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Sunday, July 20, 2014

Need help identifying an engine.

I believe it to be an early 80's 350 . Its an 8 cylinder. Its being put in a 1982 Chevy full size blazer. I was told thwt it came out of a vet. The numbers on the heads are not the same numbers. KC121107 T09250R is stamped on the front of the block, passenger side, behind the alternator. 8970014. Is stamped on the bottom side of the engine in the back . The heads are 8998998 30-76 Other one is 8998993 01-53 Thanks for your help

7 comments:

  1. "Numbers Matching"
    This is my opinion, and the generally accepted norm:
    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 originally used in. This match is done via the PARTIAL VIN stamp on the component. The partial VIN will match the vehicles VIN. If it does - it's "numbers matching", otherwise - it's not. done. end of story.
    Some folks use these terms loosely, or will say "numbers correct" or something to that effect. But numbers correct is not numbers matching. Again, it either matches or it doesn't. If it doesn't match - is it correct?
    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. You need to decode the engine and see if it matches the vehicle, and if the code signifies Z28 or SS equipment.
    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.
    The point of this article is to help you figure out how to decode stuff.

    The engine date must precede the car build date, otherwise something is amiss. Some engine machining operations (decking) will obliterate the engine ID.
    Engine ID Code Example: V0101CLJ - (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code)
    Another example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400)
    Code Engine Plant Code Engine Plant
    F Flint (Motor) S Saginaw Service
    H Hydramatic T Tonawanda
    K St. Catherines, Ontario V Flint (Engine)
    (McKinnon Industries Canada)
    M GM of Mexico

    Casting Date
    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)).
    Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F = Jun, G = July, H = Aug, I = Sep, J = Oct, K = Nov, L = Dec


    General Engine Block Specifications
    While 6 different bore size blocks have been produced, the small block engine can be classified into 3 bore sizes and 3 main bearing sizes. 283 blocks (3.875" bore, 2.3" main), 302/327/350 blocks (4" bore, 2.3" or 2.45" mains), and 400 blocks (4.126", 2.65" mains). In 1968 the main bearing saddles were increased in size from 2.3" to 2.45".


    CID Year Bore Main Cap
    262 1975 3.671 2 bolt ONLY
    267 1979 - 81 3.500 2 bolt ONLY
    305 1976 - 96 3.736 2 bolt ONLY
    307 1968 - 73 3.875 2 bolt ONLY
    327 1968-69 4.001 (2.3" main) 2 bolt
    350 1968-88 4.001 (2.3" main) 2 bolt
    265 1994 4.001 (2.45" main) 2 bolt
    302 1968-69 4.001 (2.45" main) 4 bolt
    350 1968-96 4.001 (2.45" main) 4 bolt
    400 1970-72 4.126 (2.65" main) 4 bolt
    400 1973-80 4.126 (2.65" main) 2 bolt

    Notes: 2 bolt ONLY means just that,. otherwise 2 or 4 bolt can mean either design...

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  2. I stumbled upon that bit of info last night too.. BUT im not quite understanding that info in relation to these numbers.

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  3. The number I use is the one on the block behind the drivers side head. Its a cast in number, not a stamped number. it corresponds to the numbers at the bottom of the chart below.

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  4. there are no engines listed with that rear of head number beginning with the number 8 so im assuming that the 8 is really a 3 and mistakes are easily made because its so hard to see or read. That number is probably 8970014 which makes it the engine below.





    1970-73 3970014 350 200 300 2/4 LA built Camaro


    Heads could have been changed and its entirely possible to have 2 different heads on it, but at least its a 350.

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  5. Correction;









    there are no engines listed with that rear of head number beginning with the number 8 so im assuming that the 8 is really a 3 and mistakes are easily made because its so hard to see or read. That number is probably 3970014 which makes it the engine below.





    1970-73 3970014 350 200 300 2/4 LA built Camaro


    Heads could have been changed and its entirely possible to have 2 different heads on it, but at least its a 350.

    ReplyDelete
  6. Awesome, THANK YOU!!
    what's do the rest of those numbers mean?
    200
    300

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  7. These
    KC121107 T09250R

    Were also stamped or casted on the engine too. Any idea what they say,?

    ReplyDelete