Why is my coolant overflow not draining back into the radiator?

2019 - Coolant overflow emptying overnight?

It is normal for the coolant to expand as the engine heats up and therefore flow into the overflow. And then over night the coolant level should drop.

coolant not returning to readiator - ultimatesubaru.org

I have found the hose going from the radiator to the overflow tank can get loose at the connection to the radiator and not suck out of the tank.

radiator overflow tank keeps overflowing? - Suzuki Forums

If there is a leak anywhere in the cooling system, it will prevent a vacuum from building and the coolant will not be drawn back from the ...

Can't figure out why coolant won't draw back into cooling system

Could you have some crap in the bottom of the overflow tank since the hoses don't seem to be compromised? Basically, is it possible that the ...

Help!! Coolant overflow problem!! - Jeep Cherokee Forum

If the overflow bottle fills up, coolant will flow out of it and onto the ground. That's some major overheating if the overflow bottle overflows ...

NEED HELP!! Coolant continuously spills out of overflow.

Sometimes the overflow levels will go back down really low after sitting over night. The procedure I used is outlined in the How To Section. ( ...

Coolant recovery reservoir doesn't go up or down, normal?

Try burping the air out of the top radiator hose. Squeeze it a few times. It should feel like you're pumping liquid not an empty hose. Air might ...

Coolant Reserve/Overflow Tank causing overheating issue

The problem was: the tube from the cap of the radiator had fallen inside the reservoir and hence it wasnt able to suck the coolant....see if ...

Reservoir Coolant Level - Jeep JK Wrangler - JK-Forum

When the Engine is cold, check the Radiator, if it is not full then coolant is not being sucked back from the reservoir. Possible issues are a ...

Help w/ coolant not getting sucked in by radiator - GenVibe

Later, when the engine cools, the coolant will contract creating a vacuum, and will suck some more back out of the overflow reservoir. For a car ...

How fast does coolant circulate from reservoir thru engine?

Wait until they all stop, which is minutes, put the plugs back in the block, close the drain **** on the radiators, tip new coolant into the ...

coolant pouring out of overflow tube... - Land Rover Forums

That said, it's possible that you have anobstruction in the system that's causing the fluid to back-up, for example. If the coolant level in the ...

Coolant overflow - Nissan Pathfinder Forum

Head gasket is blown/broken. The other part would be thermostat but you already changed it. With the engine cool, remove radiator cap and run ...

Coolant pouring out of overflow - Honda Shadow Forums

It also seals when it cools down and the fluid contracts and flows back into the main system. And the metal disc is a one way valve to allow the ...

Engine coolant overflow, I have a bad feeling about this.

- Drain some of the water out of the system. Half way down in the radiator will work. - Remove the thermostat housing and thermostat. - Fill the ...

Coolant draining out of radiator overflow tube

You are probably overfilling the radiator and it's just blowing off the excess. When 'filling' cooling systems and batteries more is NOT better.

Help explain coolant expansion tank?? - Trawler Forum

AND, if so, can coolant be drawn back into the reservoir FROM the expansion bottle/coolant tank when the engine cools? My mechanic said that ...

Slow coolant overflow | GMT400 - The Ultimate 88-98 GM Truck Forum

Also, coolant in overflow tank does not drain back into radiator when engine cools down, like it should. All these problems point to radiator ...

The coolant was pushing out into the overflow and filled the bottle ...

Yes, this most definitely sounds like a blown/leaking head gasket. All the symptoms are there: excessive pressure, over heating, loss of coolant ...

blowing coolant out of overflow tank - Duramax Forum

Sounds like the classic problem of bad head gaskets. Is the top radiator hose firm after driven hard and has sat over night?? Chevy 04.5 LLY, ...