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Discussion Starter #1
I've seen water pumps advertised with a hardened pulley, should I get the hardened or the regular? Other than the obvious of less pulley wear, is there any special reason for the hardened one? Thanks.
 

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Sometimes Chinese made parts are case hardened to make up for crapola metallurgy. Quality steel wouldn't require case or any other hardening. I'd find out where they're made.
 

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Discussion Starter #5
there all the same my friend
If they are all the same why does the same vendor advertise hardened and regular? Probably doesn't matter much one way or the other.
 

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The key word is probably 'vendor'. That's far different from manufacturer.
 
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