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Information vacuum regarding rear trailing arm bushing

 
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Old 11 Aug 2019, 03:55 pm
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Question Information vacuum regarding rear trailing arm bushing

So... I've spent my afternoon searching the Google, Energy Suspension and the PTCL, but the trailing arm bushing seems to leave a mystery about installing poly Trailing arm bushings (Energy Suspension #5.7113R on 03 PT GT).
Its mentioned that I have to burn out the old ones and leave the metal shell (done fronts before, easy enough). But the problem is since I cant find any refence to get an idea, I'm afraid I'll burn out the originals on a daily driver and find I can't install the new polys for whatever reason.

So, if anybody has any insight into the installation process... it might put my mind at ease.
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Old 11 Aug 2019, 05:08 pm
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Default Re: Information vacuum regarding rear trailing arm bushing

I don't know of any of the active members that have used these specifically on the rear trailing arms of a PT Cruiser. There's actually a lot of hate around this forum for polyurethane bushings in general. But not from me. I've used them several times on the sway bars, but never for the rear suspension trailing arms of a PT. The original butyl rubber rear trailing arm bushings don't seem to wear much on PT's in the southern US. I've sent some salvage hangers w/bushings to other members. Normally they live in colder climates with lots of road salt.

And since the rear just costs in the PT, I'm not sure the polyurethane is going to provide much if any improvement. If yours are bad, you might replace them with new hangers with the bushings already in them. These only take about 10 minutes to remove from a salvage PT if you have a strong battery-operated impact wrench.

If for some reason, I was dead set on replacing these with polyurethane inserts, I would likely push the old butyl rubber bushings out with a shop press. I don't like heating things like this if I don't have to because it can weaken the steel.
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Old 11 Aug 2019, 05:39 pm
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Default Re: Information vacuum regarding rear trailing arm bushing

Ive used polys on a few cars and never regretted it, so im not worried about that. Its more about being 1.5 hours from a salvage yard (ugh!, I try to avoid the cities these days. Im happy now out in the rural part of Kansas )
I dunno, maybe im overthinking possible problem, but I know how my terrible random luck works.
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Old 11 Aug 2019, 07:37 pm
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Cool Re: Information vacuum regarding rear trailing arm bushing

I installed the entire black ES bushing kit in mine a number of years ago.

For the rear trailing arms I used a knife and cut one side of the bushing flange off. With that out of the way I rigged up a press with a bar clamp and some tubing and whatnot and pushed the old bushing out of the trailing arm. They came out fairly easily. The ES bushings slide right in place, be sure to use plenty of the appropriate lube.
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Old 11 Aug 2019, 08:27 pm
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Default Re: Information vacuum regarding rear trailing arm bushing

Hi, I replaced them both on my PT with the OEM tools.

Like with any bushing removal, the fastest and easiest way is to use an oxy-acetylene torch to melt out the rubber, and then use a fine toothed air-saw to cut a slot in the steel bush housing, and then use an air-hammer with a wedge tip to push it out.

I chose not to go the route above since I ordered the proper C-Frame and drivers/receivers. However the receiver wasn't enough in its ID and I had to bore it out on the lathe. Here's the tools.
Special Tool C-4212F, with Receiver, Special Tool 8405-1

Kudah440 you can buy the alldata for your car and view the remove and install information for the procedure.
Your Vehicle: 2003 Chrysler Truck PT Cruiser L4-2.4L Turbo VIN G

Vehicle Steering and Suspension Suspension Trailing Arm Bushing Service and Repair

http://www.alldatadiy.com/index.html
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Old 11 Aug 2019, 09:12 pm
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Default Re: Information vacuum regarding rear trailing arm bushing

Ok Rckt, that sounds doable. I was a little nervous about getting the naked bushing tucked into the original bushing shells, but it doesn't sound terrible.

PTGT, Thanks for the info, but while pushing out a factory style bushing and back in is easy enough, im installing Poly bushings where I have to burn the rubber out of the original set up and install the rubber (polyurethane in this case) without a metal shell into the original metal shell. I cant find instructions and Ive never done one this size and im sure something will surprise me tomorrow.

Thanks for the replies everyone.
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Old 12 Aug 2019, 12:59 am
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Default Re: Information vacuum regarding rear trailing arm bushing

Quote:
Originally Posted by kudah440 View Post
PTGT, Thanks for the info, but while pushing out a factory style bushing and back in is easy enough, im installing Poly bushings where I have to burn the rubber out of the original set up and install the rubber (polyurethane in this case) without a metal shell into the original metal shell. I cant find instructions and Ive never done one this size and im sure something will surprise me tomorrow.
I literally just told you, and one other member above, how to do it above ? I cant understand why youre confused - still.

It's not in fact easy to install and remove these trailing arm bushings. They're the same size as used in light duty dodge ram series trucks.

The urethane bushings need to be installed with the oem tools as the bushing would otherwise squish outwards and be impossible to install. This is my recollection of the process. Mine that was installed is the energy suspension brand bushing, and I don't recall that they're the two-piece style that can just slide in with some special grease.
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter

Last edited by _PTGT03; 12 Aug 2019 at 01:06 am.
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Old 12 Aug 2019, 09:34 am
Fk5 Fk5 is offline
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Default Re: Information vacuum regarding rear trailing arm bushing

I don't see the point. The rear suspension is like a shopping cart. The trailing arms just let it go up and down. They aren't particularly stressed and I don't think tightening them will alter handling at all. My passenger side arm snapped completely and the only time you would notice was under braking. Did the people that put them on notice any changes? Any description of ride and handling changes?

I don't think @Handy_Cruiser's suggestion of getting new hangers pre-loaded with bushings will work, because the bushings are in the trailing arm, not the hanger. It is almost like a leaf spring eye bushing. I guess people have used aluminum for leaf springs for years, but that is to help launch. Won't matter with FWD.
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Old 12 Aug 2019, 10:56 pm
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Default Re: Information vacuum regarding rear trailing arm bushing

Quote:
Originally Posted by Fk5 View Post
I don't see the point. The rear suspension is like a shopping cart. The trailing arms just let it go up and down. They aren't particularly stressed and I don't think tightening them will alter handling at all. My passenger side arm snapped completely and the only time you would notice was under braking. Did the people that put them on notice any changes? Any description of ride and handling changes?
Makes a massive difference. Read some of the theory online of rubber bushings vs a 'floating' urethane style.
Probably only changing one set of bushings won't make any difference, but changing every bushing certainly has a real impact.
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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Old 13 Aug 2019, 12:20 pm
Fk5 Fk5 is offline
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Default Re: Information vacuum regarding rear trailing arm bushing

Quote:
Originally Posted by _PTGT03 View Post
Makes a massive difference. Read some of the theory online of rubber bushings vs a 'floating' urethane style.
Probably only changing one set of bushings won't make any difference, but changing every bushing certainly has a real impact.
I understand poly can make a huge difference. My question is about these specific bushings. I don't think they really support the car and the axle just rotates on them. I don't think there is much deflection. Do they just slide more smoothly?

I thought that the proper sized bearing would be smoother, but that would be expensive and tougher to size. If it weren't for the potential side to side action, I think the bearing would be way nicer for the application, but the ability to handle some of the side loading makes for a more expensive bearing. I know that some of the European cars use bearings at spots where other econ-boxes use bushings. It is why cars like Jettas used to feel like "quality" compared to Neons and PTs.
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