Hoops88S4

Im at a loss here, this morning I drove my Porsche into work, when I got there, i was leaking antifreeze/coolant at the reservoir area. The car wasnt running hot at all. About 8 hours later, I drove home, after adding some coolant. Well, no problems on the way home, no overheating issues what so ever. I pulled into the driveway and notice a trail of fluid down the street and into my driveway. Same problem, coolant leak quite a bit I might add under the reservoir area....Help...I dont know whats up.

no doubt

Most shops can do a very inexpensive and fast "pressure test" of your system to determine where the leak is located. Often it's just a loose or cracked hose and an easy fix.

You can do these tests at home if you are even remotely inclined.

In the meantime look for obvious loose hose clamps/split hoses (squeeze each hose to see if coolant gushes out from a split), failed radiator cap, etc. You'll probably get lucky and not have a serious leak (e.g. blown headgasket, failed water pump, burst heater core) but because those possibilities exist you'll want to check the car out ASAP.

When she cools off, take a look at how low your coolant level has dropped in your reservoir.

davek9

If the hoses look good, see if you can spot where it came from, water runs down hill also check your Coolant tank cap, could be time 4 to replace.

PorKen

I had the same symptoms recently. It turned out to be the coolant pressure sensor, which is about a hand's width forward of the reservoir, by the washer fill tube. It would only leak when the engine was at full temp. The sensor splits down the middle. You may see a white residue on it if it has been leaking.

I replaced it with a new section of hose, and a 8mm (5/16") connector.




Other possible problems: reservoirs can crack, and the caps can leak.

morganabowen

I also had this problem, and it turned out to be a crack in the plastic reservoir. Just replaced it, now I have a small crack in one of the plastic side tanks

M. Requin

Ditto, same problem, same fix. A replacement sensor is pricey.

Hoops88S4

Figures, nothing is cheap with this car I checked around today under some more light, there was no further leaks. Im gonna take her to the mechanic to have a more detailed inspection. I felt around the reservoir and didnt see any leaks either. Im not quite sure if what I saw was the sensor, but it looked ok, so will see. I lost about an inch of coolant in the reservoir but overall still a lot left inside. Hopefully its pretty simple fix. I will update, thanks!