# Radiator

> A radiator is the heat exchanger in liquid-cooled engines that transfers heat from the hot coolant to the air.

- **Also known as:** Su radyatörü, Soğutma sistemi, Termostat, Fan müşürü
- **Turkish term:** Radyatör
- **Category:** [Radiators, Fans & Switches](https://motorsikletparcasi.com/en/category/radiators-fans-and-switches)
- **Page:** https://motorsikletparcasi.com/en/glossary/radiator

The cooling system consists of the radiator, [water pump](https://motorsikletparcasi.com/en/glossary/water-pump), thermostat, fan and fan switch, and the radiator cap. The thermostat keeps the radiator circuit closed until the engine is warm; the fan switches on as temperature rises.

- Coolant (antifreeze) is usually changed every 2–3 years; it protects against freezing and corrosion.
- Signs of overheating: a rising gauge, a fan that does not run, boiling in the overflow tank.
- Bent or clogged fins reduce cooling; clean them with a soft brush and low-pressure water.

## Related terms

- [Water pump](https://motorsikletparcasi.com/en/glossary/water-pump): The water pump circulates coolant between the engine and the radiator in liquid-cooled engines.

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- Last updated: 2026-10-09
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