14 replies to this topic

[clarks.2006]

Anyone have a guide to them or can tell me what this means?

12HD26 101533

The guy i bought it off said it was from a metro but i dont have a clue if hes telling truth etc so if someone could help i'd appreciate it. I also wasn't sure what section to put this post in so im sure here should be ok thanks

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Edited by clarks.2006, 19 August 2006 - 04:32 PM.

[Sprocket]

Try this

http://www.theminifo...hp?showforum=15

or this

http://www.theminifo...x...Search&f=22



Tell tail sign to me that its a turbo engine is the oil drain where the fuel pump should be.

The only difference between this and a standard engine is the pistons, the compression ratio is 9.4:1

if its the original gearbox it will have a bigger first motion shaft support bearing, as will the flywheel housing. Thing is it has the pre verto clutch on it, some early A+ engines had this, but if its a late engine then its been changed from a verto.

[Guess-Works.com]

Early turbo engines also had the plain main bearing before all A+ 1275's got it..

If the heads a turb the stem on the exhaust valves will be different to the inlets ( can't remeber off the top of my head if they are bigger or smaller tho' )

[clarks.2006]

So this could be a turbo engine? I hope so lol. The only way i can find out is by taking head off and checking the valves? Please more info!

[Sprocket]

Oh yeh Well spotted bat man (GuessWorks)

The exhaust valve stems are larger, something to do with sodium cooling, what it actualy is phisicaly, i dont know.

Easy to tell, just look at the tops of the stems where the rockers are, the exhaust valve stems should look physicaly bigger then the inlets.

Early/ late turbo 'engine' is the same as any late A+ 1275 except for the pistons as above. The cam is standard profile, not MG profile.

[SCURVY DOG]

if it is a turbo and you need one have a spare one including inlet exhaust mainfolds and carb
etc

[Dan]

If it started it's life as a turbo then there will be a clue. The turbo cylinder heads were hand selected from the foundry to be those with the most space in the water jacket (all castings are slightly different from each other). These were stamped with a small T in the corner of the heater boss area of the head and sent for machining and assembly to turbo standards. I think all original turbo heads have this mark but I could be wrong, not entirely sure but I know some of them do.

And yes the exhaust valve stems are bigger, they are tubes filled with liquid sodium. If this is a turbo and directly out of a Metro then it would have a tee-piece behind the oil pressure switch and a line leading from that to the rear. I think it should also have the oil/water intercooler fitted above the filter too. I think all Metros had verto clutches, it was only Mini's that kept the old pre-Verto setup when the A+ was introduced. Mini kept the setup for 2 years after the A+ came in so there's a lot of cars like that.

[Sprocket]

No, the metty turbo used an oil to air oil cooler. I thought the same as you Dan, but was corrected by the Turbo Minis guys.

At the end of the day, it might be an NA engine with the turbo oil drain adapter fitted, its only two bolts. As to why any one would do that, well, i'll let yo think about that one.

[Sprocket]

Oh and a thought on the clutch.

The A+ was developed circa 1978 and sported the non verto clutch. The Metro was introduced in 1980. I suspect the A+ was fitted to minis as early as 1978 with the non verto clutch. It is not totaly inconceveble that the first few Mettys had non verto clutches, Rover being Rover ( Austin back then)

Later Metros used a cable clutch. When fitting a metro engine in a mini you change the arm for a hydralic verto one. However, you can also replace the whole clutch from the engine that was already in your mini which may have been non verto.

[clarks.2006]

Metro 1300 HLE 1275cc 12HA08AA, 12HB, 12HC, 12HD, 12HE,
12HF.
MG Metro 1300 leaded fuel pre 1989 1275cc 12H996AA, 12HD24
MG Metro 1300 unleaded post mid-1989 1275cc 12HF01
MG Metro Turbo leaded fuel pre 1989 1275cc 12HD26
MG Metro Turbo unleaded 1275cc 12HF01
Austin Metro Sport .. 1275cc 12HF02
Austin Metro GTa .. 1275cc 12HF02
Austin Metro's with unleaded engines, 1275cc 12HE24, 35, 39, 40, 41, 42, 67 up to 75.

http://www.turbomini...p...vt&tid=5352

Found this on here Im well pleased apart from the fact its leaded What would i need to change this??

[Guess-Works.com]

how does that help, unless you quoted the engine number wrong to start with..

12HD6 is not listed above other than under the generic 1300 HLE guise.

[clarks.2006]

C**p sorry the engine code was 12HD26 lol Checked it again to make sure. Now i feel a tit

Edited by clarks.2006, 19 August 2006 - 04:36 PM.

[Sprocket]

lol which one, left or right?

[clarks.2006]

Both I am now wondering what i should do? Shall i buy all the turbo bits and create a turbo mini? Shall I just run it as a N/A engine? What are your oppinions and views? What shall i do!

Edited by clarks.2006, 19 August 2006 - 05:33 PM.

[clarks.2006]

Found This.....
http://members.home..../metronmbrs.htm

Mines 5th one down on right