The potential causes of a car radiator leak could be counted on one hand. The leading and most common cause is corrosion in the radiator. Radiators, hoses, and hose connections collect sediment and rust that over time can punch holes in the radiator. In a few instances, weak coolant can be the cause of overheating. Poor service practices also hurt the radiator, though if serviced by a professional, this should not be a problem. For instance, over-filling the radiator can cause leaks from increased water pressure. A bad thermostat or a heater core can also create excessive heat and pressure on the radiator.
Check the level of your radiator and the strength of your coolant while at the service station. Always check the radiator when the engine is cold; never while it’s hot. Ask a car mechanic when you are at the garage to test the fluid. Mechanics routinely check for a radiator leak when they change the oil or do other engine-related work. Often, the invoice has check marks that a mechanic does routinely on a car. If you have questions, talk to the mechanic and ask about the radiator. They’re experts, and they’ll recognize a problem as soon as they see it. Also, when buying coolant, stay away from the cheap stuff.
When it comes to getting your radiator fluid replaced, always have the system flushed. Rust and sediment collecting in the passage ways and hoses can build up and cause a plug. This could cause radiator leaks and make the engine overheat. Rust literally eats holes in the radiator.