Hot oil getting into the water.
Typically seen when the head gasket is blown.
It flows in the bottom hose of the radiator and out the top hose.
No. The reservoir holds the coolant that flows back into when the engine coolant expands and will flow from the reservoir to the engine when the water cools. but there is no actual through current of liquid. Yes indeed it does on a lot of European vehicles. This occurs mainly in automatic coolant bleed vehicles.
Coolant enters the water pump from the lower radiator hose. The water pump pumps coolant into both sides of the engine block towards the rear of the block. Coolant then flows up into the cylinder heads and flows toward the front of the heads before crossing over into the intake manifold and up to the thermostat. Coolant then flows through the thermostat into the upper radiator hose back into the radiator.
you probably have a blocked heater tap. the heater cools down and there isn't enough coolant flow through the heater tap to keep it warm
Cash flows and fund flows
When the engine heats up to a certain temperature, the thermostat opens up and lets the coolant flow through the engine. Heat from the engine is absorbed by the coolant, which then cycles back to the radiator. Heat from the coolant is exchanged to the air which flows through the radiator fins, thus causing the coolant to rapidly cool down.
Air flow through radiator restricted with debris. Coolant flow through inside of radiator restricted with debris. Low on coolant. Faulty thermostat. Coolant fans inop.
It is important how heat flows because if heat didn't flow the way it does it would be to cold and we wouldn't be here.
If starting from empty pull the top radiator hose off the engine and fill the radiator until coolant starts to flow from the engine hose bib. replace and tighten hose. Fill the overflow tank with coolant. Locate the vent on the coolant hose bib (brass fitting), start the engine and allow coolant flow to purge the air from the system. When coolant flows steadily close the vent. Re-top up the overflow tank.
Yes, it controls the coolant flow around the engine block, without coolant the engine would overheat.
If the temp gauge reads normal and the engine is not overheating, the thermostat is doing its job. The thermostat maintains the coolant temp by opening and closing allowing the coolant to flow or not to flow. When it is closed the coolant doesn't circulate.
put coolant into my over flow car was running hot and the coolant erupted like a volcano on the side of the over flow