7.1 GT3 - Knocking Front Suspension
Discussion
Hi Guys,
has anyone else had a light knocking noise from the front of their 997 GT3 Mk1?
My car is driving me mad. Its been to Porsche on three occasions, and its still the same. They have replaced a top strut mount and a lower arm (650!) thankfully its all be under warranty, but its still the same.
Jjust really frustrating and inconvenient!
I think its a shocker, anyone else had similar problems?? Its coming from the o/s and only happens when driving slowly over poor tarmac. Town driving basically!
Its been there and progressively getting worse over the last 7000miles and 6months. I've heard people mention that they can be a bit 'clunky' at the front, but as the noise is only coming from the one side, but be abnormal.
I hope someone can help, for the sake of my sanity! And the local OPC, whilst being very nice and friendly have been on the whole completely useless.
PS: Makes a change from the many many GT3 Purchase threads of late
Stevie
has anyone else had a light knocking noise from the front of their 997 GT3 Mk1?
My car is driving me mad. Its been to Porsche on three occasions, and its still the same. They have replaced a top strut mount and a lower arm (650!) thankfully its all be under warranty, but its still the same.
Jjust really frustrating and inconvenient!
I think its a shocker, anyone else had similar problems?? Its coming from the o/s and only happens when driving slowly over poor tarmac. Town driving basically!
Its been there and progressively getting worse over the last 7000miles and 6months. I've heard people mention that they can be a bit 'clunky' at the front, but as the noise is only coming from the one side, but be abnormal.
I hope someone can help, for the sake of my sanity! And the local OPC, whilst being very nice and friendly have been on the whole completely useless.
PS: Makes a change from the many many GT3 Purchase threads of late
Stevie
Not uncommon :
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
The top mounts and TCA's seem to have issues which result in knocking/rattling noises. The other obvious items to check would be the anti-roll bar drop links and bushes.
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
The top mounts and TCA's seem to have issues which result in knocking/rattling noises. The other obvious items to check would be the anti-roll bar drop links and bushes.
Edited by Slippydiff on Wednesday 2nd November 08:33
Mine was doing it - at the service last month they diagnosed coffin arm bushes, but due to the low mileage tried lubricating - which seemed to work for mine at this stage (initial reaction was not covered as a wear and tear item - yeah right at sub 9k miles!).
It doesn't bother me too much as my Exige was terrible for it.
It doesn't bother me too much as my Exige was terrible for it.
As I have stated on the prices threads these cars are getting on a bit now
2012 is round the corner early cars were 2006.
The 996GT3 went though this and cars need a refresh which costs a few £
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
as for ARB bushes these only last 2 to 3 years any way and with all the speed bumbs and the bad UK roads a 5 year old car is going to need a full bush refresh imo.
2012 is round the corner early cars were 2006.
The 996GT3 went though this and cars need a refresh which costs a few £
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
as for ARB bushes these only last 2 to 3 years any way and with all the speed bumbs and the bad UK roads a 5 year old car is going to need a full bush refresh imo.
mrdemon said:
As I have stated on the prices threads these cars are getting on a bit now
2012 is round the corner early cars were 2006.
The 996GT3 went though this and cars need a refresh which costs a few £
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
as for ARB bushes these only last 2 to 3 years any way and with all the speed bumbs and the bad UK roads a 5 year old car is going to need a full bush refresh imo.
Now there's an invoice I'd like to see !2012 is round the corner early cars were 2006.
The 996GT3 went though this and cars need a refresh which costs a few £
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
as for ARB bushes these only last 2 to 3 years any way and with all the speed bumbs and the bad UK roads a 5 year old car is going to need a full bush refresh imo.
..mine used to do exactly this, PAX side only, used to drive me nuts, had it checked over as I was sure it was a bush somewhere, maybe droplink or in the turret top, but they were fine, so I assumed it was something in the strut.. if I had a passenger it was fine, only when that side was unloaded.., never got to the bottom of the problem...
mrdemon said:
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
...
surely the degredation in all these items are largely proportional to mileage covered and to a degree on the quality of roads driven on, rather than age....
Had a bad low-speed rattle on my 996 C2 recently and it turned out to be the lower wishbone. The drop link and top mounts were not the cause as they were replaced and didn't change the sound. I also had the coffin arms done, which cured a squeak.
mrdemon said:
As I have stated on the prices threads these cars are getting on a bit now
2012 is round the corner early cars were 2006.
The 996GT3 went though this and cars need a refresh which costs a few £
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
as for ARB bushes these only last 2 to 3 years any way and with all the speed bumbs and the bad UK roads a 5 year old car is going to need a full bush refresh imo.
Thank you for your wholly non-constructive post. Yes, my car is getting 'on a bit' and yes, it may need new parts from time to time. As will I the older I get 2012 is round the corner early cars were 2006.
The 996GT3 went though this and cars need a refresh which costs a few £
I expect 997 GT3 to need new bush sets, clutchs,rear disks (front should have been changed already ) and even shocks.
as for ARB bushes these only last 2 to 3 years any way and with all the speed bumbs and the bad UK roads a 5 year old car is going to need a full bush refresh imo.
