Originally Posted by jbx2

When you "Flashed" (flushed) the coolant did you pull a vacuum and let it settle? If you used an Air Lift tool you would have been able to detect a leak in the coolant system.

Originally Posted by Spyder_2011

Seems that if there’s oil in the coolant you would also see coolant in the oil once the coolant system fully pressurizes. Are you getting coolant in the oil too?

I agree with jbx2, typically when you refill the coolant system the proper method is the use of a vacuum tool that pulls vacuum on the entire system. Doing that may expose a vacuum leak somewhere if the vacuum doesn’t hold steady.

Originally Posted by old man neri

Is what I see in the picture the only evidence you have of coolant mixing with oil? Because to me that just looks like ordinary condensation on the oil cap. This is caused by cold weather, shorter trips, and perhaps an AOS that is misbehaving.

Originally Posted by harveyf

I would agree with @old man neri in the sense that I would at least drop the oil filter canister and see what the oil at the filter looks like. To add to that, if the car only makes short trips, it may never get the oil hot enough to boil the natural condensation of water vapor out of the oil.

Generally, head gaskets are a prime culpret with regard to oil/water mix. There are standard automotive tests, not unique to Porsches, that can be applied. There is a tester that you can dip into the coolant to check for combustion gases. You can pressurise the coolant system and see if it holds pressure. You can do a leak down test on the cylinders. Again, none of this is Porsche specific, just standard diagnostic stuff.

If you really want to get down into the details, you can work your way through the link below.

https://newhillgarage.com/2023/04/14...tem-explained/

Originally Posted by S4tech75

You need to take a proper oil sample first as mentioned above. In legit cases of mixing, internal engine oil cooler leakage is possible but if a PDK, the pdk cooler can also create a mixing issue. The quality of the mixed fluid with coolant looks and smells a little different though.

Originally Posted by Docbentley

What is your oil level? Low?
maybe someone added oil to the coolant tank?

Originally Posted by Cemlo

TLDNR
In order of frequency, higher to extreamly low
Oil in Coolant - possible cracked cylinder head (backside of head, not frontside like usual (i.e not combustion side))
Coolant in Oil - possible cracked cylinder head, cylinder, heat exchanger
Mix in both - again, cylinder head - requires close to balanced system pressures under certain conditions (hot day etc.)
Rare if ever, head gasket failure.

Originally Posted by Spyder_2011

That video is excellent. Most of what is discussed revolves around the 987.1 but he didn’t go into any detail on the 987.2. I’m curious if the same cause (water pump) is the primary culprit of the cracked heads or are the 987.2 intermix caused by something else?

shareeda it would help to know how many miles and what type of maintenance the car has had done.

Originally Posted by shareeda

here is a photo of the coolant

Originally Posted by Spyder_2011

If you’re confident it’s the heat exchanger for the PDK the other component to check is the PDK oil which it looks like you already have planned. If you don’t mind please report back your findings so we can all learn from this.

At that mileage I would hope that the water pump, belts and other maintenance items have been performed. If they haven’t been changed I would definitely get it done.