TrackerTracker: I have a similar noise same side. Same conditions. Thought it could be the set screws on the ALTA PSRS. They are tough to get at. Check for movement (working the wheel front to back) at the PSRS bushing with the car on the ground. It won't do it with the car up in the air. Probably of one of the ball joints (2) on that side allowing some fore and aft movement of the suspension arm. I'll keep looking for an answer too....

 

Hi Pmello. What other suspension stuff have you done to your car( so we can compare notes).
My installer was told by Alta that the set screws were a little extra
insurance that the sleeves did not move. 3 in the front , one on the back.
With all four tires on the ramp ( i.e. supporting the car) two guys alternately
pushed up then pulled down on the subframe with their full weight to duplicate the movement of the suspension over small/medium bumps.
We did not get any noises . At this point, the only differance between
our "test" induced "bump" and the noise causing road bump was that
the car wasn't running and the wheels were not turning:impatient .

I think that I am going to try to get the OFFICIAL ALTA man to review
this thread ( that we have totally highjacked from Dr. O, but will return to him soon).

 

Car is now on a lift with the wheels off. The suspension is compressed
two inches at the ball joint. Can't see any differances at the Alta fittings.
Checked the torque @ 18 ft/lb of the Intermediate shaft bearing housing
to engine.

Anybody any ideas????? :impatient

 

to simulate a suspension hit? If you're in a shop, it may scare all the other customers away though!

Seriously, if you can't find it this way, the only other way I can think of is to find one of those shops with the magnetic microphone diagnostic thinggies. They get stuck all over the car and you go for a drive. See which one hears what. While I've read about the tools, I've never actually seen them used.

I'm real curious here.

Matt

ps, the impact method may sound primitive, but it's the only way I can think of to simulate what happens on the street.

 

Thanks Dr OBnxs, I'll see if we can find anything like that around here.

Otherwise, I am considering a low tech alternative : Strapping my cell phone at various places on the suspension and calling you to listen in

 

Our expectations of a Dr Obnxs solution:
The resolution of partial differential equations of order two with variable coefficients consisting of transient vibrations within six degrees of freedom involving Coulomb damping of complex harmonic motion.

What we got from Dr Obnxs: Hit it with a big stick



WHAT IS THE WORLD COMING TO

 

/has flash back to college math classes... goes and shudders in corner and sucks thumb.

 

I am getting the same type noise on the passenger side front.
I have the PSRS,Koni FSDs,and H&R springs.The noise did not start until after the PSRS installation and I have rechecked bolt torque.I have used a "dead blow" hammer and have not been able to duplicate on a lift or just sitting on the ground.I'll keep looking for it though.

 

trackertracker..
For what is is worth. I was chasing a rattle in my setup as well.. I had similar situations that would create the sound - slow rolling and I hear the clunks.

My adventures lead me to my Alta control arms.. I found the upper bolts were not as tight as I expected.. I re-torqued them to 70 ft-lbs - what the Bently listed. They upper bolts are a challenge because of the gas tank and heat shield are in the way.. So I could understand how they were not "tight enough" from the first time around..

Another thing I did while I was in there was to wrap the ball joints in a rubber tube (aka bike inner tube).. I was thinking this would help prevent the ball joint from rolling over and "clicking" on the adapters provided.. Plus help prevent dirt from building up..

After that work .. my rear setup is very quiet now..

So maybe that helps you.. Not sure.. just sharing..

 

What a coincidence! I have the same noise on my PSRS. It's only noticible on my MCS over small bumps or slow speed coasting. I have tried to isolate the noise by raising the car, taking off wheels, torque specing all bolts, etc. No luck there.

I was originally worried it was one of my own installation errors, but after reading that several of you experience the same thing, I will just live with it.

It would be nice for ALTA to visit this thread...

 

wtadye,BBcooper and COOPER99 I posted referance to your similar
issues onhttps://www.northamericanmotoring.com/forums/showthread.php?t=41766&page=42. I am sure the ALta guys will get back to us shortly.

 

Are you guys chasing a noise in front or the rear as BBcooper is talking about from his rear heim joint Alta links?

 

We are chasing the noise in the front that appeared after the installation of the PSRS: My Alta rear control arms with heim joints don't make any noise- keeping my fingers crossed .

 

Good Luck
I'm waiting to see what you find before I get these. Have you talked TSW as they have a car or two running the PSRS bushings.

 

The noise is in the front. You are correct BBcooper was talking about the back.
I haven't tryied TSW yet , as I thought Alta might have had some thoughts
or could relay experiances of a wide range of owners. However, I will keep TSW in mind.

 

Talked with the tech at the dealership today. Common problem, the noise is usually caused by a bad upper mount plate or the bushing on the upper strut cocking over making the noise. He recommends looking there. This is on cars without the PSRS bushings which he has not seen yet or installed. Mine will be his first.

Good Luck Hope this is of some help.

 

Newbs49. Thanks for the info. We will check that. We have ordered a Stethoscope / remote microphone system to help locate this and future
noises.

Just in case there is a differance in year of manufacture:

trackertracker= late 2006
cooper99= march 2993
wtadye= ???????
pmello= ???????
hornguys= ????????
vader= ??????

Please let us know your date of manufacture. Plus anybody else with this
problem.

 

Vader is Jan 2004 build.
I'm sure it's not the upper mount plate on mine, already checked that and replaced the bearing. I have IE camber plates.

 

Thanks Vader. We hope the Florida Sound Machine arrives soon so
we can begin the MUSH ( Mini Ultra Sound Happening)

 

Mine is a 10/2004 build.
I have already checked the strut mounts and also made sure the end links were torqued correctly.
I used a remote mount "chassis ears" today and the sound is most prominent in the sway bar area where the bolts mount it through the control arm.I will spend more time on it in the next couple of days and see if I can narrow it down.It may be possible that the shock from the bumps is being transmitted the the sway bar mount bushings.
I'll update when I know more.

Allen

 

just so that potential PSRS buyers don't get the wrong idea....i have these installed w/ RDR camber plates and spax coilovers. no noise issues on my car. i hope the rest of you get this sorted out!

 

Same here. No noise issues, other than a little more NVH thru the steering column. Love what they have done for the car, otherwise.

 

Dont get me wrong,I love these things and even if I cant fix the noise they are staying.The noise is a very minor inconvienience.

 

Same here. The performance it too good to consider removing them. I have a plethora of other noises but I just want to know the source so I can be assured is isn't a safety issue.

 

Same as what Vader said