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A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

97 Mercury Villager, Tired Cupping Problems
Q:
I have a Mercury Villager that works just fine, there is only one complaint. The right front tire is cupping (2000 miles) on the exterior edge of the tire. The alignment, balancing has been checked but still the same problem. Any suggestions?.....Alberto

A: There are two things that come to mind that might explain your problem. Of course this is on the condition that the service you've had performed has been done correctly. There is the possibility that the shock absorber/McPherson strut has a problem. Due to the front-end geometry, the old bounce test is not a true indicator of the condition of a shock/strut unit. The internal components of the shock/strut could easily be worn, which can result in tire cupping. Also, beware that loading of the vehicle has an effect on the suspension geometry and tire wear; loading includes the driver as well. If the driver of the vehicle is a sizable person then the alignment should be performed with the driver in the vehicle.

 
     
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