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  #1  
Old 08-22-2012, 05:34 PM
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odd thumping noise after new tires

Just had two new tires put on my car and 2 almost brand new put up front. While driving I can feel a thumping from the left front. It's not major, just kind of an annoying kind of rhythmic thumping.

Car - 87 300D

I jacked that side up and checked the bearing for play by trying to rock the tire front to back and its solid. When spinning the tire the brake pads grab slightly as the tire rotates. Plus while spinning the tire it doesn't spin silently, I'm not sure if I am hearing things or if the bearing is going.

any ideas?

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  #2  
Old 08-22-2012, 08:39 PM
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maybe they didn't balance the tires properly?
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  #3  
Old 08-22-2012, 09:08 PM
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Swap the tires from left to right. If the thumping noise transfers to the other side, it's the tires. If not, it's that part of the car.

If the tires are directional, swap the tires front to back and vice versa.
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  #4  
Old 08-22-2012, 09:15 PM
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Why didn't I think of that!
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  #5  
Old 08-27-2012, 07:53 PM
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Sound moved from the left side to the right side. I'll be calling the tire place and have them check the balance on the tire for me.
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  #6  
Old 08-27-2012, 09:20 PM
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used tire... thumping... bad tire.
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Old 08-27-2012, 10:31 PM
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Hurray!
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  #8  
Old 08-28-2012, 12:25 PM
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"Flat" spot from a skid?
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  #9  
Old 08-28-2012, 12:56 PM
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Even tire out of round is a possibility. Broken belt is the most common though I would suspect.
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  #10  
Old 08-28-2012, 03:41 PM
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As MBeige said, swap sides. If the thump as you describe goes to the right side, google gsp9700.com and go to their site. They will show you where the nearest machine of this type is to you. It is the only way to really analyze such a tire without a bunch of messing around. It has a pressure roller that can analyze RFV which is a fancy term for stiff spots in the tire. It would be worth the money, to get right down to the core of the problem.

Hope this helps.
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  #11  
Old 08-28-2012, 04:22 PM
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Quote:
Originally Posted by barry123400 View Post
Even tire out of round is a possibility. Broken belt is the most common though I would suspect.
Agree
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  #12  
Old 08-28-2012, 05:33 PM
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Whats weird is that it didn't make any sounds or vibrations until a few days after I had the tire put on. The website for the hunter tire thing shows the Discount Tire I went to. I'll call them tomorrow

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