Hey does anybody know of the justa Cooper crankshaft is the same as the Cooper crankshaft? I know the R53s have forged rods, but the crank change too? I'm having trouble finding an answer. I'm thinking they're the same because the price on RealOEM is the same for both part, but I can't be sure.

 

According to Realoem.com they are not. Also on Penske Parts they are different.

 

Same except the S is made from a better material and its heat treated i think.
Much like the heads are the same except for the better exhaust valves.

 

So that would make them different. The MINI COOPER crankshaft is machined from nodular cast iron. The MINI COOPER S crankshaft is machined from forged steel.

 

Safe to say NOT the same...
different part numbers. Period. Same "recommended price"?! Don't think that has anything to do with parts being the same or different......using that logic....things could get interesting!!
I bet they both have different grinds....so safe to say just get the one you need.

 

That's what I figured. I just found a good deal on a refurbed justa crankshaft and wanted to see if it would work.

 

It's not forged is it? I'm looking at a Cooper S crankshaft and I can see the casting marks (left by the sand) on the unmachined bits. Is it possible it is cast and then undergoes some additional treatment process to make it stronger than regular cast parts?