question about a noise on start up

Post by **rs6_newbie** » Fri Sep 21, 2007 3:38 pm

hi everyone

just in the process of purcahsing my 1st rs6 03 plate with 55k full audi service

when i have started the car from cold it sounds like a plane has just started its engines

after a couple of mins this noise goes away

is this normal or is there a problem

any help on the matter would be great also is there anythng else i should be looking out for which could be a problem

thanx inadvance

Post by **SteveH** » Fri Sep 21, 2007 3:45 pm

No sounds normal to me... there's lots of jet wizardry under the bonnet when starting, whilst running and then after you've turned off.

Welcome to the big smiles club!

Post by **Rupert** » Fri Sep 21, 2007 4:10 pm

There are a few fans and pumps which start up, but I particularly like the switch-off whines, sounds like a plane has just stopped its engines

Post by **tombs** » Fri Sep 21, 2007 4:20 pm

Yep, that is normal, fans pumps, and the warp engine kicking in

Post by **el_ringo** » Fri Sep 21, 2007 6:16 pm

Heh heh, I find the Air Con pump is the jet noise one. No idea why it is so loud on the '6

Post by **rs6_newbie** » Fri Sep 21, 2007 7:24 pm

thanx guys for the heads up! much appreciated!!!!javascript:emoticon(':D')

Post by **SteveH** » Fri Sep 21, 2007 7:37 pm

No idea why it is so loud on the '6

I reckon that if you imagine the environment in which it operates, it needs to be a big bugger in the RS6 to overcome the heat from the beasts heart!

Post by **justinthyme** » Sat Sep 22, 2007 5:22 am

speaking of fans and noise etc., are the turbo's in the rs6 self-lubricating? in other words, do you need to keep the car at idle for a couple of minutes before shutting down or can you kill it straight away (assuming normal / average driving) and how long should one allow it to cool down after a blast?

Post by **Rupert** » Sat Sep 22, 2007 8:03 am

I always allow a cool-down time, but there is a secondary cooling circuit which keeps a pump working after switch-off.

Post by **CarlosV** » Mon Sep 24, 2007 8:50 am

I used to have a pump whirring away after switch off, but since I recently sent it in to get the doors to self lock whilst driving it seems to have disappeared. I put this down to me not driving hard enough on the short trip to work and back as its only about 5 miles I thought perhaps there was a temperature switch or something. But I was away for the weekend in the beast and noticed it still wasn't whirring after a longer trip, does anyone know if this after switch off cooling circuit is controlled/switched by the VAG codes or am I looking at something more expensive? It just seems a bit of a coincidence.

Post by **skiwi** » Mon Sep 24, 2007 10:25 am

the "jet noise" is the 600watt (big) fan on primary speed for the air/con - turn that off and it will only start up when the engine temperature requires it.

the turbos have a water cooling circuit (in addition to the oil circuit) and an "after-run" pump which keeps the coolant circulating after switch off. you should *always* hear this going after switch off - a gentle wiring sound for a couple of minutes. it is triggered by engine temp >60c which will occur on even a 2 minute idle - which makes it easy to check.

Post by **nickband** » Mon Sep 24, 2007 3:04 pm

the air con fan makes a hell of a noise in my car

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