2 replies to this topic

[Gazza7963]

Hi I’m new to the group, I’ve just bought a mini shell and engine, the guy I bought it off told me it’s a 1275 cooper engine, the plate no is 12H/495 F/9083. Could any of you guys tell me what I’ve got? Thanks

[fokko]

Congrats on your new Mini!

Although it's a 1275, it doesn't look like a specific Cooper engine;

 

 

Source Vehicle :  1300 GT 

Engine type & CC :  A Series 1275 cc Transverse mounted 

Fueling :   

Engine features :  Lucas C40 dynamo with -ve Earth S' type design variants

Gearbox features :  Close Ratio Remote control gearbox, 4 synchro' 3.44:1 final drive 

 

Source: http://guessworks.co...Tech/engine.htm

Edited by fokko, 07 August 2023 - 02:19 PM.

[Itsaminithing]

(Austin/Morris ADO16) 1300GT engine so not a genuine Cooper 'S engine.... but as the Guessworks site says 'S type design variant'.

 

To quote mab01uk ....

"1300GT is nearest engine spec to the Mk3 Cooper S with 11 stud head, twin SU's but without the block tappet covers, much sort after in their day by Mini owners and like any A-series engine everything depends on wear and condition rather than age"

& from an ADO16 guru....

"very early 12H 70 BHP engine had an EN40B crank with 1.5/8 inch journals, and large valve 11 stud cylinder head. These engines are solid wall blocks and date from late September 1967 and were only used in the Riley and MG 1300. It is important to remember that the EN40B crankshaft out of this solid wall engine has a different centre main bearing width.
The 12H 70 BHP engine a sister of the above had an EN16T crank with 1.3/4 inch journals, heavier connecting rods, same pistons and large valve 11 stud cylinder head. These engines date from November 1967 and were only used in the Riley 1300, MG 1300 and Austin / Morris 1300 GT. This same engine was also fitted to the Innocenti Cooper 1300".

 

(Disclaimer: all the above is true to my knowledge only IF that plate belongs to that engine)