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Old 03-06-2010, 04:21 PM   #1
Knows a couple things...

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Exclamation Death by tire pyrolysis

Watch this amazing video from Bridgestone. It's possible that a tire & wheel can blow from just a little heat on the wheel from welding, torch, etc. with devastating results.

Bridgestone Tire pyrolysis video

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Old 03-06-2010, 04:31 PM   #2
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Wow. I'm always worried when I mount truck tires. STuff is crazy!

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Old 03-06-2010, 04:49 PM   #3
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One of the reasons that tire shops have safety cages, for "airing up" truck tires with safety rings !!

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Old 03-06-2010, 05:04 PM   #4
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Interesting...I had to keep the volume low since my roommate is trying to sleep and I don't wanna wake him up, but is that basically saying that just a quick weld will make it heat up even after you've completed welding...like the heat is being dissipated from the rim to the air in the tire over the course of a few minutes?

Something else I want to touch on...I get lots of flat tires at work, especially in our John Deere Gator which I put through hell and back. Sometimes I can't get the beads to reseat and it was suggested to me to spray a small amount of starter fluid inside the tire and then light it and it would "magically" seat the beads.

Here's what I'm talking about...I'm sure many of you have heard of this 'trick'


Now I know the risk of lighting starter fluid...that stuff is crazy flammable so when I did this, I sprayed a small amount in the tire, attached a piece of a rag to the end of a 3-4' long rod and held it near the rim until the fumes ignited.

I will never again try this little trick...I got lucky. When this ignited, my eyes briefly blacked out and my ears were ringing...it sounded like a pipe bomb had just exploded in my face. It was so loud the dog at the neigbor's nearly a quarter of a mile away was going NUTS barking like crazy.

If that tire has ANY weak spots in it...instead of pressurizing and seating on the rim, it very well may just blow out the weak spot. In my case, it blew out a patch and a hole large enough I could probably stick my entire lower arm through. If you can't get the beads to seat...take your tires to a professional!

Here's what the John Deere Gator tire looked like in the end...I'm just glad I was smart enough to use a rod for lighting it or I'm afraid I may have lost a limb.

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Old 03-06-2010, 05:14 PM   #5
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Thaty is a handy system for use off-road, BUT

It's like usinfg a HiLift jack--some care and judgement must be used

When a bead is blown like that one, you have to inspect the tire for other damages then, you have to wipe the bead/rim CLEAN, sometimes both sides-

All it takes is a fraction of a second burst of the (I use "Thrust"), then leave it for at least 5 seconds then -standing back--throw match-BAM, it works

You don't have to SPRAY AROUND THE RIM, just a short burst at the top

I've done it in the rocks/snow, but not the mud, I imagine that would be a little tougher--

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Old 03-06-2010, 05:27 PM   #6
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When I did it, I did similar to you described...very short burst. But apparently enough to make the tire go kaboom. lol

Edit: Mind you...the video above in my post, is not mine. Just a successful example. The photo is an example of where things can go very wrong.
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Old 03-07-2010, 12:25 PM   #7
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One key step of that trick that they often leave out is that you need to remove the poppet valve from the valve stem. That provides a bit of a pressure release. Still, not a good plan......
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Old 03-07-2010, 12:44 PM   #8
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Sorry, can't agree with that idea, I've never done it and that would defeat the purpose of the igniter


Quote:
Originally Posted by Unlimited View Post
One key step of that trick that they often leave out is that you need to remove the poppet valve from the valve stem. That provides a bit of a pressure release. Still, not a good plan......
When the igniter "spontaneously "ignites", it creats a momentary vacuum in the tire and the inrush of ambient airpressure, reseats the bead--by removing the valve stem, you'd get no vacuum and no instantaneous pressure to reseat the bead !!!

If you've done it the way you describe--congradulations

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