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SkyMan

Weird tire issue. Repair?

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SkyMan

The rear tires on my lawn mower have had slow leaks for quite a while.  I think they're like 8 inch rims.  For a couple years now the right rear has had to be pumped even if I mowed 2 weeks before so I pump both the tires.  The fronts are smaller and need air maybe every 1.5 years.  I took the wheel off when this started and took it to a vulcanizer who said there was no leak.  So since then I've been doubling the pressure to 20 psi and sometimes I can get a second mow in without pumping.  Today I decided to end this and had plugs at the ready.  I took the wheel off and pumped it to 20 psi.  Then took it to a drum of water and washed it off, then submerged it and looked and looked.  I looked for any general bubbles, then closely at the valve, dust cap off. wiggled the valve, nothing.  I concentrated on the bead but nothing.  I was determined to find it but no luck.  It seriously took maybe 20 minutes minutes for the water to settle enough before I noticed the tiniest stream of micro bubbles seeping from a point about an inch from the bead on the inside of the tire.  Aha, there it is.  But wait, there's another, and another.  It seems there's a line of them around the tire about the same distance from the bead.  I can't plug that.  Some error in the manufacturing process perhaps?  Designed obsolescence?  Maybe the left tire has the same problem as I haven't checked it yet.  So now, how to repair it?  I'm thinking maybe have the vulcanizer pop that side out, And then slather some rugby on there and refill it.  I wonder if it would be better to also glue on some strips of inner tube?  I'd rather not go to a tube because I can plug a tubeless at home if need be and I'd have to remove the valve and replace if when I get a new tire.   

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Woolf
SkyMan
38 minutes ago, Woolf said:

Yeah, I was looking for Slime a while back and found it very expensive.  This off brand stuff may be the same but cheaper.

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Jester

I had an air bag leak,  could not find the leak.  Pump it up and it would sit for weeks and not lose air.  Drive a few miles and it would slowly lose air.  Would only leak when moving!   Had to replace the bag, sealants would not work.

Front tire on my mower keep going flat,  slimed it, put in inner tube,   finally threw in the towel and put solid tires on it.

Edited by Jester

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Dafey
2 hours ago, Jester said:

I had an air bag leak,  could not find the leak.  Pump it up and it would sit for weeks and not lose air.  Drive a few miles and it would slowly lose air.

You inflate your airbags while driving? I guess you're ready for that collision....?

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HeyMike
24 minutes ago, Dafey said:

You inflate your airbags while driving? I guess you're ready for that collision....?

 

Lol... got me wondering also.

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cookie47

By your description the fault is very much consistent with age cracks.
Also tyres sitting flat for some time will suffer this same fate.
Not saying they have, only possible opinion.
Has the tyres production dates. If more than 7 years there out of date. (of coarse this relates to passenger vehicles but I know it's not)

A vehicle "of any description" will suffer this problem if left sitting in the sun. (which is not too hard in the Philippines)

Another cause, particularly cars is driving with low pressure.

Yes slime and the like products do work, but if was me I'd put a tube in it. I understand your sentiment that "next time" you would have to dismantle to fix a flat but that's me.

Only ideas, a picture will help.



Sent from my MI MAX using Tapatalk

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bert

yes in aussie i tried that #hit  would not get you to available compressor  i really liked the plug  Tyre fitting  take out 1 plug and inflate tyre and go

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SkyMan
1 hour ago, cookie47 said:

By your description the fault is very much consistent with age cracks.

But you can usually see age cracks.  In this case it's a single line around the tire about 3/4 inch from the rim and there's an indention there like the edge of some material inside the sidewall stopped at that point.  I have the slime stuff Woolf recommended on the way,  Worst case I have to keep pumping it before each mow until I replace the tire(s).

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fred42

 

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Jester

The caulk and foam fix is ok for a bit on a mower, but will not last for extended periods.  Not even worth trying on a car or motor cycle.

May be some specialty foams for tires available but I have never seen them. 

https://www.youtube.com/watch?v=arz7JB8t8K4

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cookie47

Another issue which I failed to mention is "porocity", which is another age related fault caused by UV damage. Often not visible until until water tested. 

 

And whilst I'm on the subject of tyres. (if I may)... 

Be very careful of Tyre (tire) plugs. 

Whilst I've used heaps of them over the years "mainly" as a get you home device the strait "dog turd" types have been proved dangerous and subsequently have stricked fitting guidelines in Australia and Profesional Tyre fitter are reluctant to use them. This was once thought as a money making effort to sell a new Tyre "and possibly was in part). But consumer law stepped in when it was proved that Tyre plugs were the cause of fatal accidents. 

There is a much later design called the mushroom plug that can be fitted "externally" see YouTube...... 

Plugs can only legally be fitted to within 25mm "(one inch") of the tread face where it meets the wall and never in a side wall. 

And that's after the Tyre has been dismounted and inspected for further damage which is often not visible. 

This all might sound "over the top" but it is well documented that tire plugs are dangerous and would you put your family in a car @100kph (62 mph) with Tyre plugs.

Its also might surprise some people that putting a tube in a tubeless Tyre is bad practice as it will overheat,, as tubeless tyres have a rough inner coating, tubed tyres don't... 

I know this is somewhat unrelated to Skyman questions but tyres are an art form and need to be understood. 

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SkyMan

Good info on plugs and I'm aware of the danger.  I have one in my Ranger right rear right now, between the treads. I don't get up near 60mph very often.  62kph is even infrequent.  I wouldn't use one on my bike or in a sidewall. 

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fred42
Quote

The caulk and foam fix is ok for a bit on a mower, but will not last for extended periods. 


Agree about for mowers only.
Do you mean the foam will degrade?
I suppose the tire it`s self could have a re cap if the tread is gone.. Could last forever!!

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Paddy
8 hours ago, cookie47 said:

(62 mph)

I’m lucky if I get over 60KPH here in Masbate!

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cookie47

Yes thats true Paddy, I was writing in generic mode. It funny how you get used to the generally slow speeds of PH. 

I remarked in a taxi to my wife the other day, gee were going at a rate. I looked across at the speedo and it was only 65ks.

(mind you it didn't last long).. 

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SkyMan

Yeah, I risk a blow out with loss of control and end up splattered against a wall but at a top speed of maybe 5kph I'll risk it.  Might scalp part of the lawn though. Wouldn't be the first time.  :rolleyes:

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Paddy
5 hours ago, SkyMan said:

Might scalp part of the lawn though

I wish it was lawn I was scalping. Every time they do new bridges in Masbate it seems I end up driving on very uneven dirt (rock filled) ramps. The number of times there has been a nasty scraping sound from underneath the car doesn’t bear thinking about!!

Public works here seem to think that every 4+ wheel vehicle is the same when it comes to ground clearance (ie., roughly equivalent to a 10ton dump truck!)

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Jester
On 5/29/2019 at 12:13 AM, fred42 said:


Agree about for mowers only.
Do you mean the foam will degrade?
I suppose the tire it`s self could have a re cap if the tread is gone.. Could last forever!!

Caulk and foam is not structural will not carry much weight and brake down rather quickly.   Also needs air and moisture to cure, does not cure well in enclosed spaces.

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to_dave007
3 hours ago, Paddy said:

I wish it was lawn I was scalping. Every time they do new bridges in Masbate it seems I end up driving on very uneven dirt (rock filled) ramps. The number of times there has been a nasty scraping sound from underneath the car doesn’t bear thinking about!!

Public works here seem to think that every 4+ wheel vehicle is the same when it comes to ground clearance (ie., roughly equivalent to a 10ton dump truck!)

It gets worse..  Was waiting my turn to pass a very rough one way section during some construction north of Tabuelan Cebu when a convoy of hot little race cars came the other way..  all VERY low to the ground.. took then damn near 30 minutes to get em all through the rough spot.

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Paddy
14 hours ago, to_dave007 said:

It gets worse..  Was waiting my turn to pass a very rough one way section during some construction north of Tabuelan Cebu when a convoy of hot little race cars came the other way..  all VERY low to the ground.. took then damn near 30 minutes to get em all through the rough spot.

If I slow right down so a) i can see exactly which holes I'm going to hit and which I will miss and b) not scrape 'much" of the car, i will likely be rear-ended and/or passed (both sides) by motor cycles and or tricycles - and the odd 4 wheel vehicle too!

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SkyMan
On 5/28/2019 at 9:52 PM, SkyMan said:

I have the slime stuff Woolf recommended on the way,  Worst case I have to keep pumping it before each mow until I replace the tire(s).

So I ordered the ZZ Racing tire sealant on Lazada from a seller in NCR on 28 May. Lazada is pretty fast and coming from NCR as opposed to China I figured less than a week for sure. Just got here this evening.  Some how it got handed over to some new delivery service, Entrego. Not a good first impression for me. I'll try it out tomorrow but I'm not getting a good feeling about it. The instructions say after squirting the stuff in the valve stem I need to..... "Clear the air inlet of the wreckage"  WTFO?

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SkyMan

So  it seems to be working on the lawn mower tires.  After putting it in on June 15th I mowed the lawn and then mowed again yesterday without having to air the tires first.  So today I decided to put it in the rear tire of my bike but no success yet.  The valve stems on my bike have a much smaller opening below the valve.  When I try to add the sealant, a little goes in but then no more and I can't even get air in.  Seems the sealant is actually sealing the core.  I have to use a drill bit in my fingers to open the core back up.  Tomorrow I'll take the wheel off and go down to vulcanizer to just break the bead and spray the sealant in the hard way.  There's too much tread left on that tire (p14K ea) to change it out yet.

Edited by SkyMan

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