Coolant BURP?

[Jberger]

Guys,

Twice this week my 90Q seems to have 'burped' coolant when parked after a drive on a very hot day.

Looks like 1-2 cups of coolant from the overflow tube, but the system still shows as "full" even after the loss when hot.

I assume that the system was slightly overfilled from the last flush and the superhot summer is finally expanding the coolant to the max. But needed a second opinion.

Any ideas?

The car is NOT measuring an overheat and the needle has not passed the 1/2 mark.

[elwesso]

That'd be my guess....... There is a "spew hole" on the top of the res tank...... Where is the leak, relative to the car???