Willys Jeep Identification By Serial Number
Identifying early Willys Jeeps is often a challenge because they did not have Vehicle Identification Numbers. VINs first began to appear on vehicles produced by U. S. manufacturers in 1954, according to the National Highway Traffic Safety Administration. Willys-Overland sold Jeep to the Kaiser Corporation in 1953, just before the VIN system was put into use. Willys Jeeps have serial numbers rather than VINs.
- Willys Jeep Identification By Serial Number Lookup
- Willys Jeep Identification By Serial Number Code
- Willys Pickup Serial Number Identification
Serial Numbers and Other Clues
Tubs were returned to Willys for final assembly, many weeks or months might have passed. In these cases, the ACM to Serial number differential can be significantly greater than 10000. Serial numbers:. the firewall Serial (patent) number tag is the ONLY one which remained consistent throughout production. all other tags/stampings either. Thank you for posting this! This is very detailed and helpful information that makes life a lot easier for some of us out here. VEHICLE IDENTIFICATION This document is intended to help identify Willys, Kaiser, and AMC Jeep CJ5 vehicles. Information contained herein was compiled from the Jeep parts manual, Jeep service manual, and various locations on the web and is NOT GUARANTEED TO BE ACCURATE. Jeep CJs built prior to 1962 typically used a serial number. 1962 and later Jeep CJs used VIN numbers. Refer to the below CJ Jeep Serial number decoder and VIN charts to learn more about your Jeep. The CJ serial number chart ranges from 1955 – 1961 for the CJ-5, and 1956-1961 for the CJ-6.
- The number prefix will tell you the manufacturer. Willys engines have numbers that start with the letters 'MB' (MB123456) whereas Ford engine numbers usually start with 'GPW' (GPW123456) If your serial number is not located as shown on the serial number page, then you probably have a post-war replacement or civilian engine block in your jeep.
- Willys Jeep Production Figures & Serial Numbers Thanks to Derek Redmond, creator of The CJ3B Page for letting me duplicate this list, thanks to Charlie Weaver for transcribing it, and thanks to Norton Young, the Willys employee who kept them.
Step 1
Look on the glove compartment door or the dashboard in front of the passenger seat for three metal plates. The center plate should have the serial number, the name Willys, the model and date of delivery on it. If the Jeep is a model MB or GPW, it is a military Jeep. If it is a model CJ, it is a civilian Jeep.
Step 2
Look for your Jeep's serial number on the water pump at the front of the engine, or on the left front chassis.
Step 3
Examine the engine. Look for a serial number stamped into a rounded area on the passenger side of the engine block just below the cylinder head and behind the oil filter canister. If necessary, wipe the engine block off. The serial number can be covered with grease or dirt. On World War II military Jeeps, the flat spot where the serial number appears is about half an inch to two inches across. On a civilian Jeep, it is about half an inch to four inches across.
Step 4
Examine the windshield frame to see if it has 'Jeep' stamped on it. If it does, your Jeep is probably a 1946-1949 CJ-2A. If it does not, your Jeep is most likely a 1941-1945 MB or GPW.
Step 5
Look at the way your Jeep's spark plugs are mounted. If they are on the top of the head, take a look at the windshield. If it is a single-piece windshield, check to see where the spare tire is mounted. If the spare is on the rear passenger side quarter panel, your Jeep is probably a 1949-1953 CJ-3A. If it is on the back tailgate panel, your Jeep is most likely a 1950-1952 M38. If your Jeep's spark plugs are mounted on the block at a 45-degree angle, it was made between 1953 and 1971.
Look for a Willys Jeep model that is like yours in reference books or on Jeep websites.
Items you will need
- Flashlight
- Rags
- Jeep reference books
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Willys Jeep Identification By Serial Number Lookup
How to Identify your Willys Jeep if you don’t have a VIN number, but want to know your approximate year and model:
1. Are your spark plugs on the top of the head or on the side at a 45 degree angle?
A1: If they are on the top of the head, go to #2
A2: If they are on the side of the head, go to #9
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2. Do you have a single piece of split windshield?
A1: If you have a single piece windshield, go to #3
A2: If you have a split windshield, got to #6
3. Is your spare tire mounted on the rear passenger side quarter panel or on the back tailgate panel?
A1: If it is on the passenger side, go to #4
A2: If it is on the back tailgate panel, go to #5
4. You have a 1949-1953 CJ-3A.
5. You have a 1950-1952 M38.
6. Does your windshield frame have “Willys” stamped on the front of it?
A1: If it does not have the “Willys” stamp, go to #7
A2: If it is stamped “Willys” go to #8
7. You have a 1941-1945 MB or GPW.
8. You have a 1946-1949 CJ-2A.
9. Do the front of your front fenders curve down 6-8 inches or do they stop flat with only a 1″ front lip?
A1: If they curve down, go to #10
A2: If they stop flat, go to #11
Willys Jeep Identification By Serial Number Code
10. You have a 1955-1971 CJ-5.
11. You have a 1953-1964 CJ-3B.
Click on the link below for detailed specs and vehicle illustrations.
Willys Pickup Serial Number Identification
Willys Vehicle – Quick Reference Guide
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