DRC Recall in US/Canada

[rs4v8]

Mine has been in twice for DRC repairs, and there were two other RS4's at the dealer on one occasion, and at least one of them was also in for DRC. (I asked) Add to that the comment of, "they are always in for that" from the MT - I'll make up my own mind on how big the problem is.

99.99997% of us have too!

[Sims]

Mine has been in twice for DRC repairs, and there were two other RS4's at the dealer on one occasion, and at least one of them was also in for DRC. (I asked) Add to that the comment of, "they are always in for that" from the MT - I'll make up my own mind on how big the problem is.

99.99997% of us have too!

so who is in the 0.00003? Audi are with us.

[rs4v8]

Mine has been in twice for DRC repairs, and there were two other RS4's at the dealer on one occasion, and at least one of them was also in for DRC. (I asked) Add to that the comment of, "they are always in for that" from the MT - I'll make up my own mind on how big the problem is.

99.99997% of us have too!

so who is in the 0.00003? Audi are with us.

Come on Sims! Do you really need to ask that?? Think about it chief!

??

??

[ArthurPE]

first, you need to simmer down, you're froathing at the mouth

no u-turn, rhetorical
t's closer to 0% than 100%

all hydraulics leak...
ever seen an excavator or been in a factory?
oil everywhere...
it's natural...that is why the TSB says it is 'natural'

not the whole arguement, I only called them yesterday...out of curiosty
not one replacement...
I'm basing it on what Audi says... <1%, considerably
why don't you ask them the failure rate?

you amuse me, as in funny, 'ha ha'

I'll take Audis numbers over an internet poll
you do what you like, but calm down, stop being cynical/mean, or YOUR hydraulics are going to blow

Holy <beep>! Is this something approaching a U-turn?

Yes I have, on two separate occasions. The oil spills out on the floor and over the driveshafts / suspension. Rears leak and fronts leak. Immediately afterwards the car clunks and bangs loudly. The rears sound like a loose golf club's head hitting a metal surface inside of the boot / trunk.

Normal operating condition of a system with a flaw. Shocks shouldn't fail like this Arthur and your car will be put off the road in the UK because of it come MOT time. Furthermore, my car failed twice as mentioned with pools of oil underneath. 'Weeping' is the beginning of the end AND what happens immediately after you realise your car is dead - again

Ha ha! I just read this again!! You're basing your whole argument on approx 10 cars and what four dealerships have told you they have experience of and ordered parts for??!! Seriously?? How on earth can someone with an engineering background possibly (seriously!) extrapolate this to a worldwide model run? AND have the audacity to criticise anyone who uses 133 independent reports as a basis for analysis? You're joking right? Is this all you have?

[ArthurPE]

it is fact, even though you don't believe in it...
they will have my 'guts for garters', are you for real? lol
much anger in you, very little knowledge or humor, try to reverse that...

you wouldn't know a fact if it hit you in the ass...
you are all hyperbole, misdirection, misinformation and hogwash...
you have has many posts as me in 5 months, as I do in 20
and they are all divisive, or one line personal insults, or useless
get a life...seriously

RS4v8, this guy is irrelevant. He posts rubbish on this UK forum because he can get away with it. He is very careful on what he tells his fellow Yankees for they will have his guts for garters. he would be the laughing stock of US Audi forums if he mentions on there what he mentions here. He still has not posted this thread on the Audizine forum, wonder why? He says he did not post the recall letter on here because it's a US issue - how credible is that when he posts non Audi, non motoring stuff on here. It was Petrol_Dave who did the right thing by posting this key issue on here forthwith.

All cars have issues (we can all provide lots of examples of BMW's Porsche, GTR's ), and we can all acknowledge & accept that and be constructive about it and still appreciate the package. It's about context.

Arthur was a diehard BMW fan for 2 decades at least till he fell out with them and there was litigation. So he switched his allegiance to Audi and will now defend Audi regardless of the facts.

Really we are wasting time on this guy whilst he remains in denial mode.

Clearly we are all disappointed it has taken so many years for Audi to sort out the the DRC issues, and I am sure they are not proud of their record on this. But progress is being made for the extent of the problem has been acknowledged by Audi.

[ArthurPE]

so who is in the 0.00003? Audi are with us.

you represent Corp. Audi?
really?

you get your 'recall' letter yet?

[^Qwerty^]

all hydraulics leak...
ever seen an excavator or been in a factory?
oil everywhere...
it's natural...that is why the TSB says it is 'natural'

I think it's already been quoted on here, but if the hydraulics leak on a vehicle in the UK, you (should) get an instant MOT failure, some testing stations would even fail a vehicle for weeping, never mind the 'oil everywhere' scenario quoted above, which to be honest, is ridiculous in the context of a car you would buy from a manufacturer, Audi or not.

