Minoclan

I had the same noise and in fact, it was the pasm dampers. After a few attempts to get the OEM from Porsche we made the decision to replace all four with the MCS units. The car feels perfect. I lost the ability to just push a button BUT, everything is easily adjustable.

dave292

How did you get rid of the error code?

Minoclan

Short answer is my mechanic did some programming. The sport mode still works.

DJWGT3

Goodmorning- haven't introduced myself proprely, but have been checking rennlist voor 3 yrs now. Owner of a 2007 GT3 meteorgrey comfortspec, 48K miles. Living in the Netherlands.

I am having the same rattling and knocking trouble (and i mean EXACTLY) since a couple of months norwegen911.

In two weeks the GT3 is off to the porsche classic center in Heteren for maintenance en to sort this problem out- I'll keep the results and post them here for need.

Kind regards Dirk

DJWGT3

Update: The problem is indeed the PASM damper, after heating up from driving (the coolant hoses are near that position too) the damper is not able to smooth the travel out anymore causing the spring (H&R) to make the grinding / knocking sounds.

At first they were suggesting te top mount (domlager) but after some lubrication, no difference.

So, problem solved so far. Estimate in NL is 1200,- euros in total.

norwegen911

Many thanks for answer. I had my car two times at two different porsche mechanics. They cannot find any problem in the front after normal troubleshooting. They lubricated the swaybar bushings, no change.

So I was thinking I would eliminate other stuff like drop links, coffin arms, tuning forks by injecting oil into the balljoints? How can I lubricate the top mounts?

jreifler

Injecting oil into those bushings won't solve anything, nor do I think those are the likely source of the noise. If those bushings are bad, you just need to replace them. They're rubber and can wear out / deteriorate.

I'm with the others who suggest it's very likely a damper issue. And they can be rebuilt, but that's probably not cheaper than a replacement unit.

Obviously worth getting the car in the air and double-checking / tightening all suspension and steering components to spec. Also check that there are no loose / unfastened plastic bits - especially brake cooling ducts (which will also make that exact sound if loose).

juanpablo046

I had pretty much the same noise in my 2007 GT3.


We changed control arms and the noise went away 90%, 10% remaining went away with some lubrication but came back after a while. My dealer said it was rubber parts going bad on the suspension.

norwegen911

Did you change lower control arms? Did your noise only come when car was warm after some drive?

The noise in my car is not like that when turning the steering wheel. Its also there while driving slow straight

juanpablo046

Yes, lower control arms.
The noise was only present when the car was warm, yes.

At the beginning the sound was not so directly related to the steering input, it evolved from what I see on your videos to what you see on the one I posted.

I hope that info helps at least to rule out another possible cause.

Maverick11

Doesn’t billstien make a pasm compatible set of coil overs that is plug an play? Probably the cheapest “OEM” solution vs. rebuilding or new stuff via Porsche.

Of course there are higher performance options if you wanted to take the opportunity to upgrade but seem to recall that kit was very reasonably priced.

jamesinger

I left you an overly detailed DM about lubing the top mount spherical bearing. I am interested in if it will work. I mentioned this in other threads but if the top mounts are even a little off, they rattle. Don't do what I did but out of frustration, I just put some bicycle chain lube in there and it fixed the problem for over 2 years and multiple road trips + daily work drives with tons of speed bumps and hellish LA roads/driveways/obstacles. I even have to drive the car a lot off road in gravel/dirt/mixed surfaces. I assume other people on here have strong lubepinions.

I got this idea from Tyson Schmidt after the Eibach guys and PRO (tyson's shop) tried to replicate the rattle to no avail. Also, before install, Glenn Yee tore the coilovers down, inspected them, bench tested the springs and dampers, and then rebuilt them before PRO installed them, so I know they were good. HOUSE also looked over the suspension when it first got a rattle and could not replicate the sound or diagnose it. All shops did what you would expect. They lifted the car up and shook everything really good to try to get it to rattle + checking all the torque specs and etc. Both shops also went on longer test drives but no issue was obvious. Tyson said it was probably the top mounts because the bearing is so sensitive after inspecting everything, so the bike chain lube was my last frustrated attempt before tearing down the suspension and just starting over.

andrewgt3

I'm interested - can you post some photos of your method?

jamesinger

It is seriously just out of frustration that I did this. I just put lube in the top mounts where the bearing thingy is and the rattling stopped.
this is the best pic. I can find of the part alone. I put some lube in it 2 or so years ago and it has not returned.

from ECS.
I am not saying do as I did but I am saying, before you spend money, try lubing this part in the cup where the hard bearing is. I think the normal carreras do not have hard bearings here. The GT3 does. IF the part is failing or is off at all, it rattles and clunks.

BTW, at least 2 times a week, it takes me an hour or so to drive to work 20 miles on LA Freeways, so I have A LOT of time to listen and obsess over ANY little sounds my car might make. 🥵🥵🥵

HarmonyJim

Tractive Shocks are another option. I have them on my 2007 RS, and am very happy with them (I also am using the DCM shock controller and accelerometer). Not cheap, but far better quality and performance than the oem Bllsteins.