Fan Keeps loosening on water pump
Hi all:
I have a question about my 4 blade, stamp metal, riveted fan loosening up on a new stainless water pump shaft. My fan was sound, and has been on the car since restoration in the 50's, I rebuilt the water pump last year and installed a new stainless shaft from Brattons or Snyders, (I haven't looked for my invoice) and now the fan has loosened up a couple of times. I've been able to get the cotter out to tighten the nut which cures it for a few hundred miles, and this last time, it wasn't very loose - I just barely tighten it one notch. So it seems to be getting better, or tighter.
Should I just bite the bullet and take the rad off and see what's going on? Or could this be getting the key re-seated, or something? Are the shafts known to be off in the taper in some shafts?
Just looking for input.
Thanks,
Roy
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