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1940 engine identification...

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Evening all!   Looking for help figuring out an engine code for my Buick. Body is a 1940, engine code is 43811723 but is painted turquoise. As we are just starting to restore it, any information would be extremely helpful! Thanks!


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Welcome, Lee

  That is a 1940 engine number.  The first digit , in this instance 4, is for the Series,  40 series being a Special.  Post war , starting with 1946 the series digit was moved to the back, or last, place.

  So 4  [Special]  3,811,723 is your engine number. 1940 first engine number was 3,786,214.    1941 was 4,074,859,


  As for the paint? Just repainted some time along the way.





Edited by Ben Bruce aka First Born (see edit history)
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