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Tyres - Odd Puncture

C

charanpal71

PCGB Member
Member
Hello,

New to the Cayman post I have owned my Cayman S since March 06 and also paid 54k for the car; and what a great drive

Anyway, having approached 19,500 miles my rear tyres needed replacing (1st set) and therefore I rang around and managed to get Michelin Pilot Sports N1 265/35/ 19" for 240GBP each from Pro Tyres in Slough, part of the Michel Dever Group. This was great as I had quotes as high as 370 GBP, funny enough from Porsche...

All was great until I had a really odd puncture last night over a short journey - I heard light bang and thought that was odd and 3 miles later I realised the tyre was deflating quite rapidly

I quickly got the compressor out and hooked it up on order to inflate the tyre and I caught it just before the pinch. However the tyre wall has scrubbed a little on both the outside and inside, may be about an inch into the wall. Does anybody know the best way of checking the wall without the compulsory you need a new tyre, Sir'

Also I am really intrigued because the tyre has not deflated since, compared to a rather rapid deflation the night before?

If anybody has had similar experiences I would be very keen to know....




 
Did you use the foam ? - if so its a temporary repair only, you need to get the tyre replaced. If the side wall shows signs of scrubbing then chances are the braiding and weave are damaged (maybe even showing on the inside of the tyre) - for your own safety get the tyre changed IMO.
 
Providing the tyre isn't more than 30 % worn (new tyre has 7.4 mm tread) then replacing the tyre on its own is within Porsche guidelines. If its more than 30 % worn then porsche suggest both tyres on the same axle are replaced. Puncture repairs are also not advised , though if a professional repair can be effected , personally I see no issue with normal road use in the Uk (ie driving below 80mph). You may also want to consider buying a 986 Boxster / 996 spare space saver wheel and toolkit. This would allow you to have the tyre repaired rather than replaced which is usually the case following use of the tyre glue. The removed wheel will either need to be placed on the passenger seat or in the rear trunk with the interior trim removed. I've found that on a boxster it is possible to bungee the removed wheel on top of the boot lid as a temporary measure.
 
Your description of the event makes me wonder if the tyre fitters who sold you the new tyres had correctly seated the tyre on to the rim. Marked and scuffed sidewalls sound ominous so I wouldn't risk repairing the tyre but I would ask the fitters to examine for an installation fault, and if there is no evidence of another cause, ask them to foot the bill. Berty987's suggestion of buying a spacesaver spare wheel is a good tip. Jasmine Porschalink will sell you one secondhand (i.e. cheaper!) together with a jack and wheel brace. Then, if you get another puncture on your way to the ball, you can ask your passenger, who will be wearing an expensive white silk dress, to hold the punctured tyre and rim on her lap. "Don't worry darling, it's only brake dust, it'll brush off"[:D]
 
Thanks for the replies I should have explained that I did not use any foam and when I arrived home I jacked up the car to inspect the tyre and there were no obvious signs of damage I suspected faulty fitment, but how would you prove that? (It's a shame because these tyres only have 350 miles on them) Cheers
 
You don't need to prove it, all the symptoms indicate that the tyre was not properly seated on the rim and the noise that you heard was thr tyre finally taking up its correct position. The loss of pressure could also be attributed to the same event. Since you would be well advised to buy a new tyre, go back to the supplier and politely and firmly state that you believe that the tyre as originally supplied was improperly fitted. In consequence, the tyre was damaged by a loss of pressure. "Please will you supply me with a replacement under warranty"
 
Thanks for all the advice on this I have to say that Pro Tyres of Slough made this a remarkably straightforward process. The guy (Michael) was true to his word when he said that he would put his hand up if it was his fitter's fault and if that wasn't the cause it could have been a manufacturer's fault. The latter would require me to buy another tyre and I would then be reimbursed by Michelin... As it turned out Alex was spot on and also the inner rim of the tyre was damaged on fitting - there was perhaps a 5-10cm split on the rim of the tyre. Also running on low pressure meant that there were rubber crumbs from the inner casing (no fraying) Tyre replaced at no cost and luckily no damage to the wheel. Tyre cost comes out of the fitter's bonus unfortunately..... Thanks Charanpal
 
[:)]Nice result, nice also that the tyre fitters came clean... I should imagine it makes you want to use them again rather than not.. garyw
 
Nice to hear a firm actually own up and accept responsibility. Certain banks and insurance companies could learn from this!!! [:mad:][:mad:] [:D]
 
Keep on giving him your business; he is quite clearly a chap with principles. Now go out and wear out the tyres the enjoyable way......[;)]
 
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