ISF Sway bar bushings
#16
Lexus Test Driver
iTrader: (2)
I ran the IS F bushings on my front F-Sport bar for a bit after having replaced the F-Sport bushings once or twice. They were better, but eventually I just changed out the bar for an IS F bar, which I actually find to be a better balance (IS F front bar, F-Sport rear bar). Is it faster on the track? Not sure, but I like the way it feels. From memory all of my F-Sport bushings were rubber as well - perhaps they updated them? This was many years ago for me now.
The IS F bushings fit with the F-Sport front bar without any issues, though as I said originally, the F-Sport bar is slightly thinner, so they're not quite as tight as they are on the IS F bar.
Jeff
The IS F bushings fit with the F-Sport front bar without any issues, though as I said originally, the F-Sport bar is slightly thinner, so they're not quite as tight as they are on the IS F bar.
Jeff
FWIW poly being hard black shinny, not so pliable. Rather a PITA to open and get over the bar without getting Teflon on everything in site.
#17
Lexus Champion
Thread Starter
Mine are from the last couple months (2020-07) I have poly 19 and 17mm rears and poly fronts. Oddly one set of fronts have grooves machined in them and the rears too. My take away is they are meant to hold Teflon so I greased them as noted above.
FWIW poly being hard black shinny, not so pliable. Rather a PITA to open and get over the bar without getting Teflon on everything in site.
FWIW poly being hard black shinny, not so pliable. Rather a PITA to open and get over the bar without getting Teflon on everything in site.
#19
Lead Lap
iTrader: (13)
If you find info on the kits themselves. The description reads with harder durometer rubber bushings to minimize deflection. So they maybe just be that.
Last edited by MikeFig82; 10-29-20 at 02:51 PM.
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AMIRZA786 (10-29-20)
#20
Lexus Champion
Thread Starter
#21
Lexus Champion
Thread Starter
Here are some pics of the old F-Sport Front Sway bar bushings
They are made of what I believe is a hard rubber and easily stretchable at the slit. They do have that boring design inside the bushing described by @2013FSport and they seem to be covered by a greyish teflon like powder
EDIT
After re-examining the bushings again, I am re-thinking that it is possible that they are made of Poly. Rubber bushings would most likely not squeak, like the bushings are currently doing. It's possible people are not greasing them thinking they are rubber and that could be the cause. I'm going to do some additional research and if they do turn out to be Poly than I will either re-grease them or replace them with ISF front sway bar bushings
They are made of what I believe is a hard rubber and easily stretchable at the slit. They do have that boring design inside the bushing described by @2013FSport and they seem to be covered by a greyish teflon like powder
EDIT
After re-examining the bushings again, I am re-thinking that it is possible that they are made of Poly. Rubber bushings would most likely not squeak, like the bushings are currently doing. It's possible people are not greasing them thinking they are rubber and that could be the cause. I'm going to do some additional research and if they do turn out to be Poly than I will either re-grease them or replace them with ISF front sway bar bushings
Last edited by AMIRZA786; 10-29-20 at 05:15 PM.
#22
Lead Lap
iTrader: (13)
Here are some pics of the old F-Sport Front Sway bar bushings
They are made of what I believe is a hard rubber and easily stretchable at the slit. They do have that boring design inside the bushing described by @2013FSport and they seem to be covered by a greyish teflon like powder
EDIT
After re-examining the bushings again, I am re-thinking that it is possible that they are made of Poly. Rubber bushings would most likely not squeak, like the bushings are currently doing. It's possible people are not greasing them thinking they are rubber and that could be the cause. I'm going to do some additional research and if they do turn out to be Poly than I will either re-grease them or replace them with ISF front sway bar bushings
They are made of what I believe is a hard rubber and easily stretchable at the slit. They do have that boring design inside the bushing described by @2013FSport and they seem to be covered by a greyish teflon like powder
EDIT
After re-examining the bushings again, I am re-thinking that it is possible that they are made of Poly. Rubber bushings would most likely not squeak, like the bushings are currently doing. It's possible people are not greasing them thinking they are rubber and that could be the cause. I'm going to do some additional research and if they do turn out to be Poly than I will either re-grease them or replace them with ISF front sway bar bushings
Yeah for your fronts its probably swirls to retain grease. The wierd thing is my front Fsport bar bushings has smooth finish on the inside.
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AMIRZA786 (10-29-20)
#23
Lexus Champion
Thread Starter
Here's my stock rear for AWD. They have about 50k miles on them. They look like the Fsport material. The white residue looks to be maybe mold release. Very stiff bushings for the rear. I wish they used the same material for the front instead of flimsy rubber..
Yeah for your fronts its probably swirls to retain grease. The wierd thing is my front Fsport bar bushings has smooth finish on the inside.
Yeah for your fronts its probably swirls to retain grease. The wierd thing is my front Fsport bar bushings has smooth finish on the inside.
Today I ordered ISF front sway bar bushings for around $34 each. I'll live with the squeak and install them next year when I install F-Sport suspension
#24
Lexus Test Driver
iTrader: (2)
OK, here is my contribution. These are indeed polyurethane. And do notice the parallel grooves throughout both.
In my application, I filled them with silicone grease and all is well.
In my application, I filled them with silicone grease and all is well.
Last edited by 2013FSport; 10-30-20 at 04:26 PM. Reason: LOL autocorrect for absolute typing fail...
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AMIRZA786 (10-30-20)
#25
Lexus Champion
Thread Starter
Mine were not as shiny as yours (both the ones that came with the F-Sport Sway bar and the new ones I bought) and have that rubber looking texture, but I agree with you that the ones I have may also be Poly. I will compare them with the OEM stock bushings, which I still have somewhere. The stock sway bar bushings never made even so much as a peep! When these were installed, no grease was added because I though they were rubber. They did come coated in some sort of lubricating material as I had to wear gloves to handle them, which explains why they didn't squeak when first installed but do now...
Last edited by AMIRZA786; 10-30-20 at 10:55 AM.
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AMIRZA786 (10-30-20)
#27
Lexus Champion
Thread Starter
So I'm wondering why they begin to squeak after a month. If they are rubber you can't grease them, you can only use powder lube. Also why do they have the have the grease retaining swirls in them? I've only see that in aftermarket poly bushings
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AMIRZA786 (10-30-20)
#30
Lexus Champion
Thread Starter
This Friday I am going to pull the front and back sway bar bushings and grease them up. This should hopefully stop the squeaking when going over speed bumps and up driveways. Since it worked for @2013FSport I'm confident that this will fix the issue...until it needs be regreased