Where to find casting number on chevy 350

Press ESC to cancel. Ben Davis February 23, Where are casting numbers on SBC? How do I identify small block Chevy casting numbers? How do you read GM engine casting numbers? How do you read a casting number? It's all in the engine code sometimes referred to as engine number or vehicle identification number VIN. You can find the VIN in the lower corner of your windshield on the driver's side. In the series of numbers and letters, the tenth from the left denotes the model year and the eighth is the engine code.

The difference in the displacement comes from the crankshaft stroke. The uses a 3. Depending on the year of the block, the biggest difference in the block itself is the main journal size. The engine serial number is usually found on the front or rear of the engine block to the sides of the engine. There is a "wing" looking thingy above the front cover that sticks out of the block. On a you can't lay your finger in the indentation, on a you can. Hard to explain but easy to see if you know the difference.

Easy tell back in the day. Vehicle Description Section The fourth through eighth digits describe your vehicle's model, body type, restraint system, transmission type, and engine code. Check the bore on the engine if the heads are off. The Chevy cubic inch engine has a 4-inch bore whereas a cubic inch engine has a 4. The has a 3. The rods are 5. Small Block Chevy Identification Location. The Chevy engine is stamped on a machined pad on the front passenger side cylinder head usually behind the alternator.

The Code. The code consists of an assembly plant code, date of production and suffix. Look at the front of the block, just forward of the valve covers. There is a metal pad on the passenger side of the block that has a series of numbers etched in it. If necessary, clean up the pad with degreaser and a wire brush.

Write down the code on the paper, and look it up on the MorTec website. MorTec also has reference codes for the front block numbers, which indicate at which plant the block was manufactured, and inwhat kind of car it was previously installed.

Russell Wood is a writer and photographer who attended Arizona State University. Early blocks will have just the ID code, whereas later engines usually from on will also have a partial VIN stamped with the ID code as shown in our example here from a Corvette with small block with TH trans.

On a small block Chevrolet, the casting number is found at the rear of the block on the driver's side as is with Chevy's big block engines.

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. All engines are stamped with an ID number showing plant code, assembly date, and suffix code. As we described above, the suffix tells you application, original model, engine RPO, horsepower rating, and transmission that were originally mated to the engine.

Below we'll break down the ID codes prefix and suffix sections. Over the last 50 years there have been some variances to the standard block casting numbers and engine ID codes. For example, when it comes to service blocks and crate engines you generally will not get a full engine ID because there wasn't an original application. You will usually find a "CE" for Chevy Engine. Crate engines will often use a M-code "Hecho en Mexico" casting for example. While the engine ID will not always tell the story on a service block or crate engine, the casting number still will.

For our example shown here this casting number denotes a cubic inch Goodwrench crate engine with a 2-piece rear main seal. Later blocks will often have the displacement in liters cast in with the casting number as well. It is common on these later blocks to see "5. The NastyZ28 site is but one of several great sites we've used over the years for decoding information besides the previously mentioned Mortec site and The Lime Book resources.

The first letter of the stamp tells us where the engine was assembled. The numbers that follow are the actual assembly date.