Engine Valves — Nissan Gravite
Category: Engine | Severity: high | Cost: ₹8,000–₹25,000
What is Engine Valves?
Valves regulate the intake of air-fuel mixture and the release of exhaust gases.
How Engine Valves Works
Opened by camshaft lobes and closed by valve springs in precise timing cycles.
Why is Engine Valves Important?
Critical for combustion efficiency and engine breathing.
Common Problems
- Burnt valves
- Carbon deposits
- Valve leakage
Symptoms
- Loss of power
- Rough idling
- Misfire
Causes of Failure
- Overheating
- Poor fuel quality
- Improper timing
Impact on Car Performance
Faulty valves reduce engine compression and efficiency.
DIY Fix Guide — Step by Step
- Check engine compression
- Inspect spark plugs
- Use fuel additives
- Scan engine codes
- Consult mechanic
Maintenance Tips
- Use good fuel
- Regular servicing
- Avoid overheating
Replacement Cost in India
Estimated range: ₹8,000