Thermostat Valve — Nissan Gravite
Category: Cooling | Severity: high | Cost: ₹800–₹3,500
What is Thermostat Valve?
Thermostat regulates coolant flow based on engine temperature.
How Thermostat Valve Works
Opens and closes valve to maintain optimal engine temperature.
Why is Thermostat Valve Important?
Ensures quick warm-up and prevents overheating.
Common Problems
- Stuck open
- Stuck closed
- Delayed response
Symptoms
- Overheating
- Poor fuel efficiency
- Slow engine warm-up
Causes of Failure
- Wear and tear
- Coolant contamination
Impact on Car Performance
Can reduce engine efficiency by 10–15%.
DIY Fix Guide — Step by Step
- Check temperature readings
- Inspect housing
- Replace faulty unit
Maintenance Tips
- Replace during major service
- Use clean coolant
Replacement Cost in India
Estimated range: ₹800 – ₹3,500
Where to Buy Online
When to Replace Thermostat Valve
Replace every 60,000–80,000 km or when faulty.