The following warnings occurred:
Warning [2] Undefined variable $search_thread - Line: 60 - File: showthread.php(1617) : eval()'d code PHP 8.1.31 (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



Austinsevenfriends › Austin Seven Friends Forum › Forum chat... v
Block and head identification

Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Threaded Mode
Block and head identification
Youngseven Offline
Junior Member
**
Joined: Mar 2020 Posts: 16 Threads: 10
Reputation: 0
Location: Guildford
#1
22-05-2020, 05:33 PM
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
Reckless Rat Offline
Resident Frog
*****
Joined: Aug 2017 Posts: 2,400 Threads: 33
Reputation: 36
Location: Deepest Frogland 30960
Car type: 1933 RP Standard Saloon
#2
22-05-2020, 07:03 PM
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
JonE Offline
....
*****
Joined: Aug 2017 Posts: 3,329 Threads: 372
Reputation: 16
Car type:
#3
22-05-2020, 07:05 PM (This post was last modified: 22-05-2020, 08:04 PM by JonE.)
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!
https://ulster7.wordpress.com https://sevenrk.wordpress.com/
Reply
Ian McGowan Offline
Administrator
*******
Joined: Aug 2017 Posts: 254 Threads: 3
Reputation: 6
Location: Shropshire, UK
#4
22-05-2020, 07:11 PM
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
Mike Costigan Offline
former 'Grey Mag' editor
*******
Joined: Aug 2017 Posts: 3,004 Threads: 168
Reputation: 37
Location: Sherwood Forest
Car type: 1938 Talbot Ten Airline
#5
22-05-2020, 08:52 PM
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)