Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Micropolishing a crank at home

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Old Jun 4, 2008 | 11:55 AM
  #1  
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Default Micropolishing a crank at home

I know this can easily be done, but I'm just not sure what grit sand paper to use. Does anybody have any first-hand experience doing this?

I saw one person said to use 600 grit which seems a little rough.
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Old Jun 4, 2008 | 12:10 PM
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From: bum-fuk egypt
Default Re: Micropolishing a crank at home (HMTforlife)

dont think i would do it that way. but i remember reading about using a nylon rope and wrap it around a few times and pulling it back and forth polishing the surface. most will recomend a shop doing it with the right tools and balancing it.
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Old Jun 4, 2008 | 12:45 PM
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Default Re: Micropolishing a crank at home (apexi_rsx)

Thanks for contributing nothing to this thread.
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Old Jun 4, 2008 | 12:50 PM
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Default Re: Micropolishing a crank at home (HMTforlife)

What we used to do in my machine shop class is get some (i want to say) 1000 grit sand paper and rub it on a piece of metal we have laying around until it got very dull, then we would use it on cranks.
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Old Jun 4, 2008 | 01:02 PM
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Default Re: Micropolishing a crank at home (Luserkid)

Thanks for the info

Any other tips?
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Old Jun 4, 2008 | 02:30 PM
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Default Re: Micropolishing a crank at home (HMTforlife)

when i polish them at my work i just rip thin strips and wrap it around the journal and then cross them and move your hands back and forth. It will pass back and forth evenly. Just look for any imperfections or pitting. You'd have to get pretty western with some fine sandpaper to mess a crankshaft up
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Old Jun 4, 2008 | 03:07 PM
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Default Re: Micropolishing a crank at home (HeikDiesel)

What grit do you use?
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Old Jun 5, 2008 | 05:26 AM
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Default Re: Micropolishing a crank at home (HMTforlife)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HMTforlife &raquo;</TD></TR><TR><TD CLASS="quote">What grit do you use?</TD></TR></TABLE>

320
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Old Jun 5, 2008 | 07:12 AM
  #9  
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Default Re: Micropolishing a crank at home (HeikDiesel)

Seems pretty rough, why didn't you use a finer grit?
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Old Jun 5, 2008 | 07:28 AM
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Default Re: Micropolishing a crank at home (HMTforlife)

Just what I was always told to use by my supervisor. Clearances are a little more loose than honda engines (.003") for main and rod bearings but I still think that anything really fine wouldnt do much to the chrome plating
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Old Jun 5, 2008 | 07:08 PM
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tthis is the bottom end why risk it?
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Old Jun 6, 2008 | 03:52 PM
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Default Re: (apexi_rsx)

yeah coming from those who worked with non-hondas, they find honda's tolerances to be a bit loose, but after years of failing to outengineer honda in my garage, i trust their design, hehe.
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