Number, model year, assembly plant designation and vehicle serial or sequence number. The format consists of divisional identification The vin code format is stamped onto most engines. Machining operations (decking) will obliterate the engine ID.Įngine ID Code Example: V0101CLJ - (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code)Īnother example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400) The engine date must precede the car build date, otherwise something is amiss. 6 cylinder engines are stamped on the passenger side of the block behind theĬlick here for Chevy Engine Code Listings V8 codes are stamped on a pad just forward of the right side (passenger)Ĭylinder head. The point of this article is to help you figure out how to decode stuff.Īll engines are stamped with an engine ID code, consisting of assembly plant code, productionĭate and suffix code. Lastly, in extreme cases, you'll want to verify the numbers stamped onto the component were the ones stamped into it originally and aren't restamped. You need to decode the engineĪnd see if it matches the vehicle, and if the code signifies Z28 or SS equipment. Numbers matching is important when you're trying to decode a Z28 or Super Sport where the VIN won't identify the vehicle as such. But numbers correct is not numbers matching. Some folks use these terms loosely, or will say 'numbers correct' or something to that effect. The partial VIN will match the vehicles VIN. This match is done via the PARTIAL VIN stamp on the component. When people say 'It's numbers matching' - what they mean is the engine (or other component, i.e the transmission) can be MATCHED to the vehicle it was This is my opinion, and the generally accepted norm: The Engine Code page is where this topic is further detailed. This page has basic information on it, but it's a portion of the Small Block Chevy numbers information.

QUICKLY IDENTIFY A CHEVY ENGINE CLICK HERE - for decoding engine codes. The engine code and partial vin # will accurately nail down whatever the thing is rather quickly, and the other information will fall into line with that. The primary pieces of information you'll decode are the Engine Code and Partial VIN. This topic can be somewhat confusing, especially with the amount of information available and the interpretation of it. Small Block Chevy Engine Block Identification

Gm head casting date code