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mvent
PostPosted: Sun Nov 04, 2012 1:49 pm 
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Location: Rhode Island
About to clean off crank cases with glass/walnut shell mix,it worked well on jugs and heads, what precautions should be taken?Should gasket surfaces and bearing surfaces be taped off?
Thanks
Mike

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mraxl
PostPosted: Sun Nov 04, 2012 1:52 pm 
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Location: Dandridge, TN, USA
Don't blast gasket surfaces and plug all bolt threads.

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RODH2
PostPosted: Sun Nov 04, 2012 5:54 pm 
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Location: Milang, South Australia
If you can find someone with a plastic bead blaster, you will not have to mask/plug. Hot soapy water spray wash, and plenty of compressed air - rinse - repeat!

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Dewman418
PostPosted: Sun Nov 04, 2012 8:30 pm 

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Location: Auburn Ca
Somebody awhile back got theres vapor blasted and even when it got oily it just wipes clean.
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Tim Steele
PostPosted: Sun Nov 04, 2012 11:40 pm 
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Or you can send them to me.

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mvent
PostPosted: Mon Nov 05, 2012 11:21 am 
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Vapor blasting would be my first choice,but no one local has that ability.Will plug and tape off best I can, paranoid about beads getting where they shouldn't,just going to have to wash them several times and blast with compressed air and hope for the best!

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Ric
PostPosted: Mon Nov 05, 2012 6:21 pm 
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Lime soda ash glass beads. Will not remove material. You can blast any surface. Wash out thoroughly. Will look like a brand new casting. Easy starting point for polishing. Fast.

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mvent
PostPosted: Mon Nov 05, 2012 6:59 pm 
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Just curious, would walnut shells themselves be less disastrous to internals than glass beads if a spec was left behind?Plan on being as thorough as humanly possible with cleaning but still human.

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ThreePipesSmokin
PostPosted: Mon Nov 05, 2012 7:25 pm 
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In my limited experience, walnut shells on their own do almost nothing, you must use glass beads or other media to get it clean, then the walnut shells give more of a satin finish. I found it more trouble than it's worth to keep switching media, but if you have more than one cabinet... :think:

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RODH2
PostPosted: Mon Nov 05, 2012 9:18 pm 
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mvent wrote:
Just curious, would walnut shells themselves be less disastrous to internals than glass beads if a spec was left behind?Plan on being as thorough as humanly possible with cleaning but still human.

That is why plastic bead blasting is the go - widely used in aviation. Of course cleaning is important, but that is your next best insurance!

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