In one of the sprite- Midget books I have, I thought it mentions that
the 1100 crank as used in them wasn't very strong and the weakest of the
several versions. The Cooper crank was better.
Rich C wrote:
>
> I recall reading original BMC Service bulletins circa 1964 indicating that
> the 1100cc crankshaft had only surface hardened (case hardened) crankshaft
> main and rod journals. This means that if any machining is done on these
> journals, steps must be taken to ensure the new surfaces must be rehardened.
> I'm sorry that I don't have this bulletin any more to be able to
> specifically quote bulletin number, etc. but I'm sure this was the case.
> Certainly worht checking to be on the safe side.
> Rich Chrysler
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