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question: Bolt through pvc

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question: Bolt through pvc

Unread postAuthor: psycix » Thu Jun 28, 2007 5:55 am

Hi,

I just assembled my first real combustion spud and i have a question.
It may be a stupid question but it worries me much.

How do I get a bolt through my pvc so its in the chamer without making a leak? They will be used as electrodes for the igniter or contact points for chamber fan.

Can I just drill a hole thas a bit smaller so it is in very tight?



It worries me much and Im not going to drill before im sure that im not ruining my chamber.....
Leaking at the bolts caused the breakdown of my first (ghetto) gun, since the hot air slipping through melted it all.
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Unread postAuthor: homedepotpro » Thu Jun 28, 2007 6:11 am

yeah just drill holes so the bolts fit tight. You don't need to worry about a leak like that in a combustion gun. You could cover the outside of the bolts with epoxy or even hot glue, mostly just to protect you from the electrodes and to stop any tiny leaks. The pressure is only in the chamber for a split second, it really doesn't matter.
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Unread postAuthor: psycix » Thu Jun 28, 2007 6:13 am

if you say so.....
but i think ill be putting a small rubber ring on it to be sure :)
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Unread postAuthor: Marco321 » Thu Jun 28, 2007 6:18 am

Hey
What i did on my combustion was place epoxy glue inside the chamber over the bolt, and outside the chamber over the bolt. This would prevent any leaks, shocks from the electrode (myne was ~500V) and the epoxy on both sides will prevent the nail from comming loose.
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Unread postAuthor: fpshutch74 » Thu Jun 28, 2007 11:49 am

you can use a silicon sealant... there are tons of types and you probably already have some lyin around in the basement
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Unread postAuthor: lukemc » Thu Jun 28, 2007 12:24 pm

if your realy worried buy a tap and thread the hole. but what i do because im too lazy to get the tap out is i drill a hole slightly under size then tighten the bolt in the drill and just screw it in
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Unread postAuthor: SpudBlaster15 » Thu Jun 28, 2007 12:25 pm

Buy a tap set, and you will never have leaky threads.
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Unread postAuthor: lukemc » Thu Jun 28, 2007 12:41 pm

SpudBlaster15 wrote:Buy a tap set, and you will never have leaky threads.


unless you cross thread it wich it suprisingly easy to do with pvc...... somethimes i hate speaking from experiance
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Unread postAuthor: psycix » Thu Jun 28, 2007 1:11 pm

ok I just drilled tight holes and screwed them in
they didnt go in well so they are in very very tight :)

But thanks for the answer guys! :D
It will do this way.
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Unread postAuthor: iPaintball » Thu Jun 28, 2007 1:26 pm

It you want it to be air tight, drill a hole slightly smaller than the bolt, screw the bolt in then take it out, than wrap the first 1/4" of the bolt (under the head) with teflon tape.
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Unread postAuthor: jimmy101 » Fri Jun 29, 2007 1:39 pm

You really don't need to use teflon tape.

What do you think psycix, what are the chances that your "ghetto taps" are going to leak?

I would say pretty much zero. Ghetto taps works very well for small screws in combustion guns.

For a compressed air gun you might get minor leaks from ghetto taps. Teflon tape, or epoxy, or any other kind of sealant might help in that case.
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