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  #16 (permalink)  
Old 05-30-2010, 04:54 PM
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Wow thanks for all the suggestions guys....... I guess I should have explained the situation and reason for doing this in my original post. The crankshaft only has about 1000 kilometers on it (pistons detonated) and all journals look fine I was just wanting to remove the "stain" left on them from the bearings. I will be mic'ing each journal to verify the measurements but with that little usage and visual appeal being good I am assuming I won't find anything out of the ordinary. I just wanted to "shine them up" before I rebuild this engine, I wasn't hoping on removing much (if any) material. I know at work when we rebuild transmissions and reuse certain components such as main shafts and turbine shafts, all we do to polish them is soak them in WD40 and take scotch brite pads and wrap and rub . The surfaces turn out looking like they're chrome plated but I am not so sure if this is a good idea on a crankshaft. I did read somewhere that an old leather belt works wonders to just do a basic polish which is all I really need, would you recommend trying that first?


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Old 05-30-2010, 06:22 PM
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I dont know about the leather belt, where is the abrasive? leather belt im thinking is too wide???? Plus how would you get it to turn?? I dont know.
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Old 05-31-2010, 06:46 AM
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The recomendation from the chevy power manual is 400 grit emory cloth, lubed with a little kerosene and shoe string.They say to wrap the emory around the crank, tape then use the string to turn the cloth as described above.This is the factory recomendation so it should work.
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Old 02-27-2014, 03:53 AM
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polishing with ruby stone or arkanasaw stone

I have a turbo crank that is nitrited coated ..I want to polish ..moldmakers use ruby stones,and arkanasaw stone to polish ? thanks for all replys
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Old 04-14-2016, 10:51 PM
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Random +1 Reb CrystalBlueVib Stumbled across a video then this explanation. Genius! Not for reviving a busted pice of metal but actually laying a finish on the old one. I'm doing this too my 1993 Subaru Justy tomorrow morning and I really needed to see this explanation, rawhide seems better than a shoe string initially.
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