Thermostat is stuck or water pump is bad or radiator is clogged. Start with the thermostat because it is the most likely and the cheapest to repair. Good luck
Generally thru the use of a belt driven centrifugal pump
The coolant should circulate through the entire water system.
A few of the reasons: 1. So that the coolant does not leak out of the system. 2. So that the coolant can be made to circulate through the pipes (pressure is required). 3. So that Pressure can build up in the cooling system. This allows the coolant to reach a higher temperature before boiling. Once at its boiling point, the temperature will not rise, and additional cooling is inhibited.
The Automotive Water Pump In general the main purpose of the automotive water pump is to circulate the coolant of the cooling system of a water-cooled engine.
You might have a blockage somewhere, or you might need to replace the thermostat.
it goes into your radiator, and then through your cooling system
Pressure test the cooling system, or a leak down test to determine if its a blown head gasket. Combustion gases can leak into the cooling system via a blown headgasket, causing air bubbles, not allowing the coolant to circulate and causing an overheating engine.
The main components of a cooling system typically include a coolant reservoir, radiator, water pump, thermostat, and cooling fans. The coolant reservoir stores the coolant fluid, while the radiator dissipates heat from the engine. The water pump circulates the coolant throughout the system, and the thermostat regulates the coolant flow based on temperature. Cooling fans help to enhance airflow through the radiator, particularly at lower speeds.
faulty pressure cap or center housing has rusted through to the outer seal ...
Sounds like you may have a bad head gasket.It will leak exhaust into the cooling system and create alot of pressure
To flush the cooling system in a Chevy 305, start by ensuring the engine is cool, then disconnect the lower radiator hose to drain the coolant into a suitable container. Use a garden hose to flush water through the system until it runs clear, then close the drain and refill the system with a 50/50 mix of coolant and distilled water. Run the engine with the heater on high for a few minutes to circulate the new coolant, and check for any leaks before sealing everything back up. Finally, monitor the coolant levels and top off as needed.
To prevent air from getting trapped in the cooling system when replacing coolant, ensure the vehicle is on a level surface and the engine is cool before starting. Use a vacuum fill tool, if available, to remove air effectively while filling the system. Additionally, fill the radiator slowly and keep the heater on to allow coolant to circulate through the heater core, helping to release trapped air. Finally, regularly check and top off the coolant level after the system has been run to ensure all air has been purged.