Coolant
Also asked for as: coolant, radiator water
What it does
Carries heat away from the engine and protects the cooling system from rust.
Signs it needs replacing
- Level below the minimum mark
- Coolant looks brown
- Engine runs hot
What to tell the shop
- Vehicle make, model and model year
- Engine size, and whether it is manual or automatic
- The number printed on the old part, or a photo of it
- Whether you want genuine, OEM or a local replacement