (gross)60@4000rpm
Torque (gross)106@2000
Main Bearings3
Valve ConfigurationL-head
FuelCarter 626 1bbl

A high altitude version of the L-Head was optional with the Willys Pickup and Willys Wagon.

L-Head 134 4 Cylinder
Bore x Stroke3.125" x 4.375"
Displacement134.2 ci(2.2L)
Compression Ratio7.0:1
Horsepower (gross)60@4000rpm
Torque (gross)106@2000
Main Bearings3
Valve ConfigurationL-head
FuelCarter 626 1bbl


Return to top









Posted by:
Opie Bennett
E-mail opiebennett@gmail.com
XJ_Ranger on NAXJA and Pirate Bulletin Board and Early CJ-5

Vote for me!
Home