Radiator Cap
Cooling System
Seals the cooling system and regulates internal pressure.
The radiator cap maintains cooling system pressure, which raises coolant's boiling point, and releases excess pressure through a relief valve to prevent damage. Its seal and spring weaken over time, reducing pressure control.
⚠️ Owners Often Notice
If the Radiator Cap is starting to fail, these are the signs owners most commonly report before it gets worse:
Coolant loss without a visible leak
Engine overheating
Steam from under the hood
Hissing sound from the cap
Related Services
Services commonly performed on or around this part.
Replace Radiator Cap
No standard interval on file
Inspect Radiator Cap
No standard interval on file