What Exactly Is a Bushing? Rubber Suspension Bushings Much more pliable than polyurethane, rubber is a great choice for those looking for a bit more give in their suspension.
This means that rubber bushings make for a much smoother ride. This is one of the main reasons—aside from cost—that OEMs use rubber ones on the assembly line.
Hardness: When compared to polyurethane, rubber is a lot more pliable. Lifespan: Rubber suspension bushings have a much shorter lifespan than poly ones. Over time, the stresses of the road cause rubber to warp and stretch.
Squeaking: Squeaking occurs when bushings rub against their metal housings. Maintenance: Aside from eventual replacement, rubber bushings are percent maintenance free. Installation: Installing a rubber bushing is a lot harder than installing a poly one. It usually requires a hydraulic press and the complete removal of the affected spring or control arms. Feel of the Road: If you replace your old rubber bushings with new ones, you can expect the road to feel similar to what it was before they failed.
As rubber has a lot more give than poly, it gives you a smoother ride. But this excess suspension movement makes it harder to turn on a dime. Price: Though available at a discount to OEMs, rubber bushings are more expensive for end users. Polyurethane Suspension Bushings Once the domain of the military and racecars, polyurethane bushings did not become widely available until the s.
Hardness: Polyurethane bushings are much harder than rubber ones. Joined: May 16, Posts: Profile Page. Joined: Jul 25, Posts: 4, Profile Page. You have the ones with grease fittings? No grease fittings,but they didn't squeak Fixed it,no problem. Too bad urethane bushing can be squeaky because they are way better than the usual shit quality rubber bushings available. Truckedup , May 25, Joined: Aug 13, Posts: 2, Profile Page. They usta come with a white silicon grease, that always worked for me, never had a squeek.
I've been using them for years without an issue. Joined: Jun 13, Posts: 3, Profile Page. Turn up the radio. Joined: Nov 20, Posts: 12, Profile Page. Joined: Dec 15, Posts: 1, Profile Page. Kenneth S , May 25, Joined: Sep 4, Posts: Profile Page. Just for future reference, some companies offer Poly-Graphite bushings which are polyurethane bushings with graphite in them to keep them from squeeking. I feel your pain, I have squeeky bushings in my Impala.
TNTcoupe , May 25, Joined: Aug 3, Posts: 2, Profile Page. CutawayAl , May 25, Joined: Feb 6, Posts: 1, Profile Page.
Let's remember one thing: in a bonded-rubber bushing it's the rubber that twists between the inner and outer shell. The rubber is the pivot. Nothing slides, nothing rotates. This is why rubber suspension bushings must be snugged when the suspension's at normal ride height - you want to ensure the bushing is in its neutral position most of the time, and that the rotational travel is roughly even in both directions from neutral.
Urethane bushings well, all but a very few are not flexible enough to do this, so they rotate on their inner sleeve. This is bad. They will squeak, they will gall and egg-out and can cold-flow. I have NEVER in thirty years seen a case where a urethane bushing subject to wear will outlast an OE-type Silenbloc or equivalent bonded-rubber bushing.
As far as I'm concerned, for something like a rotating suspension pivot urethane's bad juju. Sway bar brackets 'cause they're easily lubricated and rubber wears there anyway. Track cars if you must because noise doesn't matter and they should get regular inspection though it's kind of a quick-n-dirty alternative to a spherical bearing or even Delrin. Sway-bar end links and body mounts where the bushing doesn't rotate. JEM , May 25, Joined: Jun 10, Posts: 4, Profile Page. I'm moving away from poly bushings on suspension for a few reasons.
Squeaking is just one of them. For air spring cars and trucks, you have such a range of motion and long dwell times at the extremes that rubber just doesn't cut it. I personally have switched to needle roller bearings! Petroleum grease will work but does not lubricate the same as the synthetic pearl jam. And it seems to me we get accelerated wear on petro greased bushings over just about everything. ELpolacko , May 25, It's high effort but it does make them a little less sloppy.
I tried this on my truck swaybar, and have not driven it yet, but when I took it apart after just moving it about by hand, the teflon tape had gotten all wrapped around itself and ruined. I hope you folks have better success. I've found the center sleeve to be too short in most aftermarket control arm bushings, and you can't tighten the bolt to spec. On my Global West Delrin-Aluminum front control arm bushings, I added length with a welder, then filed the end of the sleeve flat again.
No bind there. Just found this. I'll try it on the poly bushings on the front of the S10 next time i do something to the front suspension. The video doesn't show up for me, but based upon the comments it appears that you just wrap teflon tape around the center sleeve. I don't know how you could get the bushing on over that without destroying the tape.
They fit tightly. I was actually able to get the first bits in by hand, but the last cylinder I actually had to press against the concrete floor of the garage and stand on it to get it to go in. But the way you get it to go in without the tape coming out is in how you wrap it. It also helps to wrap the tape over the open end of the sleeve, and to leave some tape sticking out of the other side.
You'll need to log in to post. Log in. Login Digital Edition Buy a Subscription. That is absolutely berkeleying amazing! Dunno why i never thought about it. In reply to boxedfox : Instead of poly bushings I use aluminum bushings with grease zerks.
Then you can anodize them if you want.
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