Also, I don’t think it’s correct to compare the two systems. If you sit in a JCB and pull the levers, sweet FA happens until you start the engine. Once the system is pressurised, you can move the bucket around and dig pretty holes. If the system looses a bit of oil, then it doesn’t matter, because the header tank keeps everything topped up. On the other hand, I understand DRC is a sealed pressurised system, so any leaks of pressure are final, and the only means of putting pressure back in to the system are to take it to the dealer. From memory, the system is at 12Psi and 8PSi rings a bell as to when the knocking starts and the system needs recharging and/or a shock needs replacing.

[Sims]

it is fact, even though you don't believe in it...
they will have my 'guts for garters', are you for real? lol

So you have now posted on Audizine have you? Any other US Audi forum or are you not welcome on them?

much anger in you,

so tell us how many other forums you have been banned from for foul language and extreme views. Your starter for one is to do with Audio

you wouldn't know a fact if it hit you in the ass..

so tell me again how many cars worldwide are affected by DRC. is it 0.01% or less than 1% or closer to 0 than 100. You claim you have Audi connections so also tell us how many RS4's sold in Germany. You claimed it was 17,000 [/quote]
.

you have as many posts as me in 5 months, as I do in 20

I would have thought you have got this simple one right at least. Facts & Math is not your suit. 1449 is not as many as 1238.

and they are all divisive, or one line personal insults, or useless
You are all hyperbole, misdirection, misinformation and hogwash...

Care to give me examples. Oh we tried that before, and you did not get at all far. Arthur calm down, you have lost credibility by your denial of everything & abuse you can only get away with on this non-moderated forum

[lengster1]

Qwerty you are spot on,I drive an rs4 that i peel into high speed corners with not dig holes,two completely different systems to do two competely different jobs,most importantly the DRC is a sealed system,All of this 2" of damp area around your strut top is acceptable is utter rubbish,its only acceptable by an audi dealership that is quite rightly worried it will not satisfy audi uk when it comes to getting paid for the warranty work.

Arthur you come from a state that sues people for millions for coffee being too hot,Do you honestly think an audi dealership is going to volunteer failure rates openly given the high likelyhood of being sued for millions,Perhaps the US has roads far less demanding in general than the uk,it is after all well known for building huge gas guzzling straightline monsters as it suits the roads out there.

Im not for one minute calling you a liar,im just saying stand back and look at the bigger picture,for me there is already enough proof on this forum alone that in the UK we have a significant failure rate,audi i feel accept this and have put a measure in place which i believe to be reasonable but perhaps not ideal

[^Qwerty^]

Actually if anybody is fond of mathmatical formula to prove something one way or another, it would be quite easy to to work out how much oil loss needs to occur in a DRC system before the pressure drops from 12PSi to 8PSi, at which point the system starts knocking? (Clue - it's not a lot)

[ArthurPE]

Actually if anybody is fond of mathmatical formula to prove something one way or another, it would be quite easy to to work out how much oil loss needs to occur in a DRC system before the pressure drops from 12PSi to 8PSi, at which point the system starts knocking? (Clue - it's not a lot)

actually a spring (variable rate) dampened by a fluid shock thru an orifice with a pressure reservoir would NOT be an easy system to model...

the pressure is actually 16 bar to 12 bar (235 to 176 psi) afaik
I'm sure there is a natural variation with air/fuid temp too...

and it's the springs that carry the load, the dampers dampen the spring oscillation...

does anyone know the spec?
I know 12 bar is the NO GO low limit
I thought they were initially charged to 14 bar...but I've heard 16 too

[Mike_Bike]

that's what the accumulators are for, they use compressed gas to keep the system pressure up as the total volume changes due to displacement of the pistons in the shock absorbers. So you can work out how much oil you need to weep before the pressure will drop but you need to know the volume and the type of gas under pressure.

[ArthurPE]

that's what the accumulators are for, they use compressed gas to keep the system pressure up as the total volume changes due to displacement of the pistons in the shock absorbers. So you can work out how much oil you need to weep before the pressure will drop but you need to know the volume and the type of gas under pressure.

but the system volume doesn't change?
it's just transfered between the shock (and internally thru the orifice) and the accumulator...the accumulator diaphram making up the difference

the system takes ~2 liter of fluid...1 per set of dampers...

yep, accumulators are the pressure source since the fluid is essentially non-compressible

from what I can find
accum are made by KYB
the shocks are made by KW supposedly (but I've read KYB also)

since it appears the ideal Gas law is at play an assumption could be made: 10% fluid loss (10% Vol change)~ 10% pressure loss

[Mike_Bike]

the system volume must change, if it were constant when one shock went into bump it's opposite corner would raise by the same amount.

[Mike_Bike]

I suppose it depends on the ratio of the bore in the oil side and the gas side of the accumulator ... it could be one to one?