A1 service from Audi

[SR71]

c) inspection with an endoscope and witnessing scoring in the cylinder bores.

I'll ask again, what is responsible for the scoring on the bores?

[jackwood]

No idea. But my car was a demonstrator, sorry "Brand Managers" car, when I bought it, so god knows how it had been treated in the X-thousand miles before I recieved it.

[Gazzer68]

Mine had the scoring as well, all audi would only say, is that the marks were like a blemish. Almost like a coating on the bore, had started to come away.

[Terry1948]

This happened to a BMW I had and they fitted a new short engine it was blamed on the sulphur content of our fuel.It was difficult to start and used a lot of oil.

[Gazzer68]

Just an update
Now at 500miles since new engine, and oil still nice and clean.
Interestingly, the car burns no oil and shows no smoke.
Bloody hell doesn't it go ! and i'm not taking it over 6k and no full throttle, as per running in guidelines.

[aidanjaye]

Mines just past 30K miles and doesn't seem (touch wood) to ise any oil - none in the last 3000 miles anyway.
Previous owner was an older gentleman, treated car nicely and never ripped the tits out of it......maybe coincidence but maybe the RS4s need a little bit more running in than other brands?
Then again, I could be talking b**locks.

[UNI555]

I don't know anything about the previous owner of my car but it doesn't use oil or produce smoke either (24k miles, of which I've done about 4k) and the longer this continues the more curious I am about it, given that by all accounts nearly all RS4's do both.

[Gazzer68]

Maybe it's down to how its run in?
Manuals quite clear, DO NOT use full throttle till youv'e done 2500km
Up to 1000km do not rev over 6000rpm, between 1000-2500km do not exceed 7000rpm

[ArthurPE]

Ok, so just been to viw my RS4 (circ 27k miles), with the new engine semi installed.

The inlet manifold and old engine looked remarkably good. No furry carbon buildup ala Pippyrips, and no oil streams running out either.

All that could be observed on the inlet manifold as well as the valves was a light dusting of soot, very fine, and very smooth, with no measurable depth to it.

Clutch replaced, but the 'old' unit showed only approx 15% wear.

no valve deposit at 27k miles? nice

clutch was only 15% worn at 27k miles? ... wow, that's an extrapolated life of 180k miles...it's safe to say these clutches are good for 100k easy...
or you are the best 'clutcher' in the world

[ArthurPE]

Vindication for the sensible use of RR's perhaps inspite of the vociferous objections?

But what we really want to know is why Audi have replaced the engine?

If it is not the carbon build-up and there were no other obvious faults, what do they know that we don't?

the objections were not related to the 'sensible' use of a dyno...

nor were they vociferous...that would apply more to the defense of their 'proving' Audi over rated the engine and ALL stock engines are way down on power...and the only way to 'fix' it was aftermarket software...

P_G's results prove otherwise...his car made 396 with a faulty intake flap, if i understand correctlly...once fixed should make rated...

if they replaced his engine there was more than some carbon build-up...

[SR71]

You either do or don't believe the dyno figures...

Nobody has proved anything over a statistically significant population sample, except perhaps, RI_RS4, who has demonstrated that RLI oil reduces wear in this engine.

The Paramount Day was, IMHO, indicative though. I'm sure Jim & Rob would be sceptical if you suggested their cars were running ~450-470hp...

Still I (amongst others it would seem) have lost interest in that debate.

I suggest you can make any RS4 smoke by starting it repeatedly in a short space of time...

What I/we want to know is whether the contamination in the inlet is causing the/some damage in the cylinders?

Where else could it be coming from?

[ArthurPE]

You either do or don't believe the dyno figures...

Nobody has proved anything over a statistically significant population sample, except perhaps, RI_RS4, who has demonstrated that RLI oil reduces wear in this engine.

The Paramount Day was, IMHO, indicative though. I'm sure Jim & Rob would be sceptical if you suggested their cars were running ~450-470hp...

Still I (amongst others it would seem) have lost interest in that debate.

I suggest you can make any RS4 smoke by starting it repeatedly in a short space of time...

What I/we want to know is whether the contamination in the inlet is causing the/some damage in the cylinders?

Where else could it be coming from?

it's not black and white, they are not performed in a vaccum
you 'interpret' the data, objectively, based on conditions and the results, as compared to other known data...

have multiple engine been disassembled and mic'ed? if not, nothing has been 'proven'...

I never inferred that those cars produced 450+ HP, only that the other data was suspect...who knows what theirs produced...

the fact that some members who tested on that day, have found 50 HP, tells me something was not quite right...ramp rate, correction factors, etc.

oil ingested into the motor may lessen wear...not exasperate it...
could be poor fuel quality...
could be fuel additives
an assembly issue
a break-in issue
non-approved oil
not following warm-up procedures

[rs4_avant_7]

Gazzer I have sent a PM, cheers.