Radiator Cap — Nissan Gravite
Category: Cooling | Severity: medium | Cost: ₹300–₹1,200
What is Radiator Cap?
Radiator cap maintains system pressure and prevents coolant loss.
How Radiator Cap Works
It seals the radiator and releases excess pressure through a spring-loaded valve.
Why is Radiator Cap Important?
Maintains boiling point of coolant and system efficiency.
Common Problems
- Pressure leak
- Seal wear
- Valve failure
Symptoms
- Coolant overflow
- Overheating
- Low coolant level
Causes of Failure
- Aging seal
- High pressure cycles
- Cheap replacement
Impact on Car Performance
Improper pressure reduces cooling efficiency by up to 15%.
DIY Fix Guide — Step by Step
- Inspect rubber seal
- Check for cracks
- Replace if loose or worn
Maintenance Tips
- Check during service
- Replace every 40,000 km
Replacement Cost in India
Estimated range: ₹300 – ₹1,200
Where to Buy Online
When to Replace Radiator Cap
Replace if pressure holding capacity fails or seal is damaged.