2014 SE TRD rear sway bar installation problem - Page 3 - Toyota Yaris Forums

91mustang · 12-25-2016, 08:32 PM

I can't remember if there are bump stops with them. I'll have to look.

I just ordered a white line 22mm rear sway bar for my 2012. Does this issue still apply in my situation?

CoryM · 12-26-2016, 05:24 PM

Just to be clear: These are not bump stops. They are just vibration dampeners to deal with NVH. Basically some chassis engineer found that in that area of the vehicle there was a vibration that may cause excess noise to the driver. So they bolt a dampener in place because it's cheaper than making new axle assemblies. Chances are you can remove the dampener and never notice any noise difference.

NYC-SE · 12-26-2016, 06:44 PM

Quote:

Originally Posted by CoryM

Just to be clear: These are not bump stops. They are just vibration dampeners to deal with NVH. Basically some chassis engineer found that in that area of the vehicle there was a vibration that may cause excess noise to the driver. So they bolt a dampener in place because it's cheaper than making new axle assemblies. Chances are you can remove the dampener and never notice any noise difference.

That's interesting. I have wondered about their purpose since I discovered them. So is this the "official" explanation? If so how did you come by this info?

CoryM · 12-26-2016, 07:50 PM

https://en.wikipedia.org/wiki/Dynami...ation_Absorber

Think of it as putting your finger on a small bell and ringing it. Much quieter right? I come by the info by knowing a bit about physics..... and being a mechanic :þ I would ASSume that by putting small dampeners there, it prevents the NVH from travelling to the body (which will amplify it) and potentially bother the driver. The other likely cause would be due to Toyota adding disc brakes to an existing twist-beam and finding squeal/groan complaints. Rather than making a new twist-beam they just bolt those dampeners on until the next redesign.

In practice removing that dampener will likely result in no noticeable change in NVH to the driver.

davinoft · 12-27-2016, 01:11 PM

Go to fastenal.com and order part number 1111 6380 it's a M10 1.25 x 30 millimeter Bolt you can use these bolts to the factory bump stops with no problem I used on my 2014 SE model

Sent from my SM-G925P using Tapatalk

91mustang · 12-27-2016, 09:29 PM

In that case I'll just remove em. I don't know if there is a fitments difference between white and the TRD unit. Nvh doesn't bother me.

lambo · 01-04-2017, 08:01 AM

Thanks for the detailed info ... I was looking for a mod for my new (new to me) 2014 LE

NYC-SE · 01-04-2017, 01:35 PM

Quote:

Originally Posted by lambo

Thanks for the detailed info ... I was looking for a mod for my new (new to me) 2014 LE

The LE models do not have the dampers. Sway bar can be installed in normal fashion. The modification only applies to 2012-2014 SE models.

91mustang · 01-04-2017, 02:29 PM

I installed my white line bar, I didn't have to remove any dampers on my SE. I honestly did not even see them or look for them during the install.

NYC-SE · 01-04-2017, 03:24 PM

Quote:

Originally Posted by 91mustang

I installed my white line bar, I didn't have to remove any dampers on my SE. I honestly did not even see them or look for them during the install.

Then they weren't there. If they were it would be obvious. Did you buy the car new?

91mustang · 01-05-2017, 01:17 AM

I'll take another look, I think it is because the white line installs differently.

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12-25-2016, 08:32 PM	#37
91mustang Drives: Charcoal 2012 Yaris SE 5 Speed Join Date: May 2016 Location: Smithfield, VA Posts: 145	I can't remember if there are bump stops with them. I'll have to look. I just ordered a white line 22mm rear sway bar for my 2012. Does this issue still apply in my situation?

12-26-2016, 05:24 PM	#38
CoryM Drives: 2009 5-door, 5-speed Join Date: Sep 2011 Location: White Rock BC Posts: 687	Just to be clear: These are not bump stops. They are just vibration dampeners to deal with NVH. Basically some chassis engineer found that in that area of the vehicle there was a vibration that may cause excess noise to the driver. So they bolt a dampener in place because it's cheaper than making new axle assemblies. Chances are you can remove the dampener and never notice any noise difference.

12-26-2016, 07:50 PM	#40
CoryM Drives: 2009 5-door, 5-speed Join Date: Sep 2011 Location: White Rock BC Posts: 687	https://en.wikipedia.org/wiki/Dynami...ation_Absorber Think of it as putting your finger on a small bell and ringing it. Much quieter right? I come by the info by knowing a bit about physics..... and being a mechanic :þ I would ASSume that by putting small dampeners there, it prevents the NVH from travelling to the body (which will amplify it) and potentially bother the driver. The other likely cause would be due to Toyota adding disc brakes to an existing twist-beam and finding squeal/groan complaints. Rather than making a new twist-beam they just bolt those dampeners on until the next redesign. In practice removing that dampener will likely result in no noticeable change in NVH to the driver.

12-27-2016, 01:11 PM	#41
davinoft Drives: yaris Join Date: Nov 2013 Location: nj Posts: 2	Go to fastenal.com and order part number 1111 6380 it's a M10 1.25 x 30 millimeter Bolt you can use these bolts to the factory bump stops with no problem I used on my 2014 SE model Sent from my SM-G925P using Tapatalk

12-27-2016, 09:29 PM	#42
91mustang Drives: Charcoal 2012 Yaris SE 5 Speed Join Date: May 2016 Location: Smithfield, VA Posts: 145	In that case I'll just remove em. I don't know if there is a fitments difference between white and the TRD unit. Nvh doesn't bother me.

01-04-2017, 08:01 AM	#43
lambo Drives: 2014 Yaris Join Date: Dec 2016 Location: Puerto Rico Posts: 4	Thanks for the detailed info ... I was looking for a mod for my new (new to me) 2014 LE

01-04-2017, 02:29 PM	#45
91mustang Drives: Charcoal 2012 Yaris SE 5 Speed Join Date: May 2016 Location: Smithfield, VA Posts: 145	I installed my white line bar, I didn't have to remove any dampers on my SE. I honestly did not even see them or look for them during the install.

01-05-2017, 01:17 AM	#47
91mustang Drives: Charcoal 2012 Yaris SE 5 Speed Join Date: May 2016 Location: Smithfield, VA Posts: 145	I'll take another look, I think it is because the white line installs differently.