Maverick787

I really hope that's the case as adding water or coolant is a very simple fix vs a trip to the dealer, and nothing serious. Well off to buy some distilled water

NateOZ

I agree it would be the bleeding procedure not being completed fully at the factory, it takes time and adding water is pretty easy in the scheme of things. It's probably on the dealer PDI list as well? Hard to get all the bubbles out without using a pump to circulate fluid.

vdar

Had this issue as well... seemed to reset and go away after I restarted the car, but then the coolant temp reading would vary between 140-200F when driving where it used to be rock steady at 190F or so. Initially just topped off coolant which was apparenlty a bit low, but that did nothing.

Dealer had to replace the thermostat and all seems good now. Have seen a few people on RL post about having this issue now, so maybe not random failures :-/

916Bob

When temp got to 224, I turned the heater up with fan on high which stopped the temp rise (not fun... it was 88 degrees ambient). I was told the cooling fans are to come on around 215 to 218, and will stay on 'till temp drops to 200. I never heard the fans. There have been several part numbers / versions of the thermostat so it's likely a problematic part.

zedcat

Thanks. I'm going to get the dealer to check mine. Doesn't seem right to get to 220+ in just 80F ambient. August will be a lot hotter here...

Macca

It is a reasonable theory. Mine was after being shaken up on track all day (I.e including a spin/tank slapper in the pouring rain towards the end of the day. Could have caused some air bubbles. I did note a eek later when checking the coolant level after reading a thread here that it was indeed reading low....

Just in time

I have had similar I ssues. Got stuck in traffic ( interstate) crawling along in low 60s weather with light rain. The water temp shot up to the 220s. As soon as traffic started moving it reverted to the mid190s. No warnings Ever came up. Did not hear the fans kick in if they did at all.

Tosilog

I had to add 600 ml of distilled water as well. When stuck in traffic, my coolant temp also gets to around 220s. So is this normal or does it mean that the thermostat is defective?

916Bob

The Tech who worked on my car said the fans are to come on around 215 to 218 degrees. I would expect that the temp should not go much over that... maybe 220? The fans should come on by then and start dropping the temp, and stay on until the temp drops to 200. If you're not seeing a temp drop after hitting the low 220's, I'd take it in. JMHO

Maverick787

Added about the same, and all good no issues.

Tosilog

i have heard the fans kick in a few times in traffic. It so happen that I had a few things inside the frunk, which got quite hot, most likely due to the heat from the radiators. All chocolate bars melted :-(

rockitman

I hope you mean 600mls of 50/50 mix of distilled water and Porsche (Pink colored) antifreeze...not just water ?

Tosilog

unfortunately, just water. bad? very bad? kind of bad?

rockitman

You have diluted the proper ratio, which ensures the correct boiling
and feezing points...you may be okay for 600ml which means you are 300ml more diluted for anti freeze requirements...just add 50/50 when you need to add more to the reservoir down the road.

DrJupeman

As long as distiller water, you'll be okay. Water cools better than "coolant" so on the heat side you're actually better off. You want the antifreeze part if the car is going to be exposed to cold and freezing temperatures. You do not want to take any chances there. Overall you have raised the freezing and boiling points slightly. Coolant/antifreeze also provides corrosion resistance which is important over time. Just never add water of any kind other than distilled.

For reference, the factory cup fill recommendation (at least for my old Mezger) is one gallon of Porsche coolant and the rest distilled water (which results in about a 1:4 ratio or thereabouts).