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The mkiv Supra Owners Club

Punture Repair kit


Supra-Dupra

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Tyre repairs should only be carried out by trained persons who are qualified to say what is and isn't safe to repair.

Bodged puncture repairs are very dangerous. I wouldn't be comfortable doing triple digit speeds with a tyre that some geezer on here had 'fixed' rather than getting it done by a pro.

 

You'd still need to make that trip to the tyre centre anyway when you wanted the tyre fitted to a wheel and balanced.

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Tyre repairs should only be carried out by trained persons who are qualified to say what is and isn't safe to repair.

Bodged puncture repairs are very dangerous. I wouldn't be comfortable doing triple digit speeds with a tyre that some geezer on here had 'fixed' rather than getting it done by a pro.

 

You'd still need to make that trip to the tyre centre anyway when you wanted the tyre fitted to a wheel and balanced.

 

You dont need take the tyre off the rim for a start, why would you balance it when its only gone flat ??

 

"Its hard to do it wrong". The words of an experienced dealer.

 

Please guys this is a for sale section.

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I wouldn't be comfortable doing triple digit speeds

 

When a tyre has been drilled, reamed and a vulvanising insert and patch added you shouldn't even be CONSIDERING triple digit speeds!!!!

 

A puncture repair of a Y rated tyre voids that speed rating of 186 mph and the tyre is then treated as having no speed rating!

 

Tyre repairs should only be undertaken by a qualified person to the proper BS specification. There are limits to where the tyre can be repaired based on a percentage of the width of the tyre, which itself is based on the width of the tyre. For a tyre over 200mm in width (i,e, Supra tyres) its 70% of the width across the centre section (so for a 235 tyre that's the central 164.5mm of tread that can be repaired!). Does everyone know this??

Also internal delamination, corrosion or ply/cord damage will not be spotted by the average DIYer.

 

My local Kwik Fit do repairs for free anyway, so why take the risk of botching it myself????

 

Sorry if your friend is put out by this, but I for one don't agree with people drilling holes in their tyres at home and then driving on them!

 

Its a safety critical item and if one lets go the consequences could be fatal.

 

Edit: And if my colleagues in Crash Investigation found out that someone had been killed by a DIY puncture repair then someone would be in court :( Possibly with a conviction for Manslaughter or culpable homicide while driving a vehicle?

A properly certified person would be able to testify that they had done it to the correct procedures & would be able to rely on the fact that they were correctly trained & certified. I for one couldn't, even though I have a degree in automotive engineering design.

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How it should work is the tyre is removed from the rim and the COMPLETE internal structure is inspected for delamination, cord/ply damage,bulges or corrosion. The puncture area is then measured and if under 6mm it can be repaired with a combined vulcanising patch/plug. These are made of two different materials as the inside of the tyre is a different rubber to the tread.

 

A hole is carefully drilled, with a special drill, through the site of the puncture and then deburred with a reaming tool.

The inside and the hole are then cleaned and re-inspected.

Adhesive is then applied to the inside patch area and to the hole, also to the patch and plug.

After the adhesive has become tacky the plug is fed through the hole and pulled through while the patch is secured on the inside.

After the plug has been fully pulled home the patch is presed into place and the repair allowed to set semi hard.

 

The excess rubber of the plug is then trimmed off and the repair again inspected.

 

The tyre is re-installed on the rim, using a new valve, and pressurised to force the repair into the hole fully. Its then tested for leaks and then balanced.

 

Not exactly a DIY job.

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You dont need take the tyre off the rim for a start, why would you balance it when its only gone flat ??

 

"Its hard to do it wrong". The words of an experienced dealer.

 

Please guys this is a for sale section.

 

 

but in the post above it says you dont need to remove the tyre !

 

thats why i was asking how it works coz i thought it was how it was just explaind by K14 sup

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I was speaking to him today he told me they have rarely had to take the tyre off the rim but for the occasional sever punture its necessary but in that situation a differnt repair is required, but for example if you have a nail in the tyre, you can clean and straigthen the hole with the reamer, then push thru your adhesive plug strips with the needle, turn it 2 or 3 times to form a knot, then pull out the needle. As soon as the needle is clear of the tyre cut it off and clean it level with the tyre.

 

A stone in your thread would be more dangerous.

 

You can only plug the thread of a tyre and not the wall.

 

Its not the end all solution kit, its really only for clean puntures, nails, screws, glass fragment etc not suitable for larger slits etc

 

There are different kits, plugs, patchs, depths etc for various situations.

 

If the tyre is corroded it should be changed not repair, not even by a pro.

 

BTW this guys a supplier to the local kwik fit, advanced tyres, pit stop and a few more and they use the these products, and method.

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Ironically im looking at maybe getting my tyre repaired as i have a puncture as a temporary measure. The guy i spoke to on the phone last night confirmed the tyre isnt taken off the wheel.

 

Thank you.

 

TBH, if you had posted something like that in a for sale thread of mine I would have been a little miffed. My dear departed Dad used to say, "If you have nothing good to say, then don't say anything". If it was a genuine attempt to put the seller right on current market values then surely a PM would have been a better medium. :(
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i have to say that if i was getting a puncture repaired i'd much rather have the tyre removed and then fixed than fixed from the outside while still on the rim.

 

when i last had one repaired years ago the tyre was removed and the plug that they used was tapered so that it got narrower towards the outside tread of the tyre, thus minimising the chance of the plug coming out as it physically wouldn't fit out the way and the tyre pressure is keeping it in place from the inside.

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