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post #1 of (permalink) Old 06-13-2000, 02:05 PM Thread Starter
 
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Patching a torn sidewall

In a short spell of impatience I pinched my BFG MT sidewall between the wheel and a chunk of granite. [img]/wwwthreads_images/icons/mad.gif[/img] The tire lost that battle. There is a simicircle cut about the size of a quarter.
My question is... has anyone got a method of patching that will hold up to trail use. No shops here want to touch it due to liability reasons. My jeep sees very little street use.
Ideally if I can find a used replacement I will use this tire for a trail spare only.
Hate to throw out a tire that still has plenty of tread on it.[img]/wwwthreads_images/icons/frown.gif[/img]

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post #2 of (permalink) Old 06-13-2000, 02:20 PM
 
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Re: Patching a torn sidewall

I patched a radial tire with a larger cut than this and used it for street use for another 3 months. Here's how it was patched. Get a tire patch kit from Walmart. It should come with a large tube of glue and assosrted size patches. Take the tire off the rim, clean the area around the cut, and glue on the smallest patch that will cover the hole, then spread glue all over that patch and around it and put on the next largest patch. Repeat the process until you've run out of patches and then smother it all with the rest of the glue.

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post #3 of (permalink) Old 06-13-2000, 02:39 PM Thread Starter
 
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Re: Patching a torn sidewall

That's kinda what I was thinkin' about.
Was wondering though, if anyone has any inputs about the self vulcanizing hot patches.
I know we used to use these quite often on our dirt bikes when I was young.
Haven't seen them though in a long time.
Maybe that stuff that burned to heat them was some sort of carcinogen or something.

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post #4 of (permalink) Old 06-13-2000, 04:43 PM
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Re: Patching a torn sidewall

i've got a question. I cut my brand new 35 ss tsl. looks like I spun the wheel while under water cutting a complete circle in the side wall. Now this cut is about 1/4" deep all the way around on an angle. It did not however pop the tire, but I am definetely worried about reliability. I don't want to even drive it on the road. Do they make any kind of glue to repair this? Any help would be appreciated

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post #5 of (permalink) Old 06-13-2000, 05:05 PM
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Re: Patching a torn sidewall

I dont know exactly what it is called,but around here some shops can patch a sidewall cut thru,they use a large "patch" that is heated and molded right into the tire rubber then ground down flush,i i have had ATV tires and truck tires with this type patch and never had any to come apart,and the patch was actually thicker and more solid than the original sidewall.The patch was on the outside or tire.Maybe check with shops specializing in farm tires or heavy equipment tires,etc.

post #6 of (permalink) Old 06-13-2000, 07:58 PM
 
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Re: Patching a torn sidewall

The Walmart idea might work untill you try to drive the tires aured down then the flexing will break the bond and ruin your repair. I have heard about the tire sidewall vulcanizing, but i believe it is on the same lines as St Elmos Fire or the lost City of Atlantis. Every truck tire shop i called would not deal with that type of repai even if I told them it was only being used on an off road rig ONLY. I have finally gone to just putting a tube inside of them, theydont air down as well but still work OK at 10PSI. I always carry a spare tube on the YJ nowadays. Tubes are about $35 to $50 for a 35x12.50 15.

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post #7 of (permalink) Old 06-14-2000, 12:27 AM
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Re: Patching a torn sidewall

carrying a boot is always a good idea. as far as patching the sidewall, go to a shop that works with heavy truck tires and see if they will do a plug for you. they will basically cut the offending area out of the tire and vulcanize a new plug of rubber in its place. but you will not be able to air the tire down like you used to as the plug will break down over time due to the lack of cords attaching it to the rest of the tire, but it will be good enough for a spare.

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post #8 of (permalink) Old 06-14-2000, 01:16 PM
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Re: Patching a torn sidewall

I posted this awhile ago, you might also try a search on the subject.

I patched a bias ply swamper on the sidewall. My swampers are 8 ply, and I have indavertently run them flat on trails, but they still look like they have air in them due to the stiff sidewalls. In fact, they're flat now, but they look like they have 20 psi of air in them, of course, there's no body on, so little weight.

I bought a set of 33" TSL's from a friend that totalled his jeep (ran OVER a Subaru, pics to be shown later). All of the tires had nice tread, but on closer inspection, one of them had a puncture on the sidewall, that was perpendicular to the rim and went to the bead (2" long). Not only to the bead, but once it hit it, it traveled along the bead, both directions, about 1 inch, looked like a triangle. I took it everywhere and everyone told me it was junk, wouldn't touch it for liability reasons. Since I had nothing to loose, I decided to experiment.

I got some 2 ply patches and glue from NAPA and went to work. I patched the inside and outside, scuffing the rubber, cleaning, and adhering the patch. No-go. Nothing held. So I mentioned this to my dad one day and he had a suggestion. He said he used to manage a tire shop in Mass when he was younger (40 years ago), and they patched all sorts of stuff. He said the key is a good glue and to scuff the tire really well to give the patch something to adhere to. I retried it, this time I bought NAPA's will-stick-to-anything tire cement and more 2 ply patches (4"x4"). I scuffed the inside and outside of the swamper using a 4.5" grinder (that worked well!) and walked the cleaner, then glue to it. I put a patch inside and out, tried to find an inner tube but couldn't. I sealed the tire to the rim with sealant and gave it a whirl. It held air!

I ran the tire for a year (almost exclusively off-road, but some road driving to the trails) and even aired it down to 4psi, which is what I wheel at. I have beaten the rims against rocks and they're pretty warped now. The outer patch is coming off, but it still holds air. In fact, many of the others don't anymore, they'll go flat in a week. I typically run the tire on the passengers rear due to less weight and a cop won't notice when I get stopped.

Give it a try, can't hurt. Good luck!

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post #9 of (permalink) Old 06-14-2000, 01:30 PM Thread Starter
 
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Re: Patching a torn sidewall

Thanks!
I'm headed to my local NAPA as soon as I get loose from here.

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post #10 of (permalink) Old 06-14-2000, 06:35 PM
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Re: Patching a torn sidewall

good idea, but what about a slice around the whole tire. Do you guys think that a good rubber cement will hold it? The tire still holds air now, just has that 1/4" slice all the way around the side wall.

Keith

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