If I am not wrong, I am thinking engine number 11691835 was made ca May 1925. Any thoughts, and thanks.
May 04, 1925 there were 8,120 car made that day.
Your number 11,691,835 was include on the Engine Log book for May 4, 1925 (ref page 532 of Bruce McCalley's "Model T Ford). But it would only have been assembled and stamped that day if it was assembled at the River Rouge main engine assembly section. If it was assembled at some other assembly plant, then it would have been assembled days or weeks later (ref page 501 Bruce's book -- see the bottom of the first column on that page and the explanation continues on the top of the second column).
And all of that is predicated on the number being stamped on the same block that Ford first stamped the number on. If that block was damaged beyond repair (frozen, piston thrown through the block etc.) then a replacement block could have been purchased and installed. Ford dealers were instructed to stamp the original engine serial number on the replacement block.
Hap l915 cut off
Thanks for the information. This engine is in my car, which is/was pretty original. I had the major work done on the engine, figuring on keeping it till my Grandkids got it, but they want AC, Power Steering and all the rest. I don't think that head had ever been off the block, and there was no ridge to speak of, so I got lucky, I bought it out of a Museum. Thanks again.
Model T engines don't get ring ridges at the top, as the top ring actually goes to the top of the block deck.