polyurethane bushing drawbacks

Suspension and other discussion

Postby Gary ST165 » Wed Aug 29, 2007 8:35 am

bridge47 wrote:Way back when, someone had a Camry part # for the spherical bearings. Maybe the "old post hounds" can find it. Seems the board had a black format then.



to which spherical bearings are u refering, where do they fit?
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Postby bridge47 » Wed Aug 29, 2007 12:13 pm

I'm talking about the outboard bushings on arms 1 & 2 where they bolt up to the knuckle. Is the part# for these the one in your pictures of four OE bushings?

I'm sure its been talked about but make sure when using any type of bushing that you tighten bolts with the car on the ground or that
suspension is not relaxed. Otherwise bushings will fail in short order. Mine's a ST185. I've had the Whiteline bushings, no problems as of yet. Does anyone have a pic of a shot poly bush?

Sorry I got mixed up. I believe its the inner ones on arm 1&2 that have Camry part#.
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Postby ___Scott___ » Thu Aug 30, 2007 4:06 am

I am guessing you are referring to these:
http://www.planetcampbell.us/SphericalB ... ement.html
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Postby bridge47 » Fri Aug 31, 2007 6:58 am

Indeed. For the outer part of the arm? Is this the one you have to buy the whole arm or knuckle to get?
Last edited by bridge47 on Wed Sep 05, 2007 2:01 am, edited 1 time in total.
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Postby Gary ST165 » Mon Sep 03, 2007 4:44 pm

bridge47 wrote:Sorry I got mixed up. I believe its the inner ones on arm 1&2 that have Camry part#.



now this is very interesting... i need to replace rear control arm (inner bushings)


please please please !!!! any more info regarding the Camry part# or thread link 8)
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Postby not12listen » Mon Sep 03, 2007 10:38 pm

i have to pipe up on this one.

i HATE polyurethane bushings, for personal and technical reasons.

i've heard it from a few people that SWEAR TO HIGH HEAVEN by them, that they do NOT harm the chassis at all.

if an insulator is designed to absorb vibration and noise, and it is replaced with an insulator that does not absorb noise or vibration, where does the 'left over' energy from the road vibration go? directly to the chassis.

my wife experienced it on her 1988 SC MR2 - she had polyurethane bushings, and over time on less than ideal roads, nuts and bolts would rattle so much that they'd fall off.

i replaced my worn out OEM bushings with the TRD bushings... amazingly, even MORE road noise was removed (yes, my OEM bushings were THAT worn out), and the handling was improved tremendously. the ride was noticeably firmer and stiffer, but not jarring or painful like polyurethane.

the sheer amount of 'unforgiveness' of polyurethane is terrible on chassis.

its boils down to a very simple end.

polyurethane for racing vehicles that DO have a disposable chassis.
OEM or similar daily driven vehicles that do NOT have disposable chassis.
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Postby DipStick » Tue Sep 04, 2007 10:59 pm

Are these spherical bearings also available for the ST-185 without having to buy a new knuckle? Are they the same P/N?
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Postby ___Scott___ » Wed Sep 05, 2007 4:41 am

DipStick wrote:Are these spherical bearings also available for the ST-185 without having to buy a new knuckle? Are they the same P/N?

Yes.
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Postby bridge47 » Thu Sep 06, 2007 1:27 am

not12listen

I can see your point about energy being transferred to the chassis more with poly bushings, however...

1. I can see this being a real issue on cars with aluminum bushings and heim jointed front ends.

2. Put most cars on a lift and using a pry bar(read 5ft min.) try moving the lower control arm fore and aft. The play you'll see is what happens during hard cornering. My ST185 bushings had alot of play(85K miles). Even Car and Driver thought the originals were soft enough to tell the factory reps they needed revision.

3. Poly bushings have had no detrimental effect on my car. Its slightly harsher on "botts dots" and square edges. Where I live it is a good tradeoff b/c roads are pretty good. My rule of thumb is: as long as the steering wheel and shifter doesn't buzz everything is cool.

4. No one has shown a pic of a properly tightened poly bushing that is shot. I'd be interested to know which bolts/nuts came loose or fell off your wife's car.

5. Be aware of your environment. Cold weather and high air pollution are hard on rubber parts(bushings, CV joints, timing belts etc.) Not everyone will have the same story.
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Postby Conrad_Turbo » Mon Sep 10, 2007 8:45 pm

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Anyone come up with the PN for the spherical bearing for the chassis connection for Rear Suspension Arm No. 1 or No. 2? I know I need to replace No. 1...
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Postby Gary ST165 » Wed Sep 12, 2007 11:00 am

Conrad_Turbo wrote:Anyone come up with the PN for the spherical bearing for the chassis connection for Rear Suspension Arm No. 1 or No. 2? I know I need to replace No. 1...


no.1: http://alltrac.net/phpBB2/viewtopic.php ... highlight=

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Postby Conrad_Turbo » Wed Sep 12, 2007 3:51 pm

Thanks Gary for the clarification. For the inside bushing for Rear Suspension Arm No. 1 I need 48725-20500.

1sttoyotaparts doesn't have it listed. Have to order it overseas and have it shipped?
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Postby Timpa » Thu Sep 13, 2007 1:43 pm

Conrad_Turbo wrote:Thanks Gary for the clarification. For the inside bushing for Rear Suspension Arm No. 1 I need 48725-20500.

1sttoyotaparts doesn't have it listed. Have to order it overseas and have it shipped?


Hey Conrad_Turbo.

Is Yours car ST185 or ST205 ?? 48725-20500 is ST205 rear arm no1 inner bush. I´m not sure fit it also in ST185 same rear arm no1 ??

My car is ST205.


I order those bushes at last week. Those are "afterdelivery" and i haven´t got them yet. Estimation delivery day is 20.09.07. After then I can replace them.

I live here in Finland and order those bushes in Toyota Auto Finland. And those cost 33,60 e/piece.

But I haven´t find out yet bushes inside bush in rear arm no2.
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Postby Conrad_Turbo » Thu Sep 13, 2007 5:50 pm

I have a ST185...I can't be the only person with a 17 year old car that wants to replace this bushing with a quality OEM piece. I'm assuming the 205 bushing is the same as the 185 bushing...
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Postby Gary ST165 » Mon Oct 01, 2007 1:25 pm

ST205 rear arm #1 inner bush 48725-20500


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