mk1-forum.net

mk1 wrote: ↑Wed Jul 06, 2022 8:53 am Date codes on blocks read like this:

Assuming "S DD M Y" format of the block date code:

S = Shift. A=first, B=second
DD = one or two digit day-in-month
M=Month letter, see note below
Y=Year digit

So far, we have found photos/details of AEG312 blocks with all letters A through M except B,E,I.

I suspect letter "I" is skipped, so the resulting table would be:

A Jan
B Feb
C Mar
D Apr
E May
F June
G July
H Aug
J Sept
K Oct
L Nov
M Dec

Props to Paul Harris [TECH396] for the groundwork he did identifying sequences on other marques.

Spider wrote: ↑Wed Jul 06, 2022 7:51 am There's some here;-

https://www.minispares.com/catalogues/c ... px?1~1~234

mk1 wrote: ↑Wed Jul 06, 2022 12:26 pm It wasn't available when John wrote the book. It was only deciphered by our members iain1967s & TECH396 in the last year or so.

iain1967s wrote: ↑Thu Jul 07, 2022 12:32 am Also recently posted by NZmember is this comprehensive MiniSpares page which has extensive cylinder head casting history, and includes an original BL document “Date Standard for Ferrous Castings” at the bottom which shows the same scheme was still being used into the 70s/80s.

Copy attached.

Nevsmini wrote: ↑Sun Jul 10, 2022 10:33 am Any info on the earliest thick flange block casting.

251 ENG wrote: ↑Sun Jul 10, 2022 7:02 pm Earlier dated one I have record of is 14/1/68 and was told it was vita race engine so it looks like thick and thin flange block had an overlap period.
Somebody did say once that Abingdon used them on 68 monte

BAD942B wrote: ↑Mon Apr 24, 2023 3:56 pm so 30 D4A IS 30th April 64 ?