MOPED ARMY

That is awesome

wow, pure genius.

Good shit man, another thing I can mess with over winter break. yay.

lol everyone is thinking the same. i made one sort of like this wif a hex cap bolt in a extended reach spark plug from a lexus so that the nose of the tool is way too long. that way you can put the motor to tdc and bottom the plug on the top of the piston. turn the motor backwards a quarter turn, thread the plug in 1 1/2 turns, then turn the motor forward until the piston touches the tool. that is 2mm.

i used the lexus plug because it is long reach and it has a 5/8 hex head so it is real easy to get a socket on it.

also instead of smashing the crap out of the porcelin which is sometimes real tough, just cut with a hacksaw above the hex on the rounded shoulder and the porceline just slides out with a little knock on the center electrode. also make sure you file where you snap off the side electrode because it can become a thread ruiner otherwise.

Wari gave me another thought here to make this a dual-purpose tool. If you get another (slightly longer) bolt threaded all the way down, you could shave down the head as Terry did, along with a rounding off a nut. Put the nut on the bolt and slip it into the plug from the engine side - put another nut on the top - and voila! You can use it as a piston stop as well. Then just swap out the bolts when you want to use it for timing purposes.

steve read what i wrote n look at the attach picky

_also instead of smashing the crap out of the porcelin which is sometimes real tough, just cut with a hacksaw above the hex on the rounded shoulder and the porceline just slides out with a little knock on the center electrode_

you can do it like this Bert or just replace the spring with a 1/4 " pipe and cut it to about say 25 mm, there is your piston stop.. Personally I don't like piston stops...too much change to fuck up the piston. steel bold vs. aluminum piston....guess who the winner is ?

The rope trick never failed me !!

Mike

Bert,

First I break out as much of the porcelean as I can with a Channel Lock plier or a hammer or a vice grip plier. Then I chuck it up in my lathe and run a high speed drill bit into it untill it goes all the way through. I have done it in a drill press andit is possible to do it in a vice and use a hand held drill motor.

Any way you do it the porcelean is HARD and can be a bugger to drill out. Use a sharp drill bit and stop every few minutes and re-sharpen it.

I like to do it in the lathe because that way it is quick and easy... I can use lots of force and make lots of chips!

If you don't have a lathe, a mill, a drill press or a drill motor and vice then just get a friend with tools to blast one out for you... be sure to take him (/her) a beer or soda to show your appreciation!

Terry

crack heads do this all the time in SF without the aid of tools, many bikes lose thier sparkplugs locked over night, ur lucky if the fins are in good shape too.

busted sparkplugs make good crack pipes apperently

neat stuff tho

try this agn

sorry its a puch pinto

a buddy of mine from texas said that there was a whole rash of car robberies in houston in the 80's, when people figured out how to get the porcelain out of spark plugs with out breaking it. then what you've got is something that will shatter at JUST slightly greater force than you need to break the side windshield on a car . . . combine such a projectile with a slingshot, and you can break a car window with very, very little noise. sort of a handy thing to know how to do ;-)

i just bought one that has a micrometer type end. .1mm markings.

k

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