Small block chevy engine code stamping numbers

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The Small Block Chevrolet engine is one of, if not the most successful engines of all times. Over the course of 50 years there were many different versions made. Some had better heads, more compression, or even more cubic inches. There are two sets of numbers that will help determine this. The first is a set of Casting Numbers, the second is a set of Stamped Numbers.

Small block chevy engine code stamping numbers

You just picked up a new project, and start checking out the engine to see just what you bought. Is it the original for the vehicle? Or has the transmission been changed? Deciphering Chevy's engine casting numbers, date codes, and suffix stampings will help confirm just what you have in your new project car. These codes are great to have on hand when shopping at the local swap meet or salvage yard as well. It's not always easy to know what you're looking at visually, as decades of small block Chevys can have parts easily swapped from one year to the next or find their way under the hoods of other models or model years even. Want to know exactly what you have? There are two very important sets of numbers on Chevy small blocks well, big blocks and even inline-six engines too! These two numbers are the casting number and engine ID code. As the name infers, the casting number is cast into the block when the block itself is cast. This casting number will denote engine displacement, 2 or 4 bolt main caps, application year or year range, and often any specific application notes. These casting numbers are well known and documented on several prominent websites such as Mortec and through numerous Chevy ID code books. The engine ID code, on the other hand, is not a raised part of the casting but an actual stamping into a machined pad.

The point of this page is to help you figure out how to decode stuff.

Date codes consists of a letter, 1 or 2 digits for the day, and 1 digit for the year such as J 25 7 would be October 25, The block casting number on small block and big block Chevy V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. The next two digits stand for the month of the year. In this example " 06 " or the sixth month, June. The " 01 " stands for the 1st day of the month.

General Decoding Information This topic can be somewhat confusing, especially with the amount of information available and the interpretation of it. You can decode the casting number. And you can check dates. The engine code and partial vin will accurately nail down whatever the thing is rather quickly, and the other information will fall into line with that. This page has basic information on it, but it's a portion of the Small Block Chevy numbers information. The Engine Code page is where this topic is further detailed. If it does - it's "numbers matching", otherwise - it's not.

Small block chevy engine code stamping numbers

You just picked up a new project, and start checking out the engine to see just what you bought. Is it the original for the vehicle? Or has the transmission been changed? Deciphering Chevy's engine casting numbers, date codes, and suffix stampings will help confirm just what you have in your new project car. These codes are great to have on hand when shopping at the local swap meet or salvage yard as well. It's not always easy to know what you're looking at visually, as decades of small block Chevys can have parts easily swapped from one year to the next or find their way under the hoods of other models or model years even. Want to know exactly what you have?

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CE stamping from and date stamped T While 6 different bore size blocks have been produced, the small block engine can be classified into 3 bore sizes and 3 main bearing sizes. It is a direct replacement for the original equipment. The engine ID code stamping is located on a flat pad in front of the passenger side cylinder head big blocks can be in the same location or above the timing chain cover, with inline-sixes stamped on the passenger side of the block behind the distributor. Sometimes the engine ID code is obscured by the alternator. Date codes consists of a letter, 1 or 2 digits for the day, and 1 digit for the year such as J 25 7 would be October 25, Small Block Chevy Toating Assembly, dish. In this example, 6A decodes to Atlanta final assembly, and the last six digits of the VIN. Insert Quotes Quotes Post Reply. You will NOT find a 4 bolt block made by the factory. If the installing GM dealer followed procedure a vin will be stamped on the rough casting near the oil filter.

Small-block Chevy engines are a staple in the automotive industry, known for their durability, reliability, and versatility. Engine code stamping numbers are a series of alphanumeric characters that are stamped on the engine block of a Small Block Chevy engine. They are used by mechanics, car enthusiasts, and collectors to identify and verify the authenticity of an engine.

The block casting number on small block and big block Chevy V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. February 7, Ask one of our knowledgeable Reps! Explore Our Forums. The CE block stamp year is the year the block was stamped and not for what year of car the block was destined for since a generic block for fitted engine could be used as a warranty replacement for any number of years' engines, applications, and for cars produced from any assembly plant. I would also be interested if anyone has information about the year code being for the model year or year of replacement? The first letter of the stamp tells us where the engine was assembled. Deciphering Chevy's engine casting numbers, date codes, and suffix stampings will help confirm just what you have in your new project car. Anyways, that's what that circle thing is if you happen to see it on something. On the left rear top of the bellhousing flange there is a date code cast into the block Even though some plants elected to stamp partial VINs on other locations beside the engine pad such as the rough cast area by the oil filter boss or on the bellhousing flange , most plants for most years did stamp the partial VIN on the engine pad next to the Flint or Tonawanda engine assembly date and ID letters.