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Post by pdxjim on Dec 25, 2019 23:51:08 GMT 1
Head bolts looking scruffy with chipped zinc etc  Easy enough to gently clean up on the wire wheel, and they look pretty good as is. How well will they hold up to the elements without re-plating, paint etc? Dry storage, rarely ridden in the rain etc |
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Post by JonW on Dec 26, 2019 0:11:23 GMT 1
plate them, its the only way. they will rust readily of you dont.
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Post by oldelsieboy on Dec 26, 2019 9:24:59 GMT 1
Got some re-plated bolts ready to go, £30 a set  OEB |
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Post by liffy16 on Dec 26, 2019 9:47:21 GMT 1
Definitely need something on them have used clear lacquer in the past but plating is the best solution
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Post by earthman on Dec 26, 2019 10:37:33 GMT 1
Does the plating just come off over time? Is it due to the constant heat cycles of the engine?? If it's down to a socket/spanner being placed over them, how many times you taking the head off the bike to wear that coating off??
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Post by marrcel on Dec 26, 2019 10:48:20 GMT 1
That reminds me to coat them and let the coating hardened. From experience i know i put the coating on the bolts just before installing with the spanners.
Now i think of it, after retorcking i have to put a little bit of lacker on it.
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Post by midlifecrisisrd on Dec 26, 2019 11:11:59 GMT 1
They need zinc'd
The humidity in the air will make them rust
The original zinc oxidises and eventually disappears over the years
Steve
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Post by earthman on Dec 26, 2019 11:53:53 GMT 1
The original zinc oxidises and eventually disappears over the years Even if you left the bolts sitting on a shelf in the garage?  |
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Post by reedpete on Dec 26, 2019 11:56:29 GMT 1
Re plating is defo best and doing nothing at all will result in them rusting as fast as anything. Three easy DIY ‘temporary’ alternatives are;1. grate blackening (a graphite polish), 2. gun barrel ‘blueing’ a few coats gives nice effect, 3. Black Phosphate , varying hues with time of exposure.
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Post by steeley on Dec 26, 2019 12:31:48 GMT 1
Hi , i cleaned up a set of lc head bolts and heated and quenched them in oil to put a bit of protection on them . As john say's plate them for long term protection diy kits are cheap enough i nickle plated some brake end fittings and some disc bolts some years ago .
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Post by pdxjim on Dec 26, 2019 19:23:18 GMT 1
Thanks for the replies ...
These head bolts came off a low mile JDM import, that unfortunately spent a decade outdoors in a covered carport.
At this point, I'll likely coat with heat cured RAL6006 rattle can paint, or oil quench (which is easy and has worked very well for me in the past)
As and aside, I've tried gun bluing on old carbon steel chisels and antique chippy tools and they've rusted almost immediately. Seems even faster than without the bluing.
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