tire bobbing between 90 and 100 km speed
01-28-2013 | 02:23 PM
#11
Senior Member
Joined: 02-14-2007
Posts: 380
From: Luskville, QC, Canada
Just had wheel bearing, front struts, tie rods, the control arm bushings, rotors and brake pads replaced. I have new balanced tires. My 2006 HHR starts shaking at around 90 km/h which changes into what feels like a bobbing of the passenger side tire. All this stops at 120 km/h
The problem did not exist after repairs and started suddenly. I did not drive over a curb or damage the wheel whatsoever. I wondered that the mechanic did not alignment after changing the control arm bushings. I have read here that this is needed when those bushings are replaced. Is this a alignment issue or maybe it is a tire issue? There is no sign of wear on the tire. The bobbing of tire is up and down without the steering wheel showing any sign of vibrating or pulling to one side.
The problem did not exist after repairs and started suddenly. I did not drive over a curb or damage the wheel whatsoever. I wondered that the mechanic did not alignment after changing the control arm bushings. I have read here that this is needed when those bushings are replaced. Is this a alignment issue or maybe it is a tire issue? There is no sign of wear on the tire. The bobbing of tire is up and down without the steering wheel showing any sign of vibrating or pulling to one side.
Yves
01-31-2013 | 09:27 PM
#13
Thread Starter
Joined: 01-27-2013
Posts: 2
From: Canada
I had the tires balanced again. They were ok. Shaking was back after balancing. I checked everything possible underneath and all was tight and the way it should be. There was no ice or snow cacked on the rims.
I decided to go to the tire dealer i bought the tires from. He checked them again and all was ok. He took his time and even cleaned the area where the rims seat against with a wire brush, same at the rim. He checked the tires and all were ok. Mounted back on and no more shaking.
My guess is that rust and dirt caused the rims not to sit properly and it caused the shaking. I noticed too that the first balancing was done without using a bolt pattern clamp but just a regular flat clamp. The bolt pattern clamp clamps the rim where the bolt seats are, the regular flat clamp clamps the face of the rim. The bolt pattern clamp guarantees a better balancing. Never thought that such simple issue as unclean rim seats could cause so much shaking.
I decided to go to the tire dealer i bought the tires from. He checked them again and all was ok. He took his time and even cleaned the area where the rims seat against with a wire brush, same at the rim. He checked the tires and all were ok. Mounted back on and no more shaking.
My guess is that rust and dirt caused the rims not to sit properly and it caused the shaking. I noticed too that the first balancing was done without using a bolt pattern clamp but just a regular flat clamp. The bolt pattern clamp clamps the rim where the bolt seats are, the regular flat clamp clamps the face of the rim. The bolt pattern clamp guarantees a better balancing. Never thought that such simple issue as unclean rim seats could cause so much shaking.
01-31-2013 | 10:48 PM
#15
Senior Member
Joined: 01-13-2008
Posts: 4,708
From: Washington State, where it rains
Back in a day I was trained on a tire balancer set in grams(instead of oz)..the demo placed a dollar bill between the hub flat and machine mount..it threw everything out of wack, was surprised especially this close to centerline.So it doesnt take much to throw a perfectly balanced wheel/tire out once mounted.
01-31-2013 | 11:16 PM
#16
Platinum Member
Joined: 01-09-2007
Posts: 15,984
From: SE USA
But you want a good Balance job, go to a shop that uses a Hunter* "Road Force" tire balancer..
That's a beautiful thing..
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