tomc_mets

Finally got the cap off. Got a pair of work gloves that gave me a bit more grip. Topped it up with distilled water. Tightened manually as much as I could.
Pic of inside of cap...T

DC911S

As suspected, you can see where the o ring seal had become hard and pressed, causing it (coolant) to leak out. That's the white residue.

tomc_mets

New coolant cap arrived earlier from Suncoast this week while I was out of town. Took a bit of oomph to get the old one off, but I waited until the AM when the car/air temps were coolest and with a pair of rubberized work gloves was able to finally get enough purchase on the cap to get it off. Added about a cup of 50:50 coolant:distilled water mixture. The new cap is now on; hand tightened. Used the officially blessed "pink" coolant from Porsche. Dealer charged me abt 5 bucks more than Suncoast would have, but likely a wash once shipping charges included.

https://www.pelicanparts.com/More_In...SABEgLpM_D_BwE

Fingers crossed this is the solution.
Now, to drive her to make sure everything is well mixed!
Caio, and thanks for the advice everyone!

T

Bryan997

I was having the same issue with my car. Thank you all above for sorting this out. I have a new cap on the way!

Big Thank You to Desmo for providing the link to the new style of cap!

marinaq

Hey folks!
I recently bought an used 2017 Cayenne S e-hybrid and less than 3 months with it, I had the warning about the coolant.
what surprised me was that the coolant in the bottom left was almost empty!!! I wasn’t sure if that was the spot to fill but you guys made me confident. I bought the coolant at Walmart for $20 and a funnel for $2 and filled it around the max level. Hopefully now it’s solved and I saved a few hundreds… but I certainly wouldn’t do it if it wasn’t for all the details seen here!!!

Spastblast

For future reference: I also had the latest cap design (-04) but it still had to be replaced to prevent small leaks when pressurized. Moral of the story: if you have the latest cap, you still might need a new one.

Stevo76

Hey marinaq

I've also recently purchased a 2017 Cayenne S e-hybrid in the last 3 months and experienced the exact same issue. It's the coolant reservoir in the bottom left which looks too low, i believe this is for the battery.

How did you manage to screw the cap off to top up as it's not very accessible? Also any further issues with this after you topped up?