Audi Steam Coming Out of Bonnet Forum

I've noticed what looks similar grey smoke or steam coming out of the front nearside area - maybe through the grille or from foglight expanse. This happens with a hot engine (105 degrees Celsius) and when the car is in stop-kickoff traffic. I've tried to recreate it with the bonnet open up and the automobile idling for ages simply I cannot recreate it to really see where the fume/steam is coming from. It's near as if it happens when the electrical fan operates as the fume/steam only comes out every now and then. It'south a fleck disconcerting to say the least!

My coolant was a tiny bit beneath minimim after a hot engine but as I opened the cap it rose to the right level so I don't think i'm losing coolant. Later on a difficult drive and a hot engine the oil temperature is effectually 105 degrees Celsius and then it'due south not an overheating engine.

One of my theories is that crud on the rads is existence burnt off and shows when the fan comes on. I'm hoping it'due south as simple every bit that. Any ideas?

Post by **bluenosewrx** » Mon May 30, 2011 nine:15 am

Looks like it may be the aux radiator mate. Not certain though. Someone will tell u.s. shortly no doubt

Mac

Mail by **adsgreen** » Mon May 30, 2011 x:35 am

Not sure with the rs4 simply with all Elise based cars as the radiTor is mounted horizontally with vents in the bonnet directly in a higher place and so when it rains water drops downward onto the hot radiator and turns into steam. Looks exactly like a holed radiator and you practice get alot of people pointing and laughing.

If there is water pooling somewhere and so this could be something similar and the steam is simply some exterior water beingness turned to steam which is noticeable ESP when the conditions is cooler and wet.

The fact that the coolant level rose when yous took the force per unit area cap off does suggest the system is maintaing pressure as whn the system is closed it should not expand as much as when the system is open up. Nevertheless it'south not always a 100% assessment as the arrangement contains several thermostats that can isolate a leak but if you tested this on a really hot engine that's just been running then information technology probably is ok.

Finally boiling coolant stinks - if information technology happens agaIn go downwards and have a proficient sniff. If it doesn't smell then it's water and on the outside.

Mail service by **wrekka** » Monday May xxx, 2011 10:39 am

Def sounds like an aux radiator, I had the aforementioned. Mine could do with changing but leak is then small I inappreciably ever have to top it up

Post by **Rick_RS4** » Mon May 30, 2011 ten:50 am

i have exactly the same symptoms, terminal time information technology happeneed when stood in traffic and does smell a scrap coolant-y, but the coolant level stays the same,

what almost some of that rad weld stuff? for a temp fix

Post by **PetrolDave** » Mon May thirty, 2011 10:51 am

bluenosewrx wrote:Looks like it may be the aux radiator mate.

+2

Look for coolant drips a few inches in front of the wheel.

Tha annoying thing is that 1 of the redesigns between the B6 and B7 S4 (which the B7 RS4 inherited) was the auxiliary radiator ducts in a (failed) attempt to cure this problem.

Post past **Shoppinit** » Monday May 30, 2011 11:24 am

Rick_RS4 wrote: what most some of that rad weld stuff? for a temp prepare

I'd be very scared nearly putting that in my engine.

Post past **Shoppinit** » Monday May 30, 2011 11:25 am

adsgreen wrote: Finally boiling coolant stinks - if it happens over again get down and accept a skilful sniff. If it doesn't smell then it's water and on the exterior.

+i Smells of curry powder.

Post past **wolfgang** » Mon May xxx, 2011 iii:14 pm

Cheers very much for all of the replies - yous guys are very helpful!

I can live with the problem for a while and volition get it booked in afterward in the year, unless it worsens.

Postal service by **neckarsulm** » Mon May 30, 2011 3:50 pm

Don't yous take warranty remaining?

Post by **PetrolDave** » Mon May thirty, 2011 4:42 pm

wolfgang wrote:I can live with the problem for a while and will get it booked in afterwards on in the twelvemonth, unless it worsens.

I idea that when my started dripping, but took a couple of weeks to go from an occasional drip to a steady trickle - best get it booked in and sorted at present.

Mail by **Shoppinit** » Mon May xxx, 2011 4:45 pm

Also if the system isn't hermetic and so it can't exist pressurised, lowering the boiling point of the coolant. This could pb to information technology boiling inside your block or other sensitive parts of your engine and not providing the necessary cooling.

Seems like an unnecessary take a chance waiting to get it done?

Post past **wolfgang** » Tue May 31, 2011 10:51 am

Okay, i'm trying to get it booked in for next calendar week.

Post by **Boggle73** » Thu Jun 09, 2011 4:43 pm

Hi,

I had aforementioned today while sat in traffic, a puff of steam from N/South front.

Took machine to stealer's direct away. It was looked at this afternoon and diagnosed as Aux Rads.
They are keeping it in A&E and taking some pics for warranty claim.

Hope they dont wash it again, they made a correct shambles last time.

Audi Steam Coming Out of Bonnet Forum

Smoke or steam from front nearside area

Smoke or steam from front nearside area

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