16'991GT3

Hello,

I was driving today in my 991 gt3, and received a notification stating, the engine was too hot, and needed coolant immediately and to not continue driving, the temperature gauge was st the max temp. I turned the car off, and turned it back on and it was gone, and my brother told me something like this happened to him when he took it out for a spin a couple weeks ago. I thought I read a thread on something like this earlier, but I can't find it, can someone point me to that thread if it does exist? If not can someone advise on this? I am going to get it checked out by my dealership to be on the safe side but just wondering if it could be a real issue with my car or if its a faulty reading?

Thanks in advance!

Birel22

Sounds like a faulty thermostat. Your dealer should be able to make quick work of it. Its a known gremlin...

neanicu

It is most likely a failing thermostat.

16'991GT3

Thanks folks, thats what I was thinking, and I swear I've read it somewhere here, just couldn't dig it up

Mike in CA

Just so I understand, you got the warning message, saw that the coolant temp was at max, and shut off the engine. When you restarted the engine, the warning message was gone.... but what did the temp gauge read?

If the thermostat was faulty I would expect the temperature reading to still be high even if the message cleared. The engine can't have cooled down in the time it took to shut off and restart the engine. OTOH, if the temp gauge had returned to a normal range then you may have a problem with the temperature sending unit or the ECU.

Either way, you should get it checked out.

neanicu

Mike,we are basically just assuming he's dealing with a faulty thermostat because of the high failure rate in these cars.
In modern cars,a faulty thermostat will cause the cooling system act very erratically and unpredictable. I have recently diagnosed a late model BMW with a faulty thermostat and the temperature gauge will shoot straight to maximum temperature after a few minutes of driving,which is impossible. As soon as you'd shut the engine off and restart,it would go back to normal.
I know I have seen a pic with the 991 GT3 PET and the thermostat is part of a complex housing,including a bypass and possibly a coolant temperature sensor,part of the same housing. Modern cars have 2 or more coolant temperature sensors. Porsche replaces the whole housing when doing a thermostat,not just the actual simple metal device with a spring.

neanicu

Here's a good thread for those that have missed it :

https://rennlist.com/forums/991-gt3-...explained.html

SmokinGTS

Mike
I think the car is programed to go to max temp with a low water level to protect the engine while getting your attention.

Mike in CA

Nick and Ed,

Interesting! Thanks....

neanicu

Mike,you're welcome and here's something unrelated for your engineer reading pleasure :

http://www.plasticstoday.com/polyami...-oil-pan/24859

And here's the whole thread,in case you feel adventurous enough to head to the Off topic section :

https://rennlist.com/forums/off-topi...-near-you.html

These are the kind of threads I'd like to see more in the Technical section.

Mike in CA

Thanks Nick! I can fully appreciate the cost and especially the weight advantages of the polyamide pans; saving 2 kilos on that single part is significant. With a plastic pan my DIY oil changes will also be shortened by several minutes as I'll no longer have the incentive to linger under the engine admiring the beautiful aluminum castings!

neanicu

I think plastic oil pans is a terrible idea Mike! And time will prove me right!

Mike in CA

Yeah, plastic oil pans....what could possibly go wrong!?

16'991GT3

Hello, got a little busy so didn't get a chance to see these, but what Nick said above is exactly what's happening, I was driving for a couple minutes and all of a sudden the temperature gauge shot up and I got the message, I turned the car off, and turned it back on and it went away and then came back in a similar way I'm unfortunately not home for the next two weekends do I think I will have to get it checked in 3 weeks which sucks, but hoping my brother can take it since the dealership is on his way to work

bronson7

It should be a simple fix.