The following warnings occurred:
Warning [2] Undefined variable $search_thread - Line: 60 - File: showthread.php(1617) : eval()'d code PHP 8.1.27 (Linux)
File Line Function
/inc/class_error.php 153 errorHandler->error
/showthread.php(1617) : eval()'d code 60 errorHandler->error_callback
/showthread.php 1617 eval




Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Block and head identification
#1
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,
Reply
#2
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.
Reply
#3
https://sevenrk.wordpress.com/2019/05/31...ion-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!
Reply
#4
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.
Reply
#5
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.
Reply


Forum Jump:


Users browsing this thread: 1 Guest(s)