not as title suggests, but close..

I need to remove the ceramic insides from an old spark plug.. to make use of it for something else, and an old plug seems ideal.

I've pulled the electrode out of the center, so I do have a small hole down the middle..

I was thinking along the lines of hammering a tappered punch down the hole until it all shatters the ceramic..

any other ideas..


tak

[Edited on 25-5-07 by takumi]

masonry tipped drill bit ?

dont pikies use the stuff to break car windows ?

How about using an old skool tdc gauge? - pretty close to a spark plug with a hole down the middle.

nip it in a vice [the white bit ] AND MIND YOUR EYES

ive snapped the nose off and the electrode tip, but cant work out how easily to crack the main bulk of it in the center..

quote:

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Originally posted by graememk
dont pikies use the stuff to break car windows ?

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Will a spark plug extension work for your intended application???

Its not for breaking into cars, -I've been a victim and it isn't the most favourite thing I want to happen to me again..

-it's to repair the base of an up-lighter has fallen apart..

[Edited on 25-5-07 by takumi]

The ceramic is held in by the outer steel shell of the plug being crimped over. Cut through this in line with the top edge of the hex and the ceramic will fall out if you tap it from the combustion chamber end.

As BT says just cut above the hexagon and all the ceramic will drop out. Have done loads in the past to make adaptors to pressurise cylinders and to make head stands.