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APL911
Silverstone


Joined: 15 Aug 2017
Posts: 111



PostPosted: Sun Dec 03, 2017 3:05 pm    Post subject: 996.2 C2 wandering steering at motorway speed. Reply with quote

Hi all. Need some quick advice.

9excellence have done a great job on my car. However at motorway speeds my steering wheel moves and wonders around just to keep the car moving straight.

I had decided to change the front and rear control arms as 9E have said the bushes are shot. It looks like a fairly straightforward job, save any seized fixings...

Could this be the cause of this? (I know it’s hard to say with this small amount of info). Or is there something else the 996 is know for that could be causing this?

9E also did a full geometry set up, replaced the front shocks and top mounts and fit four new coffin arms.

Thanks

Antony
 
  
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EGTE
Montreal


Joined: 06 Jul 2015
Posts: 516



PostPosted: Sun Dec 03, 2017 4:27 pm    Post subject: Reply with quote

If the bushes are shot, that geo. was pretty much meaningless.

It'll be geometry out of whack as the bushes allow the tyres to move about.

Change them and re-geo.
 
  
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T8
General
General


Joined: 29 Jun 2010
Posts: 12948
Location: Kent


PostPosted: Sun Dec 03, 2017 4:34 pm    Post subject: Reply with quote

I'm reading it that you've had that work done.

If so, it could just be that your wheels need balancing.

EDIT: Actually reading it again I'm not sure what you've had done. Confused

If 9e did some of the work required and advised that other stuff needed doing why didn't you get them to do it Question
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APL911
Silverstone


Joined: 15 Aug 2017
Posts: 111



PostPosted: Sun Dec 03, 2017 4:45 pm    Post subject: Reply with quote

Simple. I didn’t have enough spare money to get them to do the control arms.
So I prioritised the coffin arms, shocks, top mounts and exhaust. Plus I should be able to do them myself.
 
  
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cobrars
Silverstone


Joined: 08 Apr 2013
Posts: 100
Location: Newcastle


PostPosted: Sun Dec 03, 2017 5:06 pm    Post subject: Reply with quote

Could something be loose ??? try checking the top mounts or bottom arm bolts ???

I remember years ago a friend of mind had an issue similar to that (not a porsche mind you) turned out one of the bottom arm bolts was a little loose... It was tight, just not tight enough...

If it wasn't doing it before then ring 9e and ask them to check, will only take 10 mins on a ramp.

Hope you get sorted Dont know

Craig
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APL911
Silverstone


Joined: 15 Aug 2017
Posts: 111



PostPosted: Sun Dec 03, 2017 5:11 pm    Post subject: Reply with quote

cobrars wrote:
Could something be loose ??? try checking the top mounts or bottom arm bolts ???

I remember years ago a friend of mind had an issue similar to that (not a porsche mind you) turned out one of the bottom arm bolts was a little loose... It was tight, just not tight enough...

If it wasn't doing it before then ring 9e and ask them to check, will only take 10 mins on a ramp.

Hope you get sorted Dont know

Craig


Good point. It was doing it before. Wheels are also not balanced, but that’s not the problem. From the sounds of it, it must be the control arm bushes.
 
  
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chriscoates81
Suzuka


Joined: 17 May 2013
Posts: 1007



PostPosted: Sun Dec 03, 2017 6:00 pm    Post subject: Reply with quote

Depending on when it happens, could possibly be Tramlining. Does it do it no matter which part of each lane you are on?
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paul987
Albert Park


Joined: 27 Feb 2015
Posts: 1644
Location: east mids


PostPosted: Sun Dec 03, 2017 6:20 pm    Post subject: Reply with quote

Track rods Dont know
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alex yates
Shanghai
Shanghai


Joined: 06 Mar 2014
Posts: 11342
Location: 4,000 holes in Blackburn, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Sun Dec 03, 2017 6:27 pm    Post subject: Reply with quote

If 9e have done some work on your suspension and now it's not driving right, shouldn't you just be asking them? Question
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APL911
Silverstone


Joined: 15 Aug 2017
Posts: 111



PostPosted: Sun Dec 03, 2017 6:38 pm    Post subject: Reply with quote

paul987 wrote:
Track rods Dont know


Good shout. I’ll change them too.
 
  
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APL911
Silverstone


Joined: 15 Aug 2017
Posts: 111



PostPosted: Sun Dec 03, 2017 6:54 pm    Post subject: Reply with quote

alex yates wrote:
If 9e have done some work on your suspension and now it's not driving right, shouldn't you just be asking them? Question


Not quite right. It was not driving right before it went to 9e. In their full vehicle check they recommended changing the control arms, but I could not afford it at the time. (£190+vat each). What I’m trying to figure out is if this could be the cause for the steering play and wandering at motorway speeds.
They didn’t mention the tie rods in their inspection, but they are cheap to buy and relatively simple to change out so I’ll plan to do them when I’m in there.
 
  
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cheshire911
Paul Ricard


Joined: 10 Jun 2012
Posts: 3475



PostPosted: Mon Dec 04, 2017 12:14 pm    Post subject: Reply with quote

It makes little sense to have geometry when there are worn suspension components. From the looks of it, you will have another geometry done when the other bits you mention are going to be fitted.

You could also consider Chris at Center Gravity - his approach to geometry is to carry out a thorough inspection of all the braking, suspension and steering components for wear and tear before doing anything with the geometry. You can be present throughout so will see first hand the state of all the bits.
Best way to contact is via their website. They may be a little far for you - they are based in Atherstone Warwickshire - I did a 200-mile round trip to have him set up my geometry and he has guys that drive from Republic of Ireland, Scotland and French Riviera to have their cars set up with his expertise touch.
Well worth it.
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wasz
Kyalami


Joined: 28 Dec 2012
Posts: 1865


1999 Porsche 996 Carrera 2

PostPosted: Mon Dec 04, 2017 3:14 pm    Post subject: Reply with quote

Geo is out either bad adjustment or bushes or ball joints or mounts are shot.

Mine was all over the place on the motorway when I replaced some bits myself before I got the geo setup, even though I did my best to put things in the original place of adjustment.
 
  
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