Correct head for my 1071s

[jbz23]

Hi all

What’s the correct cylinder head for my June 64 1071 s ?

AEG 163 or 12G940 ??

Cheers

[iain1967s]

12A185 (yellow) up to Aug/Sept 1963, then AEG163 (blue) through the end of 1071S production in 1964

12G940 didn't come into production until 1969 for the Mk3 1275 S

[Herbert]

Thats not correct. Ive owned my feb 1970 mk ll s since October 70. I still run the same head andits a 12G940 casting

[iain1967s]

The 1071 S dates I posted are the change points from AKD recorded by Parnell. October 1963 for introduction of AEG163, so that would be the correct head for Jabez’s June 1964 car.

12G940 big valve head [12G1805] was fitted to Mini Mk3 1275 S and MG1300/1300GT production from 1969. Also used as the BMC warranty / service part for replacing cracked AEG163 heads. See prior discussion and ADO16 info.

Here’s what Parnell has to say about 12G940 dates, and overlap with Mk2:

[jbz23]

Thankyou for the information

much appreciated

jabez

[AndyPen]

Just to confirm, my Feb 64 1071 motor still has its original head - the 'blue' 163.

[coopertim]

My May 63 1071 has its original yellow 185 head.

Tim