Chevrolet engine block casting numbers

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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?

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?

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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.

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. Stamped Numbers are a set of numbers literally stamped into the block. These numbers will tell you where the engine was assembled, production date, and the suffix code.

Chevrolet engine block casting numbers

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.

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We are always looking for new Chevy engine castings numbers. That eliminates the and possibilities. Small Block Chevy Stamping Numbers. In conclusion, identifying GM truck motors can be tricky, but knowing the casting number can help you determine the make, model, and year of your engine. Bowtie, Aluminum, billet main caps, 3. This list of codes is a summarization, it is not complete nor all inclusive. III, aluminum, Vortec 5. Chevrolet issued technical service bulletins to indicate which engines were to recieve a vin stamp, so who knows what could have happend or not happened. The "7" is the year of the decade. There are two sets of numbers that will help determine this. Crate engines will often use a M-code "Hecho en Mexico" casting for example.

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?

As new castings are released on late models keep your eyes open for the new numbers. Free Catalog. Here's your chance, click below to see what positions are opening soon! Or has the transmission been changed? General Decoding Information This topic can be somewhat confusing, especially with the amount of information available and the interpretation of it. LS1 "GTZ", aluminum, 38cc, 2. General Engine Block Specifications 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. II, L99, 4. Later blocks may also have the size of the engine displacement in liters listed at 3. As an addition, here are some of the most common casting numbers associated with the GM engine types mentioned previously:. Some of the later model blocks have the casting number on the passenger side of this ledge. Bowtie, Aluminum, billet main caps, 3. Bowtie, 3. If you want more specific information, you have to look at the Stamped Numbers.