, Salem, MA


November 24, 2012

Auto Scanner: Why are my tires losing air?


A: Your email is of course timely due to road control that is needed for winter driving. Bad shocks can be quite a danger. You can do a bounce test of each corner. More than 11/2 rebounds are unacceptable. There is, however, more testing to be done. The jounce bumpers need to be examined as well as checking for hydraulic leaks. I hope this helps. Bad shock absorbers can also cause tires to set a scalloping pattern on your tire. This leads to tire rotation. Rotating your tires will offset the effect of wearing shocks (scalloping) and less than perfect front end components.

Car Care Tip: As winter approaches, checking your vehicle’s tires is more crucial than ever. A rule of thumb would be to stick a quarter in between the treads of the tire. Insert the quarter head first. If you can see George Washington’s hairline, the tire is ready for replacement. If that’s too difficult for you, then visit your local repair shop. It will only take a minute to check your tires’ tread depth and tire pressure.


Larry Rubenstein is a master technician who owns a North Shore service station. His column appears every Saturday. Write to Larry at The Salem News, c/o Auto Scanner, 32 Dunham Road, Beverly, MA 01915, or send an email to

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