Categories FAQ

Often asked: Chevrolet motor identification numbers?

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 tell what year my Chevy engine is?

How Can You Tell What Year a Chevy Engine Is?

  1. Open the hood of your Chevy and locate the engine block.
  2. Look at both the front face and rear face of the engine block for the block date code.
  3. Decide which type of date code your block uses, either an alphanumeric or simple numeric code.
  4. Read the second and third digits of the block date code.

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.
  3. Cross-reference the engine ID number with a Chevrolet engine ID listing.
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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.

What color did Chevy paint engines?

Engine Colors

YEAR ENGINE COLOR
1957 Truck 283 Gray-Yellow-Green-Black-Orange
1957 Truck 322 Red
1958 Passenger 235 Blue*
1958 Passenger 283 Orange*

How do you read engine 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. Just tell the store clerk those two characters and you’re in business.

How do I identify a Chevy 350 engine?

How to Identify a Chevy 350 Motor

  1. Look at the rear of the engine block for casting numbers, by where the transmission mounts to the engine.
  2. Write down that number, and go to MorTec.com.
  3. Look for a second casting number on the rear of the block.
  4. Look at the front of the block, just forward of the valve covers.

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 you find out what year a motor is?

However, the most accurate way is to look at the serial number on the block, which is located on the drivers side, rear, on the extended part of the deck surface that goes over the bell housing area. The date code for the engine is built into the serial number after the first two numbers.

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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.

What year is my small block Chevy?

Small block casting date is located on driver side rear of block on flange forward of bellhousing. Big block on the right side of engine above the oil pan rails. Casting Date Example: E038 – (E = Month, 03 = Day, 8 = Last digit of model year (1978)).

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.

How do I identify a GM 6 cylinder engine?

Chevrolet’s six-cylinder engines are easily identified due to Chevy’s efficient engine numbering system. The code is seven to eight digits long, consisting of numbers and letters. The suffix gives the year vehicle, horsepower and transmission pairing, while the prefix gives the date and location of manufacture.

How do I know what engine I have?

Your VIN number is your vehicle identification number and you can find your engine size by VIN number. In the series of numbers and letters, the tenth from the left denotes the model year and the eighth is the engine codes. Just tell the store clerk those two characters and you’re in business.

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