How do I tell what year my GM engine is

How do you decode GM engine numbers?

Read the next four digits in the code, which will be all numbers. This refers to the date that the engine was cast. The first two numbers are the month, and the last two are the day. For example, if the numbers read 0107, then the engine was cast on January 7.

How do I identify my GM engine?

How to Identify a GM Block

  1. Locate the engine ID number. On small-block V8s, it is located on the passenger-side front of the engine block, right below the cylinder head. …
  2. Decode the ID number prefix. The prefix is five-digits long and begins with a letter.

How do you read engine serial numbers?

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.

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Where is the date code on a small block Chevy?

Small block casting date is located on driver side rear of block on flange forward of bellhousing.

How do I identify my GM heads?

Chevy heads have often been identified by sight and most commonly by the different casting shapes on the ends of the cylinder heads. While these casting marks cannot tell specifics about the cylinder heads, they can help identify a performance head from a non-performance head.

How do I identify my GM LS engine?

How Do I Know Which LS Engine I Have?

  1. The 8th digit of the VIN.
  2. By visual inspection. The easiest way to tell the difference is to check the 8th digit of the Vehicle Identification Number (VIN) on the original vehicle. (See below.)

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Why is a 327 better than a 350?

In the vehicle, it’s more of a matter of “gearing” than revs. A 327 with it’s shorter stroke would need shorter gears so it can GET to its revs, where a 350, with its slightly longer stroke and more torque output will pull a little taller gear than the 327 will. … Never underestimate the importance of gearing.

Where can I find engine number?

Where Can I Find the Engine Number of My Car? Car Engine Number is found printed on the vehicle’s engine casing. Similar to the chassis number of the car, the engine number is used for identification purposes.

How long is an engine serial number?

The serial number can help determine the engine model and also help determine the correct service parts and changes based on serial number breaks. Engine Serial Number Rule (7 digits) Starting June 1, 2012 the engine serial number will have 7 digits (currently 6 digits) and will be completely unique.

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Does VIN number tell you production date?

The vehicle identification number, or VIN, is a 17-digit combination of numbers and letters unique to every vehicle. … The VIN also identifies the year that the vehicle was manufactured. All you need to know is which number or letter represents the production date.

What does the 8th digit in a VIN number mean?

You can determine the RPO code if you have the Vehicle Identification Number (VIN) from the original vehicle. It’s the engine size! The eighth VIN digit (1) will describe engine information a little more in depth, like … It’s the third and final character that helps to identify the manufacturer and location of build.

How do you tell a 327 from a 350?

The compression height of the piston (1.67 for a 327; 1.56 for A 350), or the casting number on the crankshaft should tell you what it actually is.

How do you find out what year a motor is?

8 Answers. The engine will have a alphanumeric casting number on the passenger side (right side) of the block, under the heads. The first letter of the code identifies the decade (C=1960s, D=1970s, E=1980s), the second digit in the code identifies the specific year. A 1973 motor for instance would be D3, as an example.

What year is the best Chevy 350 engine?

The LT-1 was the last and arguably greatest of the old fuel-guzzling, emissions-spewing 350 engines. Those original LT-1s from 1970 will go down as some of the best engines of their time.

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