02 a6 2.7t losing coolant slowly
Login  | |
|
02 a6 2.7t losing coolant slowly - 3/20/2008 9:53:03 PM
|
|
|
maldorf
Posts: 12
Joined: 3/20/2008
Status: offline
|
The car only has 45k miles on it. its losing coolant at the rate that requires me to refill the tank about every 3 weeks when the sensor on the dash comes on. The dealership has had it for almost 2 weeks and cant find a thing wrong to explain the loss. They did a hot and cold leak down test and those came back fine. Put dye in the coolant tank and cant find a thing with that either, no signs of leakage anywhere. No sign of any dye in the exhaust and no codes have been thrown on the computer. The car runs like new, no issues except to continual loss of fluid that has been going on since late october. Ive gone through over 1 gallon of the coolant, so 2 gals of the mix. Not a sign of leakage anywhere ever, and so signs that the coolant is getting into the engine. ANy ideas?
|
|
|
|
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/20/2008 10:11:53 PM
|
|
|
maldorf
Posts: 12
Joined: 3/20/2008
Status: offline
|
Its a big mystery as to where the hell this coolant is going. They have checked everything supposedly. They have even had in special audi techs to look at it. Guess these guys travel around and look at issues on cars. They mentioned that the guy was out of the country the first time I took it in. They say that a couple of techs from audi have looked at it.
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 3:49:57 AM
|
|
|
keepupp
Posts: 44
Joined: 6/19/2006
Status: offline
|
I had the same issue and it turned out to be the auxillary/secondary water pump leaking. It only got worse as time wore on and I finally had it replaced.
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 6:15:45 AM
|
|
|
slee22
Posts: 503
Joined: 11/8/2004
Status: offline
|
Yeah it's probably the auxillary pump. Shine a flashlight under the intake manifold and see if you spot some crusty pink crap. If so, there's your problem. Also, if it is leaking get the relocation kit installed when you have it fixed...it'll save a lot of time later on.
< Message edited by slee22 -- 3/21/2008 6:26:04 AM >
_____________________________
2002 A6 three.oh
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 6:37:07 AM
|
|
|
maldorf
Posts: 12
Joined: 3/20/2008
Status: offline
|
I wish it were so simple, but you would think an audi dealership would find such a problem in the course of 2 weeks. They even have the dye in there and cant find anything anywhere. I will throw the idea at them and see what they say, but im sure they have looked there. No sings of coolant leaking anywhere, and they have torn part of the car down too. Cost me $450 just to do that, not sure what they took apart but they said they had to tear it down so they could see the engine and turbos better. That is a place that is notriously responsible for such problems isnt it? I think ive heard of others having the issue. Maybe I will get lucky and thats what the problem is.
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 6:39:57 AM
|
|
|
maldorf
Posts: 12
Joined: 3/20/2008
Status: offline
|
How long did it take to get worse? Mines been doing this now for about 5 months and has not gotten any worse. Still losing at the sam rate. If that part is bad, wont you find resude around it or leaking to somewhere else in the car? In my case its like the coolant is getting burnt up somewhere.
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 8:13:58 AM
|
|
|
techbod
Posts: 12831
Joined: 11/4/2005
Status: offline
|
most common leak is under the plenum on the V6 so cant be detected and it dries up quick with engine heat ( they should use a dye to find the leak ) but that = $$$£££
_____________________________
Dave
UK member
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 8:24:49 AM
|
|
|
formulagigi
Posts: 1128
Joined: 4/23/2007
Status: offline
|
two most common leak causes are:
- auxiliary pump mentioned above
and
- crack in expansion tank ($25)
Check for spots becoming yellowish toward the bottmo of the tank...
yeah you would think a dealer would have found the cause in 2 weeks but my experience with dealers is not positive so I would suggest you c heck the above two and then take it a good Indy shop specialiazed in Audi.
_____________________________
 
2004 A6 Stg 2+ and 99 TJ...mod
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/21/2008 7:14:08 PM
|
|
|
maldorf
Posts: 12
Joined: 3/20/2008
Status: offline
|
thanks all for the advice. Going to call tomorrow, saturday and hit them up with questions about some of these problems you all mentioned. Really does sound like it could be that aux pump.
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/22/2008 7:00:48 AM
|
|
|
formulagigi
Posts: 1128
Joined: 4/23/2007
Status: offline
|
it IS a VERY common cause of the leak and it is not a matter of IF it'llleak but more when :)
By the way, if you they replace it, they have to remove/move the intake at the top of the engine, so while you're at it spend 75-160$ or so on intake spacers/gaskets such as New South Power gaskets or VAST phenolic intake spacers.
I love mine, the engine runs cooler and is torquier at low and mid RPM's. It'll be no labor since they'll already ahve the intake off.
here's what I have, they are the NewSouth Powergaskets for $75
http://www.gmpperformance.com/index.cfm?PG=detail&PID=159555&VS=1
PowerGasket™ gives you up to 5% more power from your engine by reducing the temperature of the incoming air to your engine. NewSouth Performance has designed an insulating gasket that radically reduces the heat transfer from the cylinder head to the intake manifold. This gives you cooler, denser air for more horsepower and performance from your engine. Made from a high performance polymer, PowerGasket™ conducts on average less than 1/500th of the heat of the steel gasket that it replaces. Your intake manifold will stay 30-50° F cooler and your incoming air will stay 20-30° F cooler. PowerGasket Plus™ is a composite material that has a significantly higher continuous operating temperature than the original PowerGasket and does not require the application of any extra sealant.
VAST makes those too, $160
Phenolic Intake Manifold Spacers
[2.7T, 2.2T, 2.3 ...]
$160.00
Click to enlarge
We're the first to release phenolics for the 2.7T, 2.2T/2.3, and 4.2 motors. Accept no other imitations out there without our research, build and install experience for hundreds of sets to date. These are ~10mm phenolic spacer kits. For the Audi 2.7T, Variations include: S4 intake manifold to S4 heads, RS4 Intake manifold to S4 heads, RS4 intake manifold to RS4 heads. We designed these from scratch and make them by hand. The intake manifold will be insulated from heat conduction through the heads, leading to lower intake air temps -extends the intake runner lengths for better low end torque. Expect a minimum of 5-10hp at the crank. Comes with all gasketing and bolts. Please see our other variants.
Note, on 2.7T installs, ***especially noted for APR BIPIPE USERS****. These fit with any version of bipipe or throttle body boot you may have but some timing belt covers with hard piped bipipes may need slight trimming on the unnecessary timing belt cover threaded bosses. You don't need the screw holes on the timing belt covers on the bipipe. It also helps to install the 2.7T spacers while slightly pushing back on the intake manifold to get good clearance to your mechanical fan.
_____________________________
2004 A6 Stg 2+ and 99 TJ...mod
|
|
|
|
|
RE: 02 a6 2.7t losing coolant slowly - 3/22/2008 8:02:26 AM
|
|
|
maldorf
Posts: 12
Joined: 3/20/2008
Status: offline
|
thanks all. Ill see what they say today or on monday. Will keep everyone posted.
|
|
|
|
|
Printable Version
