* Incorrect installation: Air pockets in the system, a faulty thermostat, or incorrect radiator cap pressure are common culprits.
* Faulty water pump: The pump circulates coolant; a failing pump won't move coolant effectively.
* Head gasket failure: This is a serious problem where coolant leaks into the engine cylinders or vice versa.
* Clogged hoses or radiator: Even a new radiator can become partially blocked if other parts of the system are clogged.
* Faulty fan clutch or electric cooling fan: These components help dissipate heat, and failure will lead to overheating.
* Low coolant level: Make sure the system is properly filled and bled of air.
If your car is running hot after a new radiator installation, do not continue driving it. Overheating can cause significant engine damage. Have the cooling system thoroughly inspected by a qualified mechanic to identify and fix the underlying issue.
