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1. #Chevy forum vehicle identification number decoding serial number
2. #Chevy forum vehicle identification number decoding manual
3. #Chevy forum vehicle identification number decoding code

Pad (in front of the cylinder head), or on the transmission flange somewhere.

#Chevy forum vehicle identification number decoding serial number

Starting in 1970, the serial number is stamped either above the oil filter, somewhere on the block In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped Number, model year, assembly plant designation and vehicle serial or sequence number. The format consists of divisional identification

#Chevy forum vehicle identification number decoding code

The vin code format is stamped onto most engines. Some engine 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 assembly date must precede the car build date (often by a few days), otherwise something is amiss. The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc. The prefix portion of the ID code tells you the engine assembly plant code, and the engine's assemblyĭate (for example, 0701 = July 1st.no year is indicated). Six Cylinder: Passenger side of the block behind the distributor. Often hidden by the alterator.īig Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover. Small Block Chevy: Machined pad in front of the passenger side cylinder head. The location of this code depends on the type of engine, typically as follows: Everything else lines upĪll engines are stamped with an engine ID code, consisting of assembly plant code, production 1973 - eliminates every other possiblity. This is why I looked at the VIN code 1st. That eliminates the 400 and 305 possibilities.Īs you can see - codes are reused and/or they span years. So when the arguement over 305, 350 or 400 comes up. In 1987 CLJ is a 305 L69 in a monte carlo, or in 1971 it's a 400 from a ONE NOTE: Casting #'s will trump the code on a descrepancy. And/or - you can check dates to make sure everything came together when original. Other pieces and parts should have been on it, and check those casting #'s. Once you identify something - like the above vette block, then you can conclude what The thing is - you need more than the casting #. If you're trying to buy a 350 and you see this thing laying on the ground, then there it is. trying to decode "3970010" is almost pointless. but using these 2 things, I already know EXACTLY what this was.ġ970.

I can GUESS the casting # is 3970010 and check casting dates, etc. If that happens to be the vehicle this engine is currently sitting in they "match". Knowing this, I can conclude the original vehicles VIN is or was 1Q87T3N132794.

#Chevy forum vehicle identification number decoding manual

So I'm dealing with something from a 1973 Camaro.ĬLJ in 1973 is a 245 horsepower 350 used in a Z28 Camaro mated to a manual transmission. I know Norwood built Camaros - among other things. Quickly from the partial vin I know this is a Chevy (1) 1973 model year (3) built in Norwood Ohio (N).ġ32794 is the unique vehicle serial number (to match against vehicle VIN). I can see the partial VIN (13N132794) and the engine code (V0112CLJ).