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Crankshafts |
Posted by: KAD16V - 09-24-2015, 12:52 PM - Forum: Technical Queries / Questions - Classic Mini
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Off Mini Spares Website
Yes, contrary to what many say/express, all cranks are forged. None are cast. They wouldn't last 2 minutes in an engine if they were cast - they'd be way too brittle.
Below is a list of crankshaft identification data by forging or stamped numbers - yes, contrary to what many say/express, all cranks are forged. None are cast. They wouldn't last 2 minutes in an engine if they were cast - they'd be way too brittle. The differences are in the material used, finish machining detail and any heat treatments applied. It is by no means complete and utterly correct/infallible since Austin/Morris, British Leyland, Leyland cars, Austin Rover, rover, et al were seriously prone to not adhering to specifications and applications lists. But it is better than nothing at all!
22A62 850cc - Early type with oil feed for primary gear, 1.375" dia. tail
22A63 850cc - Early type with oil feed for primary gear, 1.375" dia. tail
22A298 850cc - Early type thin-nose crank, 1.375" dia. tail
12A670 850cc - Later type with 1.5" dia. tail
12A298 997cc - Original Cooper crank
12A375 997cc - Cooper crank with oil feed hole for primary gear
12A595 998cc - Early EN16T spec
12A1451 998cc - Later, pre-A+ EN16T spec
BHM1436 998cc - A+ spec, 1985 onwards (12A1451 forging)
12G82 1100cc - Standard across the board transverse A-series EN16T spec
AEG330 970cc - EN40B forged, non-cross drilled
AEG171 1071cc - EN40B forged, non-cross drilled
AEG315 1275cc - Cooper S, EN40B forging, Nitrided, 1.625" dia. big ends, non-cross drilled
AEG316 1275cc - Cooper S, EN40B forging, Nitrided, 1.625" dia. big ends, non-cross drilled
AEG479 1275cc - Cooper S, EN40B forging, Nitrided, 1.625" dia. big ends, cross drilled
AEG480 1275cc - Cooper S, EN40B forging, Nitrided, 1.625" dia. big ends, cross drilled
AEG623 1275cc - Cooper S, EN16T forging, Tuftrided, 1.625" dia. big ends
12G1287 1275cc - Non-S, EN16T with 1.625" dia. big ends ![[Image: IMG-20141118-WA0000.jpg?dl=0]](https://www.dropbox.com/s/kubs3idxdjf9ip7/IMG-20141118-WA0000.jpg?dl=0)
12G1288 1275cc - Non-S, EN16T with 1.625" dia. big ends
12G1505 1275cc - Non-S, EN16T with 1.75" dia. big ends
12G1683 1275cc - 12G1505 forging, non-S, EN16T with 1.75" dia. big ends, Tuftrided
CAM6232* 1275cc - Rolled-fillet radius on bearing journals, A+ with 1.75" dia. big ends
*Note: This crankshaft was used in all 1275cc, A+, transverse engines including the MG Metro Turbo. There are various un-confirmed opinions on the subject of whether the material was any different, or whether it was heat treated differently. It would appear that early Turbos had just the standard spec, EN16T, non-heat treated type fitted. Later examples certainly appear to have been heat-treated, probably an up-to-date, emissions-friendly version of 'Tuftriding' (a recognised ICI registered process) - possibly a forerunner to Nitro-Carburising. These crankshafts have a distinctly charcoal-grey/black finish - mostly detectable on the webs, water pump/alternator pulley end and in the rolled fillet radii. The later being fairly 'deep' and very even.
https://www.dropbox.com/s/kubs3idxdjf9ip...0.jpg?dl=0
I have the CAM6232 on my KAD motor which was modified by Stealth engineering in Cape Town. They shaped, polished and nitrided the crank.
My question is,
Is this crank going to handle the load or should I be looking at another type ?
According to the info above, it was possibly Tuftrided ?
Thanks in advance,
Greg.
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GTS variations |
Posted by: Miniac - 09-23-2015, 07:39 AM - Forum: General Chit Chat
- Replies (59)
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Following on from the information that's coming out in my build thread, I'd love for us as a mini loving community to put together a sort of central logging area for any and all information pertaining to the South African GTS.
As has already been discussed, we've already noticed a number of variations between similar year models and this for me has created the perfect basis to begin this thread so that we can begin to piece together the now +/-40year old models shaded history and hopefully assist future owners in their plight to restore their beloved GTSs back to (or as close to) factory spec as possible.
So please feel free to add in any and all information that you have, be it interior, suspension setup, colour and stripe, even if it seems a little insignificant, it could very well be the missing piece in another persons puzzle.
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High Torque cams |
Posted by: Sean1380 - 09-21-2015, 10:26 AM - Forum: Supreme Classic Parts
- Replies (2)
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Just a heads up.....
Three wide lobe camshafts will be getting cut this week. (25/09/2015)
R1,000 each on exchange for a good condition wide lobe cam, or R1,300 out right.
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