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Attached is a service interval list. It for MY 2014, but it should be mostly applicable to yours too.

It's the crank pulley that can fail. Not the actual supercharger pulley. As Dippy says, they can fail anytime, but usually give a knocking or rattle sound, sometimes a creaking as the 'rubber' insert part fails.

Most upgrade to a performance 'solid' pulley so this doesn't happen and you get more power. :)

A big oil leak!? Depends where it's coming from? Could be the garage that did the service didn't tighten something? Oil leaks are normally minor issues with seals/gaskets. It's abnormal noises and dahs warning lights that you have to be concerned about. If it was a big oil leak, you would see oil on the floor where you park you car?

Should have got some pics whilst it was up in the air. Never really trust a garage that says your car has a 'big oil leak'. You should get more info and where it is actually coming from and possible causes/fixes from the garage.
 

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Not sure if you will find a manual B8.5 S5 in the UK, never seen one, not sure if Audi did the manual in B8.5?
 

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Audi stopped producing manual gearbox cars in ROW (as opposed to NA) from 2012 facelift.
I thought so, just wasn't sure!
 

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Turned out to be the DSG oil filter housing had cracked/o-ring damaged. Must have been over-tightened on last DSG service they recon. Very cheap fix luckily - drives spot on ever since.
As I said :D Glad it wasn't anything more.

A cheap fix to 'reseal', but depends on much oil you lost @£20 per litre?
 

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Thanks for the info! Have you had the crank pulley replaced? If so, how much was it including labour?

I'm thinking of going MRC stage 2 in a few months. Assume that would be the time to replace the crank pulley as they'll be doing the supercharger pulley at the same time?

Cheers
I replaced mine with a CTS 187mm pulley way before my crank pulley was worn. I changed my pulley at 40k miles and it still looked like new, so I sold it to someone with a split pulley. :)

As you will see, I'm the king of DIYs on here and do most of the maintenance and upgrades myself, so can't comment on labour costs.

MRC are well recommended and will quote you inclusive of fitting the pulley for stage 2!

You don't normally change the supercharger pulley due to the crank sizes available now. It used to be the big pub chat to say, 'I'm dual pulley', but with loads of options and sizes for the crank, the SC pulley isn't touched or needed.
 
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I got my pulley from allstars motorsport in Portugal 3 years ago for £350 delivered. I know more recently they had offers of a very similar price. But you can spend more for top end stuff like the Fluidampr which has a viscous damper in it, Dippy has one of these.

I wouldn't advise the bolt over pulleys, like APR as you don't eradicate the potential pulley issue which is the OE pulley is left on and the drive for the SC is bolted over the top. The Aux belt will still run on the OE pulley..
 

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Yes, well, so long as you go stage 2 with a replacement crank pulley that is either the damped Fluidampr or a single piece billet alloy pulley, which most are in the aftermarket/tuning. :)
 
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Yes, that's the one! :)

At 100k miles, the pulley may have already be replaced? Is your car totally stock? Have you checked? :)
 

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MRC may not fit the CTS pulley, depends on what connections they have. I know they tend to fit the 189mm pulley for stage 2. But see what they say. :)
 

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AIUI MRC fit a 179mm pulley with a 1310mm belt for their Stage 2. Like @Dippy I'm using a 189mm Fluidampr pulley with a 1325mm belt, however I bought mine from AKS Tuning in UK rather than import from Canada direct myself.

MRC were happy to fit and Stage 2 tune with the pulley/belt I supplied but I got no extra gains over their Stage 2 tunes with 179mm pulleys.

179mm pulleys are available from Fluidampr.

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I'm a bit confused with this Dave. :) So MRC use a 179mm pulley for their S2?

I have a 187mm CTS pulley with, as you know, the 1310mm belt.

djsedo - Dippy, myself and HTB are all called Dave, so which ever Dave you chose for the info, you got it from Dave :D
 
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Spoke too soon. Leaking again!! 😞 This is my first Audi and will be my last at this rate!

Don't suppose you've dealt with a recurring gearbox leak during your ownership Dave?
I haven't had a recurring box leak. But where is it coming from? Wasn't it the filter housing? How was it fixed? Got any pics?
 

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Took it to an automatic specialist today. They said it's not that bad a leak (any more) and looks like it's coming from the oil pan gasket as there's no sign of leaks any higher up the gearbox. £150 to replace gasket inc. labour. I've asked them to do that plus a full DSG service as they'll be draining the oil anyway (so about £300 all in).

Will report back once done and put a few miles on it.

I did read somewhere that the oil pan can warp over time, causing leaks?
Great! Atleast that should be it fixed!

Haven't heard of oil pans warping! unless it's been removed before and put back on in a dodgy way, eg tightening the bolts all wrong. There will be a sequence and torque values on the pan bolts.
 
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