Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

4.2 V8 32v Naturally Aspirated - 414 bhp
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Turbomotorsport
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Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by Turbomotorsport » Wed Jan 30, 2019 11:53 am

Hello guys...i have big mistery with unusual knocking noise from the front left part of car..sometimes not everytime when driving across holes on a road i have clunking noise from somewhere in left..car have DRC suspension sistem and KW springs fitted on original apsorber lowering car about 3cm...possible problem? I work like mechanic so I ve looked all usual problems for this type of noise but i cant find nothing unusual...i looked tightness of every bolt on suspension,steering rack etc..everythings perfect,all silent block are new(original audi parts) ..but the noise still coming.... i m not really expert for DRC suspension sistem but that s only i can suspect for now.. sistem was never repaired or re-pressurized so maybe in this i have problem?Does anyone have siilar problem? Plz help me with this it driving me crazy :) :FIREdevil: :FIREdevil: :drink:

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pule333
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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by pule333 » Wed Jan 30, 2019 12:30 pm

Litteraly close your eyes and swap DRC for aftermarket (or new DRC struts). That’s you problem. If it never been repaired it’s the shocks.


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RS4 B7 aka Vinnie
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Turbomotorsport
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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by Turbomotorsport » Wed Jan 30, 2019 1:30 pm

Ok,tnx for information..so refilling/pressurise with new DRC fluid will not solve the problem? if i put aftermarket struts i need to close the pipes with something or just bleed sistem out?

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pule333
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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by pule333 » Wed Jan 30, 2019 2:37 pm

No it won’t. Most likely your lines are corroded.
They are mild steel. Thin wall. Car is 12+ years old.


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RS4 B7 aka Vinnie
AMD stage2|De-coked|GruppeM|CAF|Eibach arbs|BilsteinB14|Goodridge hoses|DS3000|phaeton brake ducts|Led tail lights|Trups DTRL|LED interior|JcWeldFab|034 motorsport endlinks, mounts and bushings|ECS Differential Mount|JHM short shift|JHM intake spacers|8/10mm H&R|R2D2 10" sub and AMP|Corbeau seats|4point harness

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pule333
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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by pule333 » Wed Jan 30, 2019 2:38 pm

Turbomotorsport wrote:Ok,tnx for information..so refilling/pressurise with new DRC fluid will not solve the problem? if i put aftermarket struts i need to close the pipes with something or just bleed sistem out?
Yeah just rip it all out. Won’t need them any more.


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ilya, photographer http://www.ikrylov.com

RS4 B7 aka Vinnie
AMD stage2|De-coked|GruppeM|CAF|Eibach arbs|BilsteinB14|Goodridge hoses|DS3000|phaeton brake ducts|Led tail lights|Trups DTRL|LED interior|JcWeldFab|034 motorsport endlinks, mounts and bushings|ECS Differential Mount|JHM short shift|JHM intake spacers|8/10mm H&R|R2D2 10" sub and AMP|Corbeau seats|4point harness

Shockerboy
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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by Shockerboy » Thu Jan 31, 2019 11:08 am

Turbomotorsport , The issues with the RS4 In the UK climate are the hydralic pipes linking the Shocks , they corrode badly particularly over the petrol tank . . the shocks them selves also give a lot of trouble . Quotes from Audi vary up to £4000 in the worst case . It is normal nowadays to replace with an after market kit , If you dont do lots of track days and like the look of the car, the KONI shock kit is the best bang for buck you can get , its been developed specifically by KONI and CRS to give a perfect solution. Search on this forum and lots of people rave about it . This kit will put the car back to NEW performance from the suspension with out breaking the bank . We supply fitting instructions and blank of caps for the pipes which we can be left on the car.. We also offer tips for the installation ( or can do the installation if convenient to you ) . Normal shocks wont work in the RS4 so be cautious what you buy. If you want a slightly lower stance H&R springs coupled to the KONI kit works perfectly and we pre adjust the dampers for max performance in this instant . If you want very low ? Coil overs are the way forward but the ride is harsh and speed humps become something of an issue to overcome with out breaking middle gear box mounting if you arent careful .

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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by Shockerboy » Thu Jan 31, 2019 11:11 am

My opinion, Some say repairing the DRC to keep the value of the car up and completely original is not neccessarily true , If i was buying one of these cars my biggest concern would be the DRC if it was still standard . Fitting quality equipment cant devalue the car !

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AlexB7RS4
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Re: Audi RS4 2006 4.2V8 front suspension problem(unusual knocking)

Post by AlexB7RS4 » Sat Feb 16, 2019 1:04 pm

Agreed Shockerboy, I'd be looking for a car with newish coilovers if I was buying. Disagree about the harshness though, my KW V3s are better than the stock DRC was in both ride and performance.


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