Motorcycle Glossary
Water pump
In Turkish: Devirdaim
In short
The water pump circulates coolant between the engine and the radiator in liquid-cooled engines.
On motorcycles the water pump is usually driven mechanically by the engine; its shaft has a mechanical seal and an oil seal that separate the oil and coolant sides. A small weep hole in the housing reveals a leaking seal.
Symptoms of a problem
- Coolant or oil weeping from the weep hole
- Milky engine oil (coolant contamination)
- Overheating, noise from the pump
Also known as (including Turkish names)
- Su pompası
- Devir daim
Related products
Water Pumps & Thermostats
Last updated: October 9, 2026
