I used my CGTS most of the day yesterday and parked it around 3pm..it was warm, obviously a/c was on (4 zone). We used the other car when we picked up our daughter from her friend's house at 10pm, and I noticed a couple of drops of liquid on the floor underneath the CGTS- just behind front right tire, about a foot in. I thought it was just condensation, so did not think much about it. Just before leaving for work this morning, I still noticed the 2 drops - nothing was added to it, but I was kind of wondering why it did not dry up. I touched it with my finger - it was like water with carbon, no smell. When I got home earlier this evening - the 2 drops were not there anymore - so they dried I assume.

I'd seen some condensation/drips on the floor before, so I thought it is just normal.

there is no marks left on the floor


still curious, I peaked underneath. I noticed there are some moisture right around where the cross member is bolted. As you can see in the pictures below - there is moisture..I touched and smelled it, cannot really make anything out of it. I truly hope it just water.. but I really doubt. Again, no dripping, just moist.









there is not mark/drip on the floor below this spot.

It is only about 5,000 kms since last oil change, and even though vehicle is requesting for service in 1500 kms, I originally did not intend to bring it in for service/oil change for another 5000 kms. But, if this is something I should be concerned about - I will definitely make use of my Thursday appointment..

do you guys have an idea what it is or what it is about? should I have it checked anyway?

Thanks,
Fernando

 

when you say 'right', I assume you mean passenger side.
The ac condensation does get drained a bit off center, bit closer to passenger side, rear of the front wheels. Kind of on left side of where front passenger keeps their legs (if I had to describe as I see it).
If you drove with AC on, then I would expect there to be much more than 2 drops. Should be more like a puddle of water in that area.
If you touched and is not greasy/oily, then should be water from ac condition system. For 4 zones, there is another vent out under the driver side, a bit forward of the exhaust tip.

I would drive regularly, and when you park, place a couple sheets of white paper under that area. You will see if there is color to it once drops hit.
No color = good. Any coloring and/or grease/oil, and you may have a leak of some sort.

Pinkish could mean engine coolant (antifreeze).
Depending on what color your window washer fluid is, it could be that too (wont be greasy but will have color depending on what you put in).
Reddish could be brake fluid (there are other colors too depending on what is put in).
Greasy brownish/honey color could be oil.

Exclude easy ones first and focus on the trickier ones next.
Get dirty, remove the under covers and take a good look with flashlight, noting any wet areas. Make sure to touch. Some areas may look wet but when touched will be very dry. Wipe off any areas you see in question (degreaser from Wallie world - 3 bucks), and check again a week later if needed. Will take a bit of time but with some patience you will know what it is.

 

thanks Ciaka.. will take a closer look tonight. I booked the car for service for Thursday morning - if I am not sure by then tomorrow if it a non issue or not, I will just take it in for service just to be safe. We will be on vacation next month and intend to do a lot of driving.

 

I agree. The best way to troubleshoot this is to remove under panels and use a couple of cans of engine degreasers to get everything clean. Leave the under panels off and then take a short drive to air dry (or use compressed air if you have it).

Then check over the next couple of days to see what reappears since you know you started from a clean slate. Leaving the under panels off will prevent leaks from running too far away from the source.

 

ok, thanks guys. I will cancel Thursday appointment for now and proceed as instructed here.

 

Sounds good. Let us know how it goes... G/L

 

I haven't really looked where it came from, but one thing for sure - it is water.

I did not drive the vehicle for a few days, and now the area pictured is dry. Without looking at it, my cousin who installed the bypass pipes told me after seeing the pictures that it should be coming from the exhaust/bypass joint, and the seal now with the bypass pipes in place are not as good as when the factory cats were installed. I hope the other Cayenne owners with bypass pipes can look underneath their vehicles after driving with them for a while and see if they have the same experience. I have a high temperature silicone, I will try sealing the joint.