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+--- Thread: Block and head identification (/showthread.php?tid=4396)
Block and head identification - Youngseven - 22-05-2020
Hi all, I have two blocks and two heads which I need some help in identifying their age and what model they may have been off.
Block one - 25516 (has a screw in core plug)
Block two - 105340, 1a504 af4, m228094
Head one - 1a38 u3 af1
Head two - 1a56 k6 af3, 60171
Thankyou in advance,
RE: Block and head identification - Reckless Rat - 22-05-2020
The correct number to quote on your engine blocks is the one stamped in the valve chest cover. The second one quoted as M228904 is a crankcase number from 1935. Blocks with screw-in core plugs date from 1930 and earlier.
RE: Block and head identification - JonE - 22-05-2020
https://sevenrk.wordpress.com/2019/05/31/austin-7-low-compression-heads/ gives good summary of the LC heads...
Annoyingly, I dont recognise the second head though. Does it have a date stamp? as we may need to add it!
RE: Block and head identification - Ian McGowan - 22-05-2020
block 25516 I would estimate as some time 1926
block M 228094 I would estimate as mid 1935
Head 1A38 Well, I have a 1A38 AF2 head with priming ports blanked off with brass plugs which I believe to be the original low compression head on my 1929 engine.
Head 1A56 outside of my experience but no-doubt someone else will know.
RE: Block and head identification - Mike Costigan - 22-05-2020
The AF numbers refer to the appropriate Austin Foundry, and were there for quality control purposes; they have no relevance to identification of the individual part.