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How do you read GM date codes?

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How do you read GM date codes?

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 you tell what year your engine is?

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.

How do you tell if I have a 350 or 305?

Matching the suffix portion of the engine ID number properly identifies the engine as a 305 or 350 cubic-inch. If a bore measurement is to be taken, Popular Hot Rodding identifies the 305s small bore at 3.736 inches. Both the 305 and 350 have the same 3.48-inch stroke.

How do I know what Chevy engine I have?

You can identify a Chevy by the numbers on its engine block, recorded in an official Chevy engine block registry. The identification number consists of a seven-to-eight digit code. The prefix consists of five digits and explains the date and the location of the Chevy’s manufacture.

How do you read engine serial numbers?

Engine Serial Number composition

  1. the list number or build list, typically 2 to 4 letters followed by 4 or 5 numbers.
  2. a letter identifying the country.
  3. a series of numbers showing the build line, also called a serial number.
  4. a letter indicating the year of manufacture.

Where is the serial number on a 350 engine?

Your serial number is located on your engine plate, often located on the left-hand side of the engine.

How do I identify a Chevy engine?

How do you decode a GM VIN number?

GM’s format is as follows:

  1. 4th digit: Model platform code.
  2. 5th digit: Model series code.
  3. 6th digit: Body style.
  4. 7th digit: Restraint type (seatbelts and airbags)
  5. 8th digit: Engine type.
  6. 9th digit: Check digit.
  7. 10th digit: Model year.
  8. 11th digit: Factory ID.

What year is a 350 Chevy engine with casting no 3970010?

What year is a 350 Chevy engine with casting no 3970010? In 1968 they made 327’s with this casting number but they were only 2 bolt main. Then from 1969 – 1979 they made 350’s with this number and they were either 2 or 4 bolt main.

Where is the suffix code on a 350 Chevy?

If it’s a 4 bolt main, then you know it’s a 350. To determine exactly what you have, you need the block “suffix code”. It’s on the front of the engine, just in front of the passenger side head.

What kind of engine does a 1975 Chevy Camaro have?

The suffix, CML, tells you that the engine was for a 1975 Camaro with a cubic inch displacement of 350, high performance 155 with four barrels. Use the site link in the reference section to decipher your Chevy engine code. More often than not, the ID code on your Chevy will be covered in grease.