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YOUR RESEARCHRattling PSS10s
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Reported cause
I too am curious about what the cause turned out to be.
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I had knocking noise coming from the rear as well (boy, that doesn't sound good) and it turned out to be a failed shock mount.
Check interior fittings thoroughly last weekend and found nothing loose
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Performed · outcome unconfirmed · Original poster
I checked all the interior fittings thoroughly last weekend and found nothing loose.
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Performed · outcome unconfirmed · Original poster
I was careful to torque all the fasteners when I installed the bar.
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Performed · outcome unconfirmed · Original poster
The noise was there before I installed the BK bar and remained after I installed it.
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Here's another of those "I've got a funny noise" questions.
When driving over rough roads a rattling noise comes from the top of the rear PSS10 towers - both sides. Sounds like the adjuster **** is loose, but it's not.
I know the mounting bolts are torqued correctly as I did it myself recently when I installed a Brey-Krause harness bar. I can't reinstall the insulated carpet pieces that cover the shock towers because of the BK bar.
Anyone have any idea what is causing this? I could stuff some sound insulation around them but would rather get at the root cause.
Did you check the center nut holding the shock mount to the coilover? I had a rear make noise on me once and that was the culpret. Thankfully it's easy enough to access that nut with them in the car that it's no more difficult than the 3 little ones you secured when you did the harness bar.
OK, this is going back to my e36 M3 so I don't know if it is relevant.
I had knocking noise coming from the rear as well (boy, that doesn't sound good) and it turned out to be a failed shock mount. The rubber in the shock mount disintegrated. I think it was because I went to Bilstein sports rather than stock. If that is the case you may have to use Poly RSMs instead of rubber.
perryinva - thanks for the clarification, I'll check that this weekend.
M3 - thanks for the suggestion but don't think that's the problem, they've rattled from day 1. Had them installed by Sharkwerks and am fairly certain Alex would have let me know if the mounts were bad.
So, what am I checking the drop links for? Alex at Sharkwerks mentioned this too, but I'm not sure how to tell if the rattling is coming from the drop links.
When the car is up on ramps, they seem tight. Have not checked them with the car on a jack on the rears hanging down.
BTW - they are TRG droplinks, only a couple of years old. I'm assuming they should last at least that long.
well, they should be tight and have no play. In my case, the drop links (front) had completely separated.
I now have the Tarrett Engineering drop links.
hey pjorgen.. sorry to hear that... I've seen a few of the drop links from bilstein that have come apart. Not just yours and although we've made them aware of it we haven't had much luck other than them sending out more of the same ones with the plastic ends (that's the issue). Although with the TRG ones (I assume they're the curved ones) they can come loose over time (not break though) so see if maybe that's what happened? Let me know otherwise we have a solution of our own we can give you
Alex - thanks for jumping in on this. I'll try to get under the car over the TG holiday and try to figure out what's up. BTW - here is a link to the TRG droplinks I'm using:
http://store.trgparts.com/rear-dropl...nly-p4796.aspx
They're not curved.
Ahh ok those look like rear drop links? We always use factory ones in the rear? The ones I mean were these ones for the front
http://sharkwerks.com/porsche/996-tu...uspension.html
Roger that... it was late last night and I thought we were talking about the issue with the front bilstein drop links
I really don't use the solid/style ones like that in the rear since they do make a lot of noise and can come loose. I'm not familiar with the geometry of the TRG sway though so I'm not sure if something is slightly off?
I too am curious about what the cause turned out to be. Please update us.
And, to clarify, did this noise only show up AFTER you installed the BK harness bar? Could it just be the bar or bar-mounts squeaking over bumps as the chassis flexes? (mine do that a little)
Quick answer - I haven't figured it out yet.
The noise was there before I installed the BK bar and remained after I installed it. I was careful to torque all the fasteners when I installed the bar. I checked all the interior fittings thoroughly last weekend and found nothing loose. Have not yet had time to crawl under the car and check exterior fittings.
Will post again if/when I learn more.
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