Chevrolet engine block casting numbers

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 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.

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. 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. These numbers are often machined off when they deck a block. The engine assembly date must precede the car build date often by a few days , otherwise something is amiss.

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Many folks want to know where to look for these Chevy engine casting numbers and codes on blocks and cylinder heads so we decided to put these pages with photos together to help you find them. Most are easy to find once you know where to look. There may be a great deal of grease and crud covering them that will have to be cleaned before you can read them. Also trying to read them while the motor is in a vehicle can also be harder, especially the block casting numbers and casting dates at the rear of the block. Hang in there, if you try, you can use a mirror and a little patience for the hard to see and reach areas. 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.

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.

Chevrolet engine block casting numbers

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. The GM engine serial number is the production code of the engine.

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Six Cylinder : Passenger side of the block behind the distributor. II, "LT1", aluminum Remember that you have to look at ALL of the numbers, features and parts characteristics to figure out what it is you are looking at. 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. Different ways to lift an engine, including the most common way and the parts needed to do so. Again, it either matches or it doesn't. Aluminum, Pontiac Super Duty version of Gen. They might look like this "" or "" or "". The engine assembly date must precede the car build date often by a few days , otherwise something is amiss. Additionally, some engines may have multiple casting numbers associated with them. A upper case letter "I" can look like the numeral "1" and visa versa.

We are always looking for new castings numbers.

Don't forget to follow us on Facebook, and if you run a website or write for a blog, please link to our site! The engine assembly date must precede the car build date often by a few days , otherwise something is amiss. A number of the casting dates refer only to the year of the decade so you will have to see which other features the part has to determine which decade it was made in. February 12, A "two-bolt" main, or a four-bolt main. This is the GM body designation. It was used in the Chevrolet Camaro and the Pontiac Firebird. Big Block Chevy : Machined pad in front of the passenger side cylinder head or above timing chain cover. Aluminum, 58cc, angle plug Was also used for some "CE" replacement blocks Crate motor for years indicated.