G'day fellas, picked up a heap of parts yesterday and just wandering I have 4 cranks 2 cooper s and 2 large journal 1100 s cranks. I had a fella tell me that if you tap a crank and it doesn't ring it's cracked.... Is this the case all the time? Because one crank doesn't ring like the others. Also got 10 1275 primary gears 40mm weber n lynx manifold, twin cooper s su's and a few other bits and bobs so some of these wil be in the for sale section over the next week or so keep your eyes peeled.

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

Curious, which crank sounds dull?

I'll have to have another look but I think it's one of the 1100s cranks

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

Sounding dull is a pretty good indicator of a crack but it's not infallible.
Conversely I've had ringers that were found cracked when magnafluxed or dyechecked.

[edit] Stand it on one end and then ding a web with a spanner. Repeat with it standing on the other end. This can help isolate where the crack is, if one way rings and the other is flat.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

as said before, it may still be cracked even if it does ring
In my opinion if it holds the ring for a fair period of time
it is usually a very good bet it is not cracked,
I has always been My experience that if it does not ring
it is cracked, That is not to say it cannot happen.
but I would not buy a crank that did not ring

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" A Hundred Years From Now It will not Matter what my Bank Acount Was,
The Sort Of House I Lived in, Or The Kind Of Car I drove ... But The World May Be A Better Place
Because I was Once Important In The Life Of A Child"

I won't buy a crank unless I dyecheck it first...
There are several other detection methods but dyecheck is cheap and cheerful, it works fine on surface cracks.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

So what's a ballpark figure of a dyecheck?

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1964 smooth roof panel van
1967 Mk 1 X-Police cooper s
1970 mini k
1975 leyland

Here's the kit description.
http://www.rocol.com/products/non-destr ... esting-kit

Sold by Blackwoods or other Rocol distributors.
http://www.rocol.com/distributors/index ... talworking

No idea what it costs, as mine came `gratis'

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.