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I have an 992 Carrera S.
I have an knocking sound coming from the front end, i have checked the bump stops that comes with delivery. Porsche service has also runned with me, but doesent think i sounds odd. We were not able to force the same sound as a i get in my street at home. They also checked the car on a lift quick, but it dosent seems that anything was loose. But as soon as i came home drove on the same street i could hear it immediately Called the service center and told them. They told me drive a bit more and se if it gets worse .
The sound comes only at very low speed over small street bums with sharpe edge on them, it sounds a bit like an spring thats springs out if you know what i mean. Almost ike a car thats lowerd. I dont hear it on b roads tho
Tire pressures?
Is it getting colder there?
Does the car sit outside?
I think this is the "acorn" effect we talk about on the 991 Forum. Mainly do to the suspension geometry. In a nutshell (pun intended) your tires are skipping on slow full lock turns. You are perceiving it as a knocking sound.
I might have the same problem with my car. Have an apointment in 3 weeks for something else and wanted them to check this.
Just checking, is it just one knock you hear when going on and off a speed ramp? Sometimes I also have it when turning slowly in a parking place and there is some very small curb. But always one knock and I can not say where it is coming from, just somewhere at the front. You can not really hear it from the outside either.
I might have the same problem with my car. Have an apointment in 3 weeks for something else and wanted them to check this.
Just checking, is it just one knock you hear when going on and off a speed ramp? Sometimes I also have it when turning slowly in a parking place and there is some very small curb. But always one knock and I can not say where it is coming from, just somewhere at the front. You can not really hear it from the outside either.
Is that the same?
Thank you i might say
Exactly what i hear, one knock . It can go from side to side when the Car goes over . It is anoying this sound. And only i very lowe speed and sharp edges
Unfortunately the Porsche guy who runned with me didnt hear it on that road we drove on :-(
Im going to rrderve an new appointment . They told me to drive a bit more
I wanted to lent another demo 992 to se if i could hear the same on that bit of road at home, but didnt had one for the moment
Thank you i might say
Exactly what i hear, one knock . It can go from side to side when the Car goes over . It is anoying this sound. And only i very lowe speed and sharp edges
Unfortunately the Porsche guy who runned with me didnt hear it on that road we drove on :-(
Im going to rrderve an new appointment . They told me to drive a bit more
I wanted to lent another demo 992 to se if i could hear the same on that bit of road at home, but didnt had one for the moment
Yep sounds the same. But for me it is not only in slow “bumps”. But also in spirited driving when going over a low speed bump. I mean those speed bumps you can easily take with 60 km/h. But nothing in between it seems.
it annoys me quite a bit haha
about recording, I doubt you can capture it.
One thing I did notice, when I hit under my front bumper with my hand I do hear something “metallic” behind it which seems almost loose resting on the inside. I wonder if this is making the knocking sound. As in, it “jumps” on the bumper inside when going over a bump at just the right speed, if that makes any sense.
If you haven't sorted this yet, you might want to call Porsche about the safety recall on the 2020 911 Carrera S. I'm taking delivery in a couple weeks and hope they have this fixed BEFORE they hand me the keys.
I don't have a 992 - but that does not sound normal for any model. It sounds like something is loose and knocking around, but something that is still attached so it bounces around the same way with each bump. Did you play that recording for Porsche?
08-22-2019, 06:46 AM
Knocking sound
Called the service center and told them. They told me drive a bit more and se if it gets worse .
