is this sutible for a turbo lump
Turbo Mini Forums

ive been saving the pennys and brought my first turbo compleat setup. well so it was sold to me as. iv broken it down to have a look at condition and done some resurch and it seems these pistons are hepolit 20142 ive been looking at diffrent sites some say thay are standerd metro and i also read that thay are turbo pistons if anyone knows what thay are ill be very greatfull

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I cant make out the 4th character of your engine number that well but going off a code list I have saved,12H-D26 was the leaded metro turbo & 12H-FO1 was for both n/a mg metro and turbo unleaded lumps.

Im not clued up enough to remember piston codes of the top of my head but im sure someone will know.

Cheers Ross.

Edited by rosco454 on 3rd Apr, 2010.

hmm done a bit more digging cant find much out about these pistons. but the block comes back as a standed metro not turbo so unless its been modifid ie these pistons are aftermarket turbo pistons ive been sold a compleate turbo setup with a bog standerd metro engine GREAT

so im gessing this head is bog standerd and not turbo aswell its a 12g940

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As long as you were planning a rebuild (most likely needed anyway) it doesnt really matter too much.

Turbo Phil has a section on his site

Also there is one on here covering the same subject as well

Edited by rosco454 on 3rd Apr, 2010.

Not so judging from the picture it looks like you have got the same size valves as an MG metro head. Looks identical to severval I have.

Own the day

If you can take out one of each the numbers on the stems should be TAM 1059 and TAM 1061 if they are then the above stands.

Own the day

thanks guys yes thay are the valve numbers so it looks like ive got a mg metro head with a metro block and all the turbo gear to run a turbo engine hummm still no closer to finding out what these pistons are though

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=344405

The Turbo and Non-turbo Heads all had the casting number 12G940, but this is not their part number! (Why did BL make it so easy!) Nearly every 1275 cylinder head made since 1968 has had this casting number, except for the pollution types with the air injection port in to the exhaust port.

The turbo head will have exhaust valves sized at 1 5/32" (which is same as a stock 1275) however they are sodium cooled. These are quite easily identified as the stems are noticably larger in diameter and use the 3 groove keepers.