Thermostat
Also asked for as: thermostat, thermostat valve
What it does
Holds coolant in the engine until it warms up, then opens to the radiator.
Signs it needs replacing
- Engine takes very long to warm up
- Temperature needle swings
- Overheats soon after starting
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