Coolant flows into the water pump thru the bottom radiator hose, into the block from the water pump, up into the heads, and then to the intake crossover (or heater core from the back pass side head), then back to the radiator via the top hose. Coolant from the heater core is returned to the water pump not to the radiator.
bottom to top
It flows in the bottom hose of the radiator and out the top hose.
The heated coolant comes out of the engine from the connection in the intake manifold and returns thru the connection into the water pump.
The coolant enters the engine by way of the lower radiator hose and exits the engine by way of the upper radiator hose.
flow to
put coolant into my over flow car was running hot and the coolant erupted like a volcano on the side of the over flow
over heating ,bad radiator cap or blown head gasket
in which direction does the river Shannon flow?
Thermostat has to open to allow fluid flow. The supply hose to the heater core is located before the thermostat, forcing the coolant through the core even as the coolant is heating up. Water pump has to work properly to cause fluid to flow. Temperature control (lever) has to operate properly to allow fluid flow. System must not be air-bound to allow fluid flow Heater core must not be plugged
Blood flow doesn't change direction. They always head for the same direction.
Downward, Downriver, Downhill, the direction gravity pulls everything.
The presence of the valves usually restrict the coolant flow into the heater core.