my car overheats
You may want to check the radiator fan for proper operation or even consider getting an uprated one. Also the radiator itself may be (partially) blocked, do a backflush of the radiator and check for any airflow obstructions in the radiator, give it a good blast of compressed air from the rear of the radiator to dislodge anything that's stuck between the radiator fins.
Yeah.. I also agree.. Sounds like it may be time to service the coolant system.
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