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Tire Question

Posted: 21 Aug 2009 16:09
by Rblackadar
My car for the past 2 years or so has had leaky tires on 2 of the 4 wheels and the rims have been resting on the tires. I imagine this isn't good for the tire. There is no cracking or anything like that on them....those suckers are new Dunlops and haven't seen the road since I have had the car. Do you guys think I should can them and get new ones to be safe. I just haven't had much time this year to work on it....new house and all.

Posted: 21 Aug 2009 16:39
by jclay (RIP 2018)
Pump them up and see if they hold air. You can't Dunlops to fit our cars any more.

jclay

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Posted: 21 Aug 2009 16:45
by Beans
The carcass inside the tyre walls might well be damaged due to the rims and the weight of the car resting on them.
But it will be impossible to find that out with no visible damage.
What’s wisdom here, really don’t know. Pretty much depends on how the tyres look and feel once they are inflated again.
Over inflating them (don't exceed the maximum allowed pressure) might highlight damage spots. And make sure it can't explode in your face [B)]

At least next time put the car on blocks so the load is of the tyres ....


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Posted: 21 Aug 2009 17:36
by Workshop Help
You may find, if these are the original steel wheels, surface rust has occurred along the bead of the tire allowing air leakage. If so, the rust must be ground off with a die grinder to re-establish an air tight mounting surface. This happened to our spare tire.

Please have the tires inspected by a qualified tire store while they are dismounted to service the rims.

On aluminium wheels, the surface corrosion or oxidation will not be quite the problem as on steel wheels. However, it too should be removed for a proper air tight seal. Also consider replacing the valve stem at this time.

With the tires removed, have the wheel checked for trueness to see if it is out of round. This is done on the tire balance machine where the wheel is spun. There should be no wobble. Finally, once the tire and wheel have been reassembled and balanced, it is very important to HAND TORQUE the lug nuts. If the mechanic uses a air powered wrench, there is a very good possibilty of collapsing the lug nut dimples of the holes and warping the wheel. This results in the famous TR7 steering wheel shake at 50-60mph.

Mildred Hargis

Posted: 22 Aug 2009 02:20
by silverseven
and as a foot note to mildreds post, once you've got the rims and tire mounting surfaces cleaned up, I allways found it helped to give a good coat of "bead sealer" before mounting them all up.

Ron.

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Posted: 24 Aug 2009 17:14
by Rblackadar
They are all mounted on the Victory Edition wheels.Steel. I am getting them all refinished with powdercoating. I have a place an hour from me that does a great job. While the tires are off, I'll have them inspected.Thanks.