Casting Block Numbers

[bubbacluby]

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.

Here are some B's

[251 ENG]

All 1071/970 blocks have it cast on front .
Early 1275 also on front then moved to backas in previous pictures

[mini1973]

There's some here;-

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

Thank you

[mini1973]

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]

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.

[janerick3]

When were the castings changed over to thick flanges?

I have a thin-flange block that appears to have a September 1967 casting date (engine is in the car so it is hard to read).

[mk1]

Sept 67 is the absolute last gasp of the thin flange block. I doubt there are any younger than that.

[mini1973]

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.

Thanks for all the information everyone.

Anyone have a list of Gearbox casting numbers?

[251 ENG]

Here is a late thin flange

[Nevsmini]

Any info on the earliest thick flange block casting.

[251 ENG]

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]

so 30 D4A IS 30th April 64 ?

[mk1]

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

[BAD942B]

this is the number below the dynamo that we fitted to the car in 1981

[BAD942B]

and this is the spare early block with the number under the dynamo aswell

[BAD942B]

a link to technical where the photo may be better
http://mk1-forum.net/viewtopic.php?f=3&t=36467

[Ronnie]

Any info on the earliest thick flange block casting.

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

It looks like a thick flange on this one, Nov 66 build.

[BAD942B]

another S block, later one

[BAD942B]

so 30 D4A IS 30th April 64 ?

what date is this code please, see photo

[hinesy1275]

OK here's one from 1974?