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 Chevys manufacture.The suffix provides the size, model year, and the horsepower of the Chevy engine.Step 1 Locate the Chevy identification number on the engine block.
Depending on the size of the engine, the location of the identification number will vary. The identification numbers on a Chevy engine with a small block V-8 are adjacent to the cylinder heads on the passengers side, close to the front of the engine block. Look closely because the alternator blocks the identification number. The identification numbers on a Chevy big block V-8 engine are on the covering of the timing chain. Step 2 Decipher the Chevy engine identification number prefix. The identification number contains a combination of numbers and letters and is seven or eight characters. The prefix explains the location as well as the date of the Chevy engines manufacture. For example, a Chevy engine with the identification number S1029CTY was manufactured in Saginaw (S) on September (10) the 29th (29). The two-to-three character suffix tells the owner the displacement of the engine, the horsepower of the engine, and the year and model of the vehicle. Taking the example from above, CTY is the identification number suffix. CTY stands for a 1970 Camaro with a 396 c.i.d and 375 horsepower. Remember to always reference the online identification guide to ensure an exact match. References Year One Tech: Chevy Block number identification About the Author This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. To submit your questions or ideas, or to simply learn more about It Still Works, contact us. How to Identify a Chevy 400 Small Block How to Find the Year Make of a Chevy. Small Block Chevy 327 Identification How to Adjust the Height on the. Leaf Group Media About Us Accessibility Terms of Use Privacy Policy Copyright Policy Manage Preferences.
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