Engine serials numbers for the CJ-2A started out being stamped on the side on the block like the MB. These blocks (other than having 'CJ2A-' instead of 'MB-') are identical to the MB blocks. At some point very early in '46, the serial numbers moved to the top of the engine block. The area on the top of the block between the cylinder head. Serial # Front Axle Date Rear Axle Date Carburetor Model Carburetor Stamp Carburetor Tag Fuel Pump Stamp Fuel Pump Date Fuel Pump Bowl Distributor Model Generator Model Voltage Regulator Starter Model Optional Equipment Remarks Web Site Email Forum ID; Detail links: 1945: 10011: E 1972: Carter W-0: 458: Missing. Metal: View Options: 1945. Most old L-134's got that boost after about 5 or 10 years when you had to plane the head to cure the warp after a blown head gasket. If the engine was rebuilt, it was not unusual for the engine serial number on the water pump boss to get removed when the top of the block got cleaned up as well. Engine Serial Number: Engine serial number is stamped on the top water pump boss at upper front end of cylinder block, or on a boss on the right side of cylinder block above generator. Numbers start at 10,001. Engines equipped with. 010 undersize main and connecting rod bearings can be identified by the letter 'A' following the serial number. Use for: 1946 to 1971 L-4 134 Go Devil 463 F-4 134 Hurricane 473/475 Same as part # 948137: Connecting Rod Bearing Set - L-4 134 463 / F-4 134 473/475.

At first glance, the Willys MBandFord GPW look identical in appearance, but with closer observation,hundredsof differences can be found. This page will point out the majorandmost obvious differences only. The purpose of page is to aid youin determining which model W.W.II jeep you have.
It is important to know that thepartsused on Willys MB and Ford GPW jeeps are completely interchangeablemechanically. When your jeep left the factory it was either 100% Willys or 100% Ford,but from that moment on, motor pool mechanics, government rebuilddepotsand civilian owners have been swapping parts without regard to whetherthe part is a Willys or a Ford part. This means that thejeepyou have is likely a combination of the two types. Often jeepownerswill refer to their vehicle as a 'GPW with an MB motor' for example.
What this means is that in order toaccurately identify your vehicle, you need to look at many clues. Generally the vehicle is divided into three major components: thechassis,the engine and the body (also referred to as the 'tub' on jeeps).Ideally,you will find that your jeep will have matching engine, frameand tub. This is often not the case. The sections that followwillhelp you determine the manufacturer of your engine, frame, and tub.

Willys L134 Engine Serial Numbers For Sale

Engine Block
This one is easy. Examine theserial number stamped on the engine (see serialnumber page for location). The number prefix will tell youthemanufacturer. Willys engines have numbers that start with theletters'MB' (MB123456) whereas Ford engine numbers usually start with'GPW'(GPW123456)
If your serial number is not locatedas shown on the serialnumber page, then you probably have a post-war replacement orcivilian engine block in your jeep.

Willys L134 Engine Serial Numbers Identification

/onedrive-for-el-capitan.html. Frame
The easiest way to distinguishbetween the two frame types is to inspect the front frame crossmemberthatis beneath the radiator. The FordGPW frame uses an inverted 'U' shaped steel member here. It is openon the bottom. The WillysMB frame has a steel tube or pipe type member in this location.
Another detail to check is themachine gun mount. In the center of either frame, mounted to acrossmemberbehind the transmission, is a large, roughly circular plate withfour holes drilled in it . This is the machine gun pedestalmount. Only W.W.II jeeps have this feature, and all W.W.II MB/GPW jeeps wereequippedwith this plate. The plate differs in design between Fordand Willys and can be used to identify the frame if the frontcrossmemberis missing.

Willys L134 Engine Serial Numbers Lookup

Body or 'Tub'
This is a more complex determinationowing to the variations in bodies used throughout the war. Before late 1943 Willys and Ford used separately manufactured bodies. Startingin early 1944 one manufacturer (American Central Manufacturing Co.)beganbuilding bodies for both Ford and Willys. These bodies arereferredto as 'composite' bodies because they have characteristics of theearlierFord and Willys bodies combined into one body type. It is recommendedthatyou consult a reference book (see the Howto Get Started page) to pinpoint exactly which body type youhave.
It is possible to identify certainbody characteristics that are associated with either Willys or Fordhowever. Starting at the rear of the vehicle: The early jeeps had themanufacturersname stamped into the left side of the rear panel, eithera script 'Ford' or a blockletter 'Willys'. This practice was discontinued early in the war(bymid 1942).
Moving forward to the rearwheelwell toolboxes:Ford bodies have a rectangular depression where the toolboxlockbutton is installed, Willyshave a circular depression here. (note: composite bodies have acirculardepression also) Another toolbox difference was in the toolboxlidsor covers. The Willys MBuses a plain flat cover whereas the Fordhas an embossed lid.
One more significant detail are thetoeboard gussets. These can be viewed under the hood. Theyare the roughly triangular braces that extend from the firewall down tothe frame. Fordstyle gussets have rounded corners and have 3 large holes in each.(note: these style gussets are also used on composite bodies) Willystoeboard gussets are very angular and flat-sided with five holes ineach.
If your body has round toolbox lockbutton depressions (like a Willys) AND it has rounded, three-holedtoeboardgussets (like a Ford) then your body is probably a composite type asdescribedabove. A composite body installed by Ford on a GPW would haveFordtype bolt-on items attached to it (embossed tool box lids, for example)whereas a composite body installed by Willys on an MB would have Willystype bolt-on items attached to it (plain toolbox lid, for example).

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