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Canadian car identification here: Serial Numbers 1935-1964 | 1965-1966
and more information in the reference section here.
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Thread: 340cui id

  1. #1
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    340cui id

    hi, i need help to decode two Engines. 340ci 1966
    137455M
    on right side i can see 353 and under servo 6H226988 with odd looking numbers 6 and 9 witch has a line in them.

    Engine2 1374757 6 no letter. 6D1 0 or c 754

  2. #2
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    the EIN / Engine Identification Number is just a truncated form of the VIN / Vehicle Identification Number that the engine came from. unfortunately, that means that there's not a whole lot of information that can be discerned from the EIN beyond year and the plant that the car came from unless you've got a prefix of 7, 8 or 9 on the Sequential Production # portion of the EIN.

    6 H 226988

    6 == 1966
    H == Flint Michigan
    226988 == sequential production number, will match last six of VIN

    6 D 10754

    6 == 1966
    D == Doraville, Georgia
    10754 ==sequential production number, should be six digits

    an SPN that began with "9" would belong to a Riviera, but that's not going to happen with a small block engine anyways. for 1966, all Rivs would have had a 401ci or 425ci Nailhead.


    casting #s are very sketchy for these early engines so if you could have a look at the "Small Block Casting #" thread and help us out we'd appreciate it.

    https://www.teambuick.com/forums/sho...number-project


    the two letter Engine Code stamping will give you slightly more information, but not much:

    https://www.teambuick.com/reference/...gine_where.php

    your engines should be stamped
    MA == 2 barrel carb
    MB == 4 barrel carb and intake
    MX == low compression export engine

    ML would denote a 300ci 2 barrel.

    "M" is obviously the year code for the Engine Code stamping. 1965s are all "L" coded and 1967s are all "N" coded.

    https://www.teambuick.com/reference/...ine_number.php


    how did you come to wind up with TWO 340ci engines in SWEDEN? those are pretty rare ( 1966 and 1967 only ) even here in the States.
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

  3. #3
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    Quote Originally Posted by bob k. mando View Post
    the EIN / Engine Identification Number is just a truncated form of the VIN / Vehicle Identification Number that the engine came from. unfortunately, that means that there's not a whole lot of information that can be discerned from the EIN beyond year and the plant that the car came from unless you've got a prefix of 7, 8 or 9 on the Sequential Production # portion of the EIN.

    6 H 226988

    6 == 1966
    H == Flint Michigan
    226988 == sequential production number, will match last six of VIN

    6 D 10754

    6 == 1966
    D == Doraville, Georgia
    10754 ==sequential production number, should be six digits

    an SPN that began with "9" would belong to a Riviera, but that's not going to happen with a small block engine anyways. for 1966, all Rivs would have had a 401ci or 425ci Nailhead.


    casting #s are very sketchy for these early engines so if you could have a look at the "Small Block Casting #" thread and help us out we'd appreciate it.

    https://www.teambuick.com/forums/sho...number-project


    the two letter Engine Code stamping will give you slightly more information, but not much:

    https://www.teambuick.com/reference/...gine_where.php

    your engines should be stamped
    MA == 2 barrel carb
    MB == 4 barrel carb and intake
    MX == low compression export engine

    ML would denote a 300ci 2 barrel.

    "M" is obviously the year code for the Engine Code stamping. 1965s are all "L" coded and 1967s are all "N" coded.

    https://www.teambuick.com/reference/...ine_number.php


    how did you come to wind up with TWO 340ci engines in SWEDEN? those are pretty rare ( 1966 and 1967 only ) even here in the States.
    Thanks for the information.
    However,, neither of the Engines have double letters. So i cant find MA, MB, MX.

  4. #4
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    the two letter Engine Code should be stamped on the face of the block between the center exhaust ports.

    you may need a wire brush and brake clean in order to get the grime cleaned off so you can read it.

    see this page here:

    https://www.teambuick.com/reference/...gine_where.php
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

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