stuck thermostat?

TT5.9mag said

There has to be a restriction somewhere to have vacuum. If the upper hose was off and the radiator was open to atmosphere then the rad is severely plugged.

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The cap was off, so yes, open to atmosphere

When I squish the bottom hose I can hear the coolant move in and out of the engine (I can hear it sloshing through the thermostat housing


I put in the radiator 6,7 years ago when I swapped in the 360