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dt4
Silverstone


Joined: 16 Mar 2016
Posts: 122
Location: Leeds


PostPosted: Wed Nov 21, 2018 5:11 pm    Post subject: Knocking from front offside suspension Reply with quote

I found the anti roll bar boot had split on the top joint so replaced the drop link but still have the knocking
It tends to go away after a few miles of driving but returns each fresh journey
What is the usual cause, top mounts or lower control arm?

cheers
 
  
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14490
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Nov 21, 2018 5:35 pm    Post subject: Reply with quote

Anti roll bar bushes. Check you've nothing in your frunk rattling around Grin
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2000 Manual 996 C4 Arctic Silver Convertible


 
  
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dt4
Silverstone


Joined: 16 Mar 2016
Posts: 122
Location: Leeds


PostPosted: Wed Nov 21, 2018 7:13 pm    Post subject: Reply with quote

alex yates wrote:
Anti roll bar bushes. Check you've nothing in your frunk rattling around Grin


I'll give it a going over but I didnt find any play it in the arb when I did the drop link
Dafter things have happened than the suggested stuff rattling around so Ill empty it before the next test drive lol
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 14490
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Wed Nov 21, 2018 7:16 pm    Post subject: Reply with quote

I once had a small fire extinguisher in there when I went on holiday. For the first 2 days of my holiday I was panicking something was wrong........until I realised what it was. Embarassed
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dt4
Silverstone


Joined: 16 Mar 2016
Posts: 122
Location: Leeds


PostPosted: Thu Nov 22, 2018 8:44 pm    Post subject: Reply with quote

`I cant see any play in the arb and bushes and cant see anything untoward in the lower arm arm ball joint

With the wheel off the ground and unloaded should the top mount rotate when the nut on top is turned?
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5563
Location: Brighton


PostPosted: Thu Nov 22, 2018 9:16 pm    Post subject: Reply with quote

If the knock is over bumps and sounds kinda like .. bonk .. bonk bonk bonk ..simlilar to a link rod then its the diagonal arms .. roughly 50k miles and these start to knock like this ..

You wont feel anything wiggleing the wheel top to bottom or side to side .. its an annoyance and not a problem as such .

If this noise but far louder then its anti roll bar bushes .

To have a better idea then i really need a sound clip im afraid .

Top mounts wear .. you turn them lock to lock and look at the rubber section (in the arch ) .. you will see if its debonding .. dont cause a noise as such though .. top shock nut loose will though .
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Mechanic

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dt4
Silverstone


Joined: 16 Mar 2016
Posts: 122
Location: Leeds


PostPosted: Fri Nov 23, 2018 7:46 am    Post subject: Reply with quote

deMort wrote:
If the knock is over bumps and sounds kinda like .. bonk .. bonk bonk bonk ..simlilar to a link rod then its the diagonal arms .. roughly 50k miles and these start to knock like this ..

You wont feel anything wiggleing the wheel top to bottom or side to side .. its an annoyance and not a problem as such .

If this noise but far louder then its anti roll bar bushes .

To have a better idea then i really need a sound clip im afraid .

Top mounts wear .. you turn them lock to lock and look at the rubber section (in the arch ) .. you will see if its debonding .. dont cause a noise as such though .. top shock nut loose will though .

Thank you
Ill continue to investigate
 
  
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dt4
Silverstone


Joined: 16 Mar 2016
Posts: 122
Location: Leeds


PostPosted: Fri Nov 23, 2018 7:16 pm    Post subject: Reply with quote

Actually mine sounds similar in description to this issue
http://911uk.com/viewtopic.php?p=1445111#1445111
 
  
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deMort
Zolder


Joined: 21 Mar 2015
Posts: 5563
Location: Brighton


PostPosted: Fri Nov 23, 2018 7:18 pm    Post subject: Reply with quote

Erm .. thats a link to this thread ?
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dt4
Silverstone


Joined: 16 Mar 2016
Posts: 122
Location: Leeds


PostPosted: Fri Nov 23, 2018 8:32 pm    Post subject: Reply with quote

Ooops lol
Sorry, http://911uk.com/viewtopic.php?t=131114&highlight=

I'll try and get a sound clip but appreciate its really difficult to diagnose these things from a distance
I suspect it will end up going to the nearest recognised outfit which is Revolution
I was hoping to be able to sort it myself so will keep at it for now
 
  
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