OT Hollow Out A Spark Plug

Kendog · Feb 10, 2011

I'd like to drive, or drill, etc., the electrode out, keeping the threaded base and porcelain upper attached.

Has anybody done this successfully and willing to share the technique? I've seen photos so I know it can be done. Thank you.

teddy52food · Feb 10, 2011

I guess if you bend the ground strap out of the way & get it centered in the lathe, it could be done. But why may I ask?

sflem849 · Feb 10, 2011

A lot of guys do it to use them as sand blasting tips.

I think the older style Champions work best. I believe the stuff I read on the net said to tap on them from the top (where the wires hook up) Just clamp the hex part in the vice and drive the electrode out.

Kendog · Feb 10, 2011

Yes, sandblasting tips.

But 'just' driving it out is easier said than done.

Dave_Id · Feb 10, 2011

I took a couple of plugs, drilled and tapped them for 1/2-13 I-bolt and use them to lift flat head motors.

Another great use for discarded plugs.

couv · Feb 10, 2011

Used to keep a hollowed out plug with a length of clear tubing jammed in it in a Datsun 610 during my poor college days.

That way, when it would jump out of time, I would put it in the #1 hole, fill the cylinder with motor oil, turn it by hand until #1 was on TDC (by watching the oil rise the lower).

Did it on the side of the interstate one time, and kept on truckin!

62champ · Feb 10, 2011

My uncle had a hollowed out spark plug with a zert fitting brazed on the end to break loose stuck motors - a grease gun can put a lot of pressure inside a cylinder...

charles todd · Feb 10, 2011

I'll remember this tip!

Thanks,
CT

rustyfarmall · Feb 11, 2011

(quoted from post at 19:38:20 02/10/11) My uncle had a hollowed out spark plug with a zert fitting brazed on the end to break loose stuck motors - a grease gun can put a lot of pressure inside a cylinder...

I've got one with a hydraulic hose fitting attached.

Roger46 · Feb 11, 2011

I recently decided to put umbrella seals on my Farmall A since it was smoking a lot at idle. I took an old spark plug and knocked the center out, broke off the side electrode, and discovered that the ID of the plug shell was the exact size for a 1/4" pipe tap. I just ran the tap in, screwed a 1/4" pipe, and a quick disconnect. Then I screwed that into the head of my A and put air pressure on it to hold the valves closed while I took the keepers out of the valves to put in the seals. It worked real well. Roger

farmerjohninpa · Feb 12, 2011

looking at the plug,,follow down the porcelan of the plug to where it enters into the steel,,,here you will see the steel begin, you will notice it is a radius,,that radius is a "roll=crimp" that is rolled by machine and seals the porcelan into the steel part of the plug.a lathe is great for cuting this radius off to make adapters out of plugs,,,at worst, a drill press with a 3/4 inch chuck will hold the plug and using a hand grinder or die grinder you can grind the radius away as the grinder takes the radius off-"not advisable to do as for safety concerns,,but i have using safety gear and care and skill"

OT Hollow Out A Spark Plug

Kendog

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teddy52food

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sflem849

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Kendog

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Dave_Id

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couv

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62champ

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charles todd

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rustyfarmall

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Roger46

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farmerjohninpa

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