Audi C6 S6 v10 Info Dump

A6 All/ S6 All
#9

If you type “audi broken camshaft” into google, you get a few hits. Nothing at all for the Audi v10 (and none for the S6). And I have never seen any reports of it personally, after doing many hours of reading up on these cars.

If there were actual first-hand reports, then the first thing would be to determine why the camshaft broke. Was it due to failure of another component first, user modification or abuse, salvage or rebuilt title vehicle, an issue with the camshaft design itself, or unknown. So, until we get the reports to try and figure out what actually happened, then I would not be able to include it.

When I writeup the BAD it will strictly include known issues with validated, widespread, first-hand owner or mechanic reports. For example, carbon buildup. We know that is a major issue with these engines (and a bunch of others).

When I get to Areas of Concern section, which will be a list of things to check to ensure your car is in tip-top shape, I think what we are going to see is that the majority of the things that go wrong on these cars, and lead to a degradation in performance, are due to a lack of carbon cleaning during the first few years of ownership, or thereafter.

#10

Validated information on all accounts, good and bad is really needed. Great start, great looking car.

#11

Thanks CV, and good point.

I’m going to edit the 1/4 mile references, since they come from magazine reports, and not actual track reports. Until we get some actual ones from the track, we will have to treat the 1/4 mile times as unknown. I know that my car was no where close to 13 seconds, or even in the 14s on an unofficial test.

Anyone with timeslips from the track for these cars, please let me know.

#12

Let’s go to Cayuga in October or November. Will you be stock?
. Also it might be helpful to add the usd msrp information in your great op

#13

I’m down for Cayuga in the Fall !!! If I have the car back by then, that is.

But, I dont think the car will be stock. It is currently in CV’s hands getting the full JHM treatment. Hopefully, Ill have it back by October/November, but it is impossible to tell until we are further along in the project.

Good idea on MSRP. Ill track it down and add it.

#14

Oh it’s getting some JHM stuff done already? Cool. It will be a shame for my rs4 to have to rape it and annoy CV.

Maybe we should go to Sparta or st Thomas I think it’s now called. Half way between us and Detroit. Would be cool if CV’s new B6 is up and running too.

#15

Yeah, if we can all go together I am definitely in. CV and I already talked about a possible group trip to the track in the Fall. For me, It just depends on the car at this point. There are a lot of variables in the project, so this early on it is difficult to say when it will be ready. We are aiming for three months, but very hard to tell. Worse case scenario, I can always take the old C5 S6. My butt dyno tells me it is faster than the C6 (however, I think the C6 has a few undiagnosed issues to be resolved, along with carbon cleaning)

If you keep taunting CV enough, maybe he will throw a spare blower on the car just to make a point :slight_smile:

#16

We have been in this boat before with the B7 (JHM tuned) Vs Rs4 race :). The project won’t be started for several more week. We are waiting for some of the test results to come back and to make sure we look into some little issues the car has first.

#17

I have a thread on here I think about my friend’s S6. I did a carbon cleaning on it.

And I agree, the heat soak is horrible on these cars. Usually stock tunes are so neutered that they have room to compensate for heat soak. Not this car.

#18

http://audirevolution.net/forum/index.php?topic=230.0

Here’s your thread lol.

Maybe some IM spacers are in order… Can’t wait to see what happens with this car.

Oh and for some vintage AR content you can see some of tweets last posts before he went off the deep end.

Edit: The interiors on these cars look amazing, very modern despite being 7+ years old.

1 Like
#19

that’s because the A8 and A6 interiors cascade down to the A4 next generation. So if you want to see what your B8 S4 interior looks like, just go drive a 2007 S6. Or if you want to see what the B9 interior will look like, go check out the C7

#20

Thanks for the info, guys.

JHM is rumored to already have IM spacers ready for the v10 that are said to perform very well. From what I heard, they are in the testing stage at the moment.

#21

Thanks B6JoeS4 and Meistah… I added the link to the carbon section. Great first hand experience.

#22

S6 horror story

Owner buys used 08 S6 with 21k miles. Car is consuming oil. Has dealership run oil consumption tests and finds 1.8Qrts of oil consumed every 1000 miles.

Dealer investigates further and finds cylinder wall damage. Diagnosis: engine replacement needed

http://www.audizine.com/forum/showthread.php/592401-S6-v10-5-2L-Oil-Consumption?p=9907691#post9907691

#23

How terrible. I’d see if you can just get pictures from him and post them here.

#24

How are the pistons and rods made…cast? I think I read that up above

#25

Yes, I have messaged him about getting pics, and will post them here if he sends them.

Ill see if he has any info on the car history too.

#26

The study guide says forged rods and cast pistons

[b][i]Connecting Rods
The connecting rods are a familiar trapezoidal design
forged from 36MnVS4 high-strength steel. This
design reduces oscillating masses and distributes the
combustion force more evenly.
The lower end of the connecting rods are cracked after
forging. During the cracking process, the connecting rod
is split at a predetermined breaking point using a special
tool. The resultant unique breaking surface ensures the
high joining precision of the two mating parts.
The connecting rods are cross-drilled to allow engine oil
to lubricate the rod bearings and piston pins.

Pistons
The cast aluminum pistons are manufactured by the firm
Kolben Schmidt. They have a special piston head design
that supports the FSI combustion principle. The design
aids in the tumble effect of the fuel mixture during its
intake stroke.
The piston skirts are electro-coated with a special ironbased
friction reducing material to minimize wear under
load.
Spray jets located on the engine block provide cooling to
the underside of the piston and the piston pins.[/i][/b]

#27

great info there^^^

that’ll explain part of the cylinder wall scoring

Audi went with forged pistons on the 4.2 FSI RS4 and S5/Q7 engines, likely in part to help alleviate some of the scoring problems they had on previous NA engines.

#28

Interesting. I will do my best to keep track of how many of the S6’s this is effecting, and to what extent. There are very few stories of complete engine replacement being required, but many accounts of the S6 v10 consuming more oil then the average engine.

JE does make forged pistons for the R8 and Lambo 5.2 v10s, so they may work with the S6. They drop compression to 9.0, as they are designed for adding forced induction. If you already have damaged the cylinder walls though, these are obviously not going to help until you repair that first.

http://www.jepistons.com/Catalogs/Sport-Compact/Lamborghini.aspx
http://www.jepistons.com/Catalogs/Sport-Compact/VW-Audi/R8V10.aspx
https://www.youtube.com/watch?v=N1YcDnBvOT4

Ill have to ask CV if he has any more info on this. I think he mentioned that there is a way that minor scoring can be fixed, to a certain extent.

Also, I have heard that JHM is working on a resleeving program for the Audi alusil blocks. There is a sleeve kit for the Lamborghini v10s, priced at a cool $5k !!! Labor not included :slight_smile:

http://www.titanmotorsports.com/lamborghini-gallardo-sleeves.html