Dumping coolant after after short drive

[oldskool73]

Exactly the same think happened to me over the weekend, only after a 2 hour drive in 38c/100f heat. Reached our destination and as soon as I turned it off the car promptly dumped the entire expansion tank on the floor out the overflow by the rear right wheel.

I've known I had a version 1 cap on there since I've had it, but it's always been fine... until it's not, haha! Bought a new version cap yesterday, topped it up, am going to run it for a while with the bleeder valve open to free any trapped air (also sat for 10 minutes with nose down on a steep carpark ramp last night to help) and hoping that fixes it.

The caps are printed on top 996.106.447.0x ... if your 'x' is less than 4 upgrade to the newer one, they only cost about $25US from a dealer.

[Stiles13]

Originally Posted by oldskool73

Exactly the same think happened to me over the weekend, only after a 2 hour drive in 38c/100f heat. Reached our destination and as soon as I turned it off the car promptly dumped the entire expansion tank on the floor out the overflow by the rear right wheel.

I've known I had a version 1 cap on there since I've had it, but it's always been fine... until it's not, haha! Bought a new version cap yesterday, topped it up, am going to run it for a while with the bleeder valve open to free any trapped air (also sat for 10 minutes with nose down on a steep carpark ramp last night to help) and hoping that fixes it.

The caps are printed on top 996.106.447.0x ... if your 'x' is less than 4 upgrade to the newer one, they only cost about $25US from a dealer.

Went through the whole process of refilling and draining and this seemed to work after a 30 minute run. I had not opened the cap previously since I bought the car 2 months ago. New cap should arrive today! Thanks to everyone on here! In just a short time I have learned a lot about these quirky little beasts!

[Cunningr]

I had same similar issue last year, never found a leak or reason for over flow other than the mechanic had the coolant serviced to just under the max line. My guess was the coolant was serviced in wither and maybe the giant difference in winter to summer temp here caused the excess coolant to over flow, as soon as it was a little below the max line never lost any more fluid. The other possible was the cap crossed up, from me checking the fluid.

Anyway hope your good to go!