Rocky Mountain Club B5

Discussion Forums => Modifications => Topic started by: snickryder on March 22, 2007, 02:45:20 PM

Title: Noisey rear swaybar
Post by: snickryder on March 22, 2007, 02:45:20 PM
I recently bought and installed a Neuspeed 28mm rear swaybar.  I've done the install on two other cars in the past, so it's not like it was a new process for me.  I installed the endlinks, lubed the inside of the bushings, mounted the bar and attached the endlinks.  Pretty simple really.  Now, everytime I go over an uneven surface (and at any speed, literally 1mph and up) there is a god-awful squeak (almost a cracking or groan) from the rear suspension.  Anyone else have this happen?

Now, this is a 42K mile old car.  To make sure I didn't break something else I pulled the rear bar off last night and put everything back to stock.  The drive around the block and into work this morning was quiet and normal.  

I've gone over the instructions again and I can only come up with two things.  One, I didn't torque the endlink bolts enough, but the instructions don't specify a torque amount.  Two, I didn't put enough lube in the rubber bushings.  The instructions don't say to, but should I lube the surface that mounts to the stock swing arm?  I suppose the bushings could be moving slightly on the metal and making the sound.

Thought I'd ask here before I called Neuspeed and talked to them.

Title: Re: Noisey rear swaybar
Post by: 92UrS4 on March 22, 2007, 02:48:39 PM
Bushings, I think if you search here and other forums you'll find this to be a common complaint. Otherwise a fine sway bar.
Title: Re: Noisey rear swaybar
Post by: ianacole on March 22, 2007, 02:55:00 PM
It could be the rear spring isolators... Add a straight through exhaust and you won't hear the squeaking anymore ;) :D
Title: Re: Noisey rear swaybar
Post by: snickryder on March 22, 2007, 03:54:18 PM
Just found this on the Neuspeed site:

Question : How do I prevent my polyurethane sway bar bushings from squeaking?  No matter what I do they still seem to make noise.
Answer : We apologize if you are experiencing any sway bar bushing noise with our NEUSPEED sway bar kits.  One of the great things about polyurethane bushings is that they are firmer than rubber and offer a much longer life span than rubber.   However, they sometimes make a squeaking sound when the grease you originally applied to the bar and the bushing wears off.  This is the tradeoff for improved performance.

There are a few tricks you can use to reduce or eliminate the squeaking.  First, support the car on jackstands or use a driveup lift to elevate the car.  Next, disconnect the end links on the bar so you can rotate it up and down by hand.  Does the bar rotate smoothly without much effort?  If it does, you just need to put a fresh layer of grease between the bushing and the bar.  Remove the bushings and apply a light coating of white lithium grease, or a synthetic bearing grease, to the inside diameter of the bushings.

If the bar does not rotate freely and has significant binding, first check the torque of the bolts securing the c-clamp over the bushings.  Make sure these bolts have not been overtightened, pinching down the bushing.  If the bolts are correctly torqued, then remove the bushings from the bar and clean them.  Use a medium grit sandpaper (400 grit) and lightly sand the inside diameter of the bushings.   Apply grease to the bushing and refit the bar.  If binding persists, more sanding may be required.

When I disconnected the endlinks last night the swaybar didn't move at all.  Maybe the bushings are too tight and even with grease they aren't moving.  I'll try opening them up this weekend.

Title: Re: Noisey rear swaybar
Post by: ianacole on March 22, 2007, 05:31:06 PM
Nice of them to tell you to check the torque setting, then don't give it to you - again. :roll: