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Thread: Clean up Nikasil bore?

  1. #1
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    Clean up Nikasil bore?

    Doing rings on a XT225. Bore is in good shape but has some carbon above the ringland.

    Whats the best way to clean it up?

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    I've had good luck with a witches brew of two parts white spirits to one part isopropyl alcohol, old toothbrush or similar and have at it

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    Not that I would ever admit to doing it, but 0000 steel wool is quite useful in delicate situations.
    Some call it angel hair, in Mitre 10 they call it fine woodworkers steel wool.
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    Nikasil isint as fragile as you may think. That's the whole idea of it.
    I've had great success using all kinds of things I'd get roundly criticised for using, after piston seizure.

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    Quote Originally Posted by sidecar bob View Post
    Nikasil isint as fragile as you may think. That's the whole idea of it.
    I've had great success using all kinds of things I'd get roundly criticised for using, after piston seizure.
    Correct. It does after all, require a diamond hone to put a pattern on it.
    Wet and dry paper isn't even going to leave a mark...
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  7. #7
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    Quote Originally Posted by Grumph View Post
    Correct. It does after all, require a diamond hone to put a pattern on it.
    Wet and dry paper isn't even going to leave a mark...
    Yep, I've gone as low as 320 with WD40 to get rid of the alloy bits, working up to 600.

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    You are supposed to diamond hone to perfectly round.

    Scotchbrite stolen from under the kitchen sink will do in a pinch.
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    Quote Originally Posted by F5 Dave View Post
    You are supposed to diamond hone to perfectly round.

    Scotchbrite stolen from under the kitchen sink will do in a pinch.
    When you say hone...do you mean one of those three legged things you fit in a drill?

    I would imagine all they do is follow the existing shape and scuff it up a bit.

    Nikasil must be pretty hard as I have 35 year old BMW cylinders, that just needed a scrub up.

    I don't think you would want to put a hone near nikasil but then I am only a pen pushing office worker.
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    Jesus no! No a proper hone for nikasil is the stuff of engine reconditioners not home kit.
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    Quote Originally Posted by sidecar bob View Post
    Yep, I've gone as low as 320 with WD40 to get rid of the alloy bits, working up to 600.
    We used to use some type of acid which took the alloy off with out harming the Nikasil
    "If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough power."


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    Quote Originally Posted by Kickaha View Post
    We used to use some type of acid which took the alloy off with out harming the Nikasil
    I use that partly to prove if there's alloy still on the bore. It foams the alloy up White & leaves the bore alone, if it foams, I keep cleaning it.

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    Drain cleaner is sodium hydroxide and attacks ally while leaving an iron bore alone. Used on nikasil it should do the same thing but the coating is a bit porous. If it got through it could attack the ally behind. If so the plating may fall off at a later date. . . Maybe.
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    Half round bastard file with some heavy Emery tape.

  15. #15
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    Quote Originally Posted by Kickaha View Post
    We used to use some type of acid which took the alloy off with out harming the Nikasil
    using the old sort of green solder flux works on iron bores not sure re Plated ones.
    I can even find what it was called it was a green squezy one with ribs on the side.


    Quote Originally Posted by sidecar bob View Post
    I use that partly to prove if there's alloy still on the bore. It foams the alloy up White & leaves the bore alone, if it foams, I keep cleaning it.
    that one with the flux came from something you posted?



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