Chevrolet engine block casting numbers

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.

This site has limited support for your browser. We recommend switching to Edge, Chrome, Safari, or Firefox. General Motors GM truck motors are known for their durability, reliability, and performance. Whether you're looking to purchase a new or used GM truck engine for your race car build, it's important to know how to identify the motor to ensure you're getting the right one for your needs. One way to identify GM truck motors is by their casting numbers. The casting number is a series of alphanumeric characters that are usually located on the engine block or cylinder head. It's a unique identifier that tells you the engine's make, model, and year.

Chevrolet engine block casting numbers

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. Some folks use these terms loosely, or will say "numbers correct" or something to that effect. But numbers correct is not numbers matching. Again, it either matches or it doesn't. If it doesn't match - is it correct? Numbers matching is important when you're trying to decode a Z28 or Super Sport where the VIN won't identify the vehicle as such.

The engine assembly date must precede the car build date often by a few daysotherwise something is amiss. All these are identified here.

We are always looking for new castings numbers. If you have some information you want to share with us and our visitors, stop by the Forum and leave us a post! Right now we are limiting the listings to Chevy V-8 blocks, cranks and heads. As new castings are released on late models keep your eyes open for the new numbers. We appreciate the support and encouragement we have received from our visitors around the world for the past 20 years. Don't forget to follow us on Facebook, and if you run a website or write for a blog, please link to our site! NOTES

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.

Chevrolet engine block casting numbers

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. As the names imply, Casting Numbers are cast into the block when it was made. These will tell you general information about the engine. If you want more specific information, you have to look at the Stamped Numbers.

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Small Block Chevy Stamping Numbers. More Info. Let's decode something real quick like, you can read the details further down below: Here's an engine. In CLJ is a L69 in a monte carlo, or in it's a from a monte carlo. The only guarantee is to take off the pan and look. Aluminum, Pontiac Super Duty version of Gen. February 7, February 12, Z Camaro The casting dates look something like this "E 12 7". As new castings are released on late models keep your eyes open for the new numbers. Here's your chance, click below to see what positions are opening soon! The Keys To Details Details matter — plain and simple.

Knowing how to do a GM engine serial number lookup can be beneficial for you. Of course, GM has made hundreds of engines over the years, such as the Chevy engine , or the small block , among many others.

NOTE: This casting has been used in many different versions of this aluminum 18' and 15' Bowtie race head. Trucks and industrial General Decoding Information This topic can be somewhat confusing, especially with the amount of information available and the interpretation of it. Engine Code Stamping Numbers All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. I know Norwood built Camaros - among other things. Some folks also use a piece of aluminum foil to make a rubbing of the numbers and dates on the rear ledge of the block. But numbers correct is not numbers matching. Small Block Chevy Casting Numbers. Bowtie, aluminum, 45cc chambers, 1st version, symmetrical ports, cc intake ports, splayed valves Some folks use these terms loosely, or will say "numbers correct" or something to that effect. My point here I guess is Small Block Chevy Identification Guide. Learn about performing an LS Swap in a Chevelle in this tech article. The engine assembly date must precede the car build date often by a few days , otherwise something is amiss.