At what point do you replace the brake pads and discs?

 

How much play does there need to be in the suspension components before you replace them?

 

How close to the legal limit do you run your tyres?

 

What is the minimum amount of sleep you'll ensure you get before driving?

 

How many adjustments of the heating and ventilation and/or infotainment system do you allow per journey?

 

There are many, many more likely contributors to a head-on collision than a sealed / air tight puncture to worry about.

Quote

Imagine the horror of someone driving more than the recommended 50 miles on a punctured run-flat tyre, will someone think of the children!

 

Probably not, and that's how accidents happen - because many people are ignorant or don't care enough - until the unthinkable happens.

I absolutely agree with all the possible scenarios you outlined above, there's some absolute ******* on the road who care not a jot about what mayhem and carnage their actions could instigate.

We do take our lives in our hands every time we venture out onto the roads, and most likely an accident will be caused by one of those above, so why possibly add to those statistics by baulking at the cost of a proper repair or a new tyre. 

And yes, I do understand the reticence of replacing what looks like a perfectly good tyre with plenty of tread left on it, but sometimes the bullet is worth biting.

And will the people who are blasé and won't spend the money to keep their car in a safe running order feel the same when they kill or maim someone ?

And yes, I am calm, I just believe in pointing out the folly of peoples ways before it's too late.

Wait until you're being helicoptered to hospital because some other inconsiderate basket  just didn't consider the consequences of his actions beforehand, so yes, I do have quite strong feelings about such things !!

3 minutes ago, silver1011 said:

At what point do you replace the brake pads and discs?

 

How much play does there need to be in the suspension components before you replace them?

 

How close to the legal limit do you run your tyres?

 

What is the minimum amount of sleep you'll ensure you get before driving?

 

How many adjustments of the heating and ventilation and/or infotainment system do you allow per journey?

 

There are many, many more likely contributors to a head-on collision than a sealed / air tight puncture to worry about.

 

You're asking the wrong person those questions, I've told you before that I have a condition, and a part of that condition is that I always try and do things properly. So if any of the things you've mentioned above needed doing, then I would do them. And I do not fiddle with settings anymore than is absolutely necessary, and if my wife is with me, she'll do some of it.

I don't always get everything right but I do try, which is more than some do.

58 minutes ago, olderman1 said:

 

I agree my remark was extreme but shock tactics are better than no tactics at all. You assume the tyre will deflate, and slowly hopefully, but how do you know, so why take a chance ?

 

Because the worst that can happen is the hole can reopen and let the tyre deflate. A blow out requires a catastrophic failure of the tyre, so something else needs to happen to cause that - like a side wall getting ripped by something, or perished rubber failing under load, or a tyre overheating after driving at speed whilst under inflated - all unrelated to a bit of sealant coming loose. 

 

I don’t find shock tactics add much value to a discussion other than to highlight that the underlying argument perhaps has a weak basis. A good point well made doesn’t need a shock for backup.

 

For what it’s worth I’ve had a puncture whilst driving at 60mph on an A road and it was spectacularly undramatic. We noticed a funny noise coming from the rear, the car started riding differently, and I slowed to stop.  Then I changed the wheel. On a Kodiaq the warning system would likely go off way before any of that happened. Blow outs are very different to punctures.  

52 minutes ago, olderman1 said:

Probably not, and that's how accidents happen - because many people are ignorant or don't care enough - until the unthinkable happens.

 

Nothing is more important to me that the safety of those in my vehicle, and those around me.

 

Yet, I would happily continue to drive on a tyre with a sealed puncture, much in the same way I allow myself to be distracted by the myriad of controls inside the vehicle.

 

It is down to an individuals perception of risk, and the possible consequences of how that risk is managed.

 

If I thought my chances of a collision were increased by driving on a self-sealed tyre I would change it. I don't so wouldn't.

 

Each to their own.

You make many assumptions, which is your prerogative, so lets hope that the next time you have a puncture, the scenario plays out the same as the last time i.e. the deflation is slow, your warning system is working correctly and/or you recognise the symptoms.

That's almost ideal in that situation, but accidents/bad things don't happen because of ideal circumstances, they happen because something goes wrong or there's human error.

Shock tactics do work, I can assure you.

6 minutes ago, olderman1 said:

Shock tactics do work, I can assure you.

 

Only when used appropriately.

 

If shock tactics were used all of the time then their impact / effectiveness would be reduced.

47 minutes ago, olderman1 said:

You make many assumptions.

Shock tactics do work, I can assure you.

 

As do you, so a bit off for you to criticise others for making them. You’re assuming that if the sealant comes loose, the hole is going to enlarge enough to cause a catastrophic failure of the tyre severe enough for you to lose control of the car. I do not share that assumption. 

 

Shock tactics work very well for politicians looking to persuade the ignorant to believe an argument they have little evidence for. Evidence and facts persuade me. Shock tactics get treated with the contempt they deserve. 

Edited 9 July, 20196 yr by MrTrilby

I'm taking the logic a step further:

 

The designers of the self-seal tyres (say, Pirelli) are not stupid.  They know that the tyres may get pierced, eg by a nail.  And that the piercing will then self-seal.

 

But surely they must also know that the piercing could be by, say, a nail sticking out of a chunk of wood, which was still in the wood as the car drove off.

The piercing will self-seal ... but the driver will know nothing about it.

 

This will be a rarer occurrence than the cases where the nail, etc, is still visible in the car, but not so rare that it can be ignored (presumably something similar happens with broken glass, or oddly-shaped sharp bits of metal).  So, if the designers are expecting this to happen sometimes, and are happy that the driver continues, in blissful ignorance, without going for a tyre repair, then they must be happy for the original poster to do the same, no?

 

 

Edited 9 July, 20196 yr by DaveMiller

With the pirelli self seal tyres there is a 15mm thick sticky layer inside the tyre underneath the tread.

If you get a puncture from a nail/screw the puncture still needs to be repaired.

 

Although the self seal can/will still hold the air in, another problem still exists.

The hole in the tread can let water in which will rot/rust the fabric/wire underneath the tread.

 

Eventually the tyre will fail, but only when the tyre is under high loads.

Like when you are driving fast, going round a corner and or braking hard.

 

They can be repaired by removing the self seal layer around the puncture hole.

They will not prevent a puncture in the sidewall as there is no self seal layer there.

 

HTH

 

Thanks AG Falco

Surely the sealant that seals the hole and prevents the air from escaping, also seals the hole and prevents water from getting in?

1 hour ago, silver1011 said:

Surely the sealant that seals the hole and prevents the air from escaping, also seals the hole and prevents water from getting in?

 

And ... if the hole did open momentarily as the tyre flexed, or something, the air pressure would win, pushing the water out.

22 hours ago, silver1011 said:

Surely the sealant that seals the hole and prevents the air from escaping, also seals the hole and prevents water from getting in?

 

21 hours ago, DaveMiller said:

And ... if the hole did open momentarily as the tyre flexed, or something, the air pressure would win, pushing the water out.

 

The self seal layer is not a liquid it is a sticky solid. I am thinking of a layer of very sticky black marshmallow.

 

 

 

Thanks AG Falco

15 minutes ago, AGFalco said:

 

 

The self seal layer is not a liquid it is a sticky solid. I am thinking of a layer of very sticky black marshmallow.

 

 

 

Thanks AG Falco

 

And what difference does that make to the idea of water getting in, while air can’t get out?

 

15 minutes ago, DaveMiller said:

And what difference does that make to the idea of water getting in, while air can’t get out?

 

If the tyre had a puncture because it had nail/screw going through the tread you remove the nail/screw.

If you leave it in the hole gets bigger/worse as it is driven on and it squirms around.

 

After you have removed the nail/screw there is still a hole from the outside.

This goes through the tread, in to the carcase with the wire/fabric in it.

Going deeper you then have more carcass then the butyl liner.

 

After this, you then have the self seal layer which will not travel back up the hole left by the nail/screw.

So the self seal layer inside the tyre will not plug the hole in the tread on the outside.

 

Any wire/cords/fabric showing on a tyre at an MOT test is a fail.

 

HTH.

 

Thanks AG Falco

 

Edited 10 July, 20196 yr by AGFalco
added full stop.

Is it on the front or back tyre ? 

Why will the hole get bigger/worse? Why will the sealant not plug the hole?

 

What you describe is not my experience of how sealant works. Are you guessing what happens or do you have actual knowledge of the way these tyres work?

 

19 hours ago, MrTrilby said:

not my experience of how sealant works

 

The Pirelli self seal is not a liquid. I have taken this from Pirelli:-

 

'' In the event of a puncture, the sealant allows the driver to continue driving – not having to stop the vehicle for an immediate replacement of the tyre – until it can be replaced. The sealant does not guarantee permanent repair of the tyre caused by a puncture. ''

 

If you want to look at BS AU 159 for puncture repairs you will find the only permanent approved method is with a combination plug/patch flat mushroom repair.

 

19 hours ago, MrTrilby said:

Are you guessing what happens or do you have actual knowledge of the way these tyres work?

 

I only see about 2000 tyres a month. 😉

 

HTH

 

Thanks AG Falco

I have personally let 2 punctures self seal and left at that. Both tyres ran down until replaced by wear for well over 18 months. One screw and one nail. Would leave alone and just get on with it. If pressure does drop then fix.

If there is a hole where you can see wire or cords then this is still an MOT fail / tyre defect.

 

Yo can get these tyre repaired to  BS AU 159.

 

Thanks AG Falco

One point everyone seems to have missed.  As you have not sought expert advice on removing the screw, and if you then have an accident because no proper repair was done, then your insurance company will not cover you.  I would have gone to a garage as soon as possible and got this evaluated correctly.

4 hours ago, Stu_Magoo said:

then your insurance company will not cover you.

 

They will cover you.

 

But they 'might' look at you to pay any NON third party costs they incur.

 

 

4 hours ago, Stu_Magoo said:

I would have gone to a garage as soon as possible and got this evaluated correctly.

 

Good.

 

I have found a 200 mm long allen key completely inside a tyre before now.

Just a small hole visible from the outside of the tyre.

 

Thanks AG Falco

I had one car many years ago (Ford Orion) - late 80's - that I bought second hand - 3 years - from a dealer. around 20,000 miles on it.

 

Car was not stable on the road - would step out a bit an a bit noisy.

 

Went on for a while - could see nothing wrong with the tyres - probably - but not sure factory original on rear.

 

After a few months and when I had the spare cash - decided to change the 4 tyres to see if it would help the situation - make all 4 same.

 

On changing the tyres - there was a wheel brace (spanner for undoing lug nuts) inside the tyre......

 

After changing the tyre... problem solved