Audi C6 S6 v10 Info Dump

[dzow]

This injector change was with the Previous owner.
I have a bill from a Bosch specialist where the car was because it was running rough. They then switched injector 8 and all the spark plugs after troubleshooting everything. A few days after this bill I have a second bill for the 9 other injectors (last owner had a company with a truck repair of its own therefore there are 2 bills).

The first bill isn’t totally clear since they ‘cleaned’ the engine but it doesn’t say what method.

That’s why I’m considering a walnut blasting but I wanted some advice first because they charge me 800€ here to do it and the only reason is the consumption that seems high.
Other then that no codes whatsoever.

[Blackslide]

Sorry, as forum newbie, I was not allowed to reply straight away. In my case consumption depends heavily on driving. I was hypermiling and actually got it momentarily under 11.4, but it went back up to around 12 after a few “spirited” passes. Around town it gets worse, even when trying to be decent.

My average for about 5000km is around 16,5L/100km, over half of it is highway driving (quite heavy on the gas pedal mostly)

[Revolv0]

Can aftermarket suspension options be discussed in more detail?

[Littleal]

2008 Audi S6, second owner, 95,000
Took the chance and so far has payed off, alough I did notice there was some oil drops
I took the plastic cover off and it looks like it is starting from the front, any ideas

[justincredible]

Oil leaks are a very real thing with the 5.2 if the maintenance isn’t up to date.

Generally the two major sources of oil are from the valve covers and then from the oil filter housing O rings. when the O rings leak the oil goes into the motor valley and then come out the drain holes in the front of the block

[Littleal]

It is coming from the front(looks like what you are talking about)

[Littleal]

[justincredible]

I can search later when I have time and help shown more documentation… Feel free to make a standalone thead on this and your introduction. There are many pictures and members who have all had this as a normal thing.

[laketahoequattro]

My belly pan looked like that. It was the figure 8 and sandwich flat gasket under the oil filter housing filling up the space under the IM full of oil. Dripping down the front

[Macsaudi]

Spacers for the intake manifold. Man I know there are zero mods for our S6 c6 . So I started fabricating things. AL Spacers I got the idea from jhm.

[justincredible]

There are tons of mods for the S6

There is a 2.75 exhaust
ECU tune
TCU tune
LW crank pulley
Intake spacers
LW rotors

[laketahoequattro]

I chose the v10 so I wouldnt have an endless list of mods to do to it. Get in and go

[DC-S6]

I have a question, wondering if any other C6 owners experience what I am.
Under hard acceleration near WOT my car will consistently lose power momentarily around 4500-5000rpm. I have wondered if the manifold is not functioning as it should?
Also, sporadically under the same throttle input the car will surge and accelerate for a brief moment(seemingly not matching how much throttle I am applying). Fuel pumps?
Any thoughts would be appreciated.

[justincredible]

I would always start with are you getting any stored codes.

The pause in power in that range could be the intake as thats when the flaps activate for the TQ change over. But also people see fuel related or 02 related issues.

You can always log the fuel side to see. Is this something repeatable over and over.

[DC-S6]

Thank you for the response!
Yes it a consistent thing I have noticed since I bought the car.
I am waiting for a VCDS from Ross-Tech, would that be sufficient to look into any fuel pressure or IM codes? I would to scan the car and get a baseline.
The car runs great than this though and its the only V10 S6 in here, beautiful car and the low end torque is in the big block territory!
Thanks for your help and I will send a message when I get a scan done.
Cheers

[laketahoequattro]

Has anyone replaced the hose 07L103217B? Mine is broken where it connects to the intake so am replacing.

When I blow thru the MAF side I confirmed the check valve is working.

Being it was broken at the intake hose connection, I can assume the measured air thru the maf “may” have not helped the cold start misfires

[jludt]

I replaced this with the OEM part last winter - pretty much replaced all components of the PCV that I could reach at that point. Hope this solves your issues with the IM leaking!

[Dlugi11]

DEVASTATED Audi S6 5.2L V10 Engine Teardown. YOU CAN'T POWER THROUGH THAT! But Yet Here We Are.

Yet another BXA catastrophic failure

[DC-S6]

I actually watched that very video last night, no real cause was noted.
That was a severely damaged engine!
I have never seen damage like that.

I can see why practically everything is an engine out job.

[troberts]

P1057 code on my 2011 Audi S6– any ideas?

Also, looking to get decatted/headers mostly to reduce heat soak and keep the engine bay cooler (performance a plus). I can’t find any products online, where to buy?