I've got a 1970 Cadillac Eldorado, about 58K miles.
When driving it, it's fine.
Sometimes after a ride I stop the car and the plastic coolant tank
(outflow hose) will overflow and spill some coolant onto the street.
This never happens WHILE the car is in motion, and I can always
start it up again and drive it if I want to right away.
I heard a gurgling noise when I had the hood open once when I
tried to diagnose it. Came from the middle-to-back of the engine
compartment on the left side, then through the tube and then ..
no surpise ... coolant surges into and overflows the tank.
Anyone have any ideas why this happens? I have not added
or removed any coolant recently. And I've not seen any coolant on
the street before this either.
Is this simply a thermostat problem? Do I need to replace it?
Thanks in advance for any ideas on this.