Ticking sound from drivers bank.

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
Post Reply
PeterB0304
Neutral
Posts: 7
Joined: Tue Dec 13, 2016 10:16 am

Ticking sound from drivers bank.

Post by PeterB0304 » Thu Dec 15, 2016 10:50 pm

Evening,

So went from big Jags to my first RS6 on Sunday and loving it, one issue i was hoping someone could point me in a direction for though.
There is a ticking sound that correspnds to engine revs as rev up but once you lift off it goes away untill its back to idle. I have ben round with the stethoscope and it is very audible through the secondary air pump even when the plug is removed.
Cant hear it anywhere elseand it is worse when cold and whilst it is quieter when warm it is still there.
I will get some pictures of the car up this weekend hopefully!
Only issue I do know I have is broken vaccum pipes all over the show which is Saturdays job.

Cheers
Peter

Ajc
4th Gear
Posts: 765
Joined: Sun Mar 27, 2016 7:27 pm
Location: Cheshire

Re: Ticking sound from drivers bank.

Post by Ajc » Thu Dec 15, 2016 11:38 pm

Welcome and FON,
Sai pumps are prone to failure however the fact that your tick corresponds with the engine rpm could kinda of steer me away from that a little . However always worth checking. Could it be a manifold or turbo gasket blowing ? Or is it more of a mechanical noise you can here ? . Could also be a noisy lifter I guess .But first thing to do is to get the vac hoses changed and see what you discover
Cheers Al

04 c5 rs6 , Ebony Black, Bare shell repaint , Milltek's, PSS9's,Hotchkis Arb's,Gutted precats, hybrid turbos, Bosch 044 ,And an annoying EML light

User avatar
Shoppinit
Cruising
Posts: 20285
Joined: Wed Dec 31, 2008 6:24 pm

Re: Ticking sound from drivers bank.

Post by Shoppinit » Fri Dec 16, 2016 10:26 am

Sounds like exhaust noise is coming back through the SAI piping, that's why you're hearing it there. Maybe the combination valve is failing and letting exhaust gas through the wrong way. They're a PITA to get to to replace. Well, one of them is, and you can be sure it'll be that one that's failing.

Presumably if it's leaking, it'll be admitting air into the exhaust stream, too, so you might be getting incorrect fuelling. It'll probably only get worse, so you might want to think about a SAI delete.

I think the combination valves require vacuum to open, so it probably isn't a vac leak, although it's always a good idea to check because leaks lead to all kinds of woes.

Also, FON and rule 1.

/Might be worth swapping out the N112, too. I guess that could fail in a way that would allow vacuum to partially activate the combination valves. You could test that by blocking off the vacuum pipes between the N112 and combination valves, but if the SAI system tried to activate when you are in that configuration you might get a MIL and you will need a Vagcom to reset it.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

PeterB0304
Neutral
Posts: 7
Joined: Tue Dec 13, 2016 10:16 am

Re: Ticking sound from drivers bank.

Post by PeterB0304 » Fri Dec 16, 2016 5:40 pm

Cheers guys and thanks already, i will update you hopefully tomorrow. Sorry one thing though what is FON?

Ajc
4th Gear
Posts: 765
Joined: Sun Mar 27, 2016 7:27 pm
Location: Cheshire

Re: Ticking sound from drivers bank.

Post by Ajc » Fri Dec 16, 2016 6:58 pm

Click on FON . All will be explained and an awful lot more :biggrin3:
Cheers Al

04 c5 rs6 , Ebony Black, Bare shell repaint , Milltek's, PSS9's,Hotchkis Arb's,Gutted precats, hybrid turbos, Bosch 044 ,And an annoying EML light

PeterB0304
Neutral
Posts: 7
Joined: Tue Dec 13, 2016 10:16 am

Re: Ticking sound from drivers bank.

Post by PeterB0304 » Sat Dec 17, 2016 1:33 am

Haha love it :jump:

User avatar
Shoppinit
Cruising
Posts: 20285
Joined: Wed Dec 31, 2008 6:24 pm

Re: Ticking sound from drivers bank.

Post by Shoppinit » Tue Jan 03, 2017 12:00 pm

You made any progress on this?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

PeterB0304
Neutral
Posts: 7
Joined: Tue Dec 13, 2016 10:16 am

Re: Ticking sound from drivers bank.

Post by PeterB0304 » Tue Jan 10, 2017 12:30 pm

Yes to some degree.

So SAI delete done to some degree, I didn't quite have the time to attempt to get down to the fixings for the valves(what a nightmare) so removed all the pipework and pump and just plugged the combo valves in situ I did have a peak at the fixings with an endoscope and there is no soot so I know they aren't leaking externally. Looped the vac pipe on the N112 valve and the engine light stays off. I was getting faults for both combo valves before which was explained when I removed the SAI pump and found it was full of water, reset the light with my free Carista App and bluetooth dongle.

Vac pipes all replaced when I did the plugs.

And still noise sadly so back to square one.

ALSO I will wash the damn thing and get better pictures but:

Image
Image
Image
Image
And with a mates XJR
Image

Post Reply

Return to “RS6 / RS6 plus (C5 Typ 4B) 2002-2004”

Who is online

Users browsing this forum: No registered users and 94 guests