Depending on your frame of reference the situation can be described as the crank sprocket spinning relative to the crank pulley or the other way around....
I've spent quite a bit of time in South Africa, but I don't believe (while there) I ever discussed the automotive definition of "spin" or "spun", so I can't say if I would have had trouble with that terminology in a country that (for the most part) speaks the same language. While we here in America are known for speaking "American English", I should tell you that we often refer to the word "spun" as having the meaning of a rotating object having become detached from that which it is normally mated. An example would be to "spin" a tire - yes that has two meanings - one when jacked up and the other from excessive torque.... both have the tire operating outside the normal conditions. Another example would be when a bearing is "spun"... also 2 meanings with similar differential logic. Just to clarify, when a piece that is normally affixed to a rotating shaft is said to have "spun" in the context that something unwanted has occurred, the generally accepted understanding here is that the part that is said to have "spun" has broken free of normal containment. Otherwise, it's just "turning" - or as you first said in your last post.... "rotating".
The important thing is that nothing spun relative to the crankshaft.
Actually, the crankshaft pulley "spun" relative to the crankshaft - or at least relative to the pulley hub..... even though the outer belt groove stopped moving. <img src="/forums/images/graemlins/wink.gif" alt="" />
Was it Einstein that said everything is relative?).
He did have some theoretical knowlege..... <img src="/forums/images/graemlins/zombie.gif" alt="" />
Anyway, I'm glad we know what stayed in place and what let go... but wait... does "staying in place" mean that it turns with the crankshaft.... or not? <img src="/forums/images/graemlins/lol.gif" alt="" />
Good luck,
Frank