What I am asking is if anyone has had similar problems and if so, what was the solution.
Thank you for everyones input so far, interesting (and quite relieving) to know that its fairly common, although still frustrating.
Stevie
Slippydiff said:
Not uncommon :
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
The top mounts and TCA's seem to have issues which result in knocking/rattling noises. The other obvious items to check would be the anti-roll bar drop links and bushes.
Thanks SD,http://www.pistonheads.com/gassing/topic.asp?h=0&a...
http://www.pistonheads.com/gassing/topic.asp?h=0&a...
The top mounts and TCA's seem to have issues which result in knocking/rattling noises. The other obvious items to check would be the anti-roll bar drop links and bushes.
Edited by Slippydiff on Wednesday 2nd November 08:33
meant to add - its worse if the car has been sat. If I've been using the car through the day it improves although doesn't go away all together.
I sell cars for a living and if someone came to me with that symptom, I would find it hard to believe ! But thats whats happening!
Stevie
My 996 which is the same suspension setup was exactly the same. Tried link arms double checked all bushes & top strut mounts etc.
Eventually replaced both coffin arms and is was sorted!
When you put the old arms in a vice gripping the front bush you could just feel a very slight movement & knocking, this is obviously amplified
when your driving with the noise transmitting through the alloy arms.
I repair cars for a living so get used to fairly annoying noises on customers cars been very slight movement in certain joints / bushes.
Total repair time to replace both arms was less than half an hour cost was just over £100 plus vat for both arms!
Hope this helps
Eventually replaced both coffin arms and is was sorted!
When you put the old arms in a vice gripping the front bush you could just feel a very slight movement & knocking, this is obviously amplified
when your driving with the noise transmitting through the alloy arms.
I repair cars for a living so get used to fairly annoying noises on customers cars been very slight movement in certain joints / bushes.
Total repair time to replace both arms was less than half an hour cost was just over £100 plus vat for both arms!
Hope this helps
Keep it Lit, sorry but Stevie is right - I recollected it wrongly, it was actually quoted to me as 650 quid per side, not a pair as I said earlier.
I almost choked on their rather super coffee when they trotted that one out
When I said "but that is all covered under warranty", they knee jerked into clause 4.2.3.1 sub section c (I made that up), Wear and Tear.
They did agree to pursue it with Reading, if the lubrication failed, based on the car only having done 8800 miles at the time.
I almost choked on their rather super coffee when they trotted that one out
When I said "but that is all covered under warranty", they knee jerked into clause 4.2.3.1 sub section c (I made that up), Wear and Tear.
They did agree to pursue it with Reading, if the lubrication failed, based on the car only having done 8800 miles at the time.
Hi Stevie
I had this problem almost exactly. OPC were very good in that they had it in at least three times and replaced several expensive parts under warranty before eventually concluding it was a shocker and replacing that. One of my symptoms was that it only happened after a worthwhile run (presume oil warming up in shocker) so was not replicated as easily as it might otherwise have been.
Steve
I had this problem almost exactly. OPC were very good in that they had it in at least three times and replaced several expensive parts under warranty before eventually concluding it was a shocker and replacing that. One of my symptoms was that it only happened after a worthwhile run (presume oil warming up in shocker) so was not replicated as easily as it might otherwise have been.
Steve
Hi Stevie,
looks like most things have been checked or changed. Hopefully the torque of all the suspension bolts etc have been checked especially the top link arm bolt.
The only other thing I can think of would be play in the front strut piston top bearing.
Not easy to check though especially fully assembled and not common on Porsches, fairly common on French marques and some Fords!
Try Jacking the car up under the coffin arm and get someone to rock the road wheel from 12 to 6 as hard as possible while feeling for movement between the piston & strut body. This would explain why it's worse when it's been stood as the damping fluid has settled down.
So try this after it's been stood a while. Otherwise you'd have to remove the strut & coil spring to check properly!
Ok for me to say cos I have a garage & mechanics......so easy to do,a Porsche dealer might not not go to such lengths for free.
Good Luck shame you don't live closer I'd take a look for you.
looks like most things have been checked or changed. Hopefully the torque of all the suspension bolts etc have been checked especially the top link arm bolt.
The only other thing I can think of would be play in the front strut piston top bearing.
Not easy to check though especially fully assembled and not common on Porsches, fairly common on French marques and some Fords!
Try Jacking the car up under the coffin arm and get someone to rock the road wheel from 12 to 6 as hard as possible while feeling for movement between the piston & strut body. This would explain why it's worse when it's been stood as the damping fluid has settled down.
So try this after it's been stood a while. Otherwise you'd have to remove the strut & coil spring to check properly!
Ok for me to say cos I have a garage & mechanics......so easy to do,a Porsche dealer might not not go to such lengths for free.
Good Luck shame you don't live closer I'd take a look for you.
Gassing Station | Porsche General | Top of Page | What's New | My Stuff