Audi A6 2.0 tdi rattle from engine

**Whippy53** · 01-03-2016,09:44 PM

Sounds almost like the pulley but in sure they will have checked that, strange.

**g_freight** · 29-03-2016,06:42 PM

I have an 2004 s4 with a rattle problem ones warm..
I found a video with exactly same noise,does anybody knows what it is?
Pls let me know!
start.MOV - YouTube

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**bloto22** · 02-05-2016,11:45 PM

have you manage to get away with rattling in yours a6 ultra ?

**mits** · 27-01-2017,09:32 AM

I get a very small rattle, like two small metal plates clapping against each other rapidly (sorry that's the best I can explain) I will upload a video later. It's coming from the driver side, and more profound towards the front driver side wheel. This is regardless of cold starts/days. Even after driving 25 miles and being idle it's still there. When I'm driving and it's in gear, it disappears. However, when it biting point and reversing up a slight incline you can hear it then as well. It can be intermittent, each time I've been into Audi (twice) it doesn't do it! So annoying. Anyone have any ideas?

Audi A6 C7 2.0 TDI Ultra (Reg Sep 2015)
MMI Navigation Full 4G Touch
Parking System plus with automatic boot release
Full Matrix LED Headlights with headlight washers
Heated Windscreen washers

**Dutch Paddy** · 08-02-2017,09:33 PM

My very fresh A6 Ultra with now nearly 5K kmtrs on the clock also makes an additional noise on cold idle coming from the front of the engine, drivers side. It's like a hollow popping noise but it does go one the engine is warmed up. A mate of mine also on here has the same with his 2015 A6 Ultra. I'm just going to wait till the first service and leave them the car in the evening so they can start it from cold and check for themselves. The rattle from the rear is now fixed after they dropped the tamk and fixed in place whatever was loose.

**Silane** · 09-02-2017,11:11 AM

Haven't had this problem on my A6 C7, but had it on a Ford Focus before, it was the heat shielding around the exhaust hitting off the exhaust. The heat shielding is very thin metal, pushed it back from exhaust by hand and problem solved.

**Dutch Paddy** · 20-03-2017,01:54 PM

Happened to be out for a run with my local garage man yesterday and after we returned I started up the care for him to hear the noise I previously reported. He was very surprised at how noticeable it was and he agreed that it definitely should not be there. He contacted the Audi dealership this morning and they are to get back to him. It looks like a 2 hour trip to drop the car in for an inspection. I've taken a short video which I'm uploading so they can investigate that as well. I'll share the link on here once it's up.

https://youtu.be/slfHUPHTcm4

**dtwort** · 24-03-2017,07:17 PM

My MY17 with only 4000 miles on the clock makes exactly this noise when it's cold too. I've got it booked in at the dealer for 2 weeks time but I'd love to know what diagnosis you get when yours goes in.

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**Dutch Paddy** · 27-03-2017,06:54 PM

Mine was collected today, hopefully will know more later this week...

**Dutch Paddy** · 28-03-2017,03:08 PM

Just received a phone call from the workshop manager at the Audi Dealership. There is a notification (TPI he called it) with sound example on the Audi Technical Support for Dealers website which states that this sound is coming from the rotor in the vacuum pump which goes away when the coolant reaches roughly 60 degrees Celsius. Another way of 'killing the noise' after start up is to pump the brake pedal several times. Audi specifically mentions to not replace any components as it would have no effect. So basically they are saying it's a design related noise that is supposed to be there and is perfectly normal, nothing to worry about.