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Crankshaft

I have 2 old crankshafts (in original packing).

I think first might be a 970 S item. Cast no is AEG171 EN40B and second might be 1100 crank. Cast No 12A298

Any experts on old BMC Part nos out there that can confirm?

Reply to
Owen McKeown
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Here are some places to look:

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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 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

So, according to the above list, your first number is the 1071 rather than the 970 and your second number is the original 997 cc Cooper.

-RF

Reply to
-Wee Rocket

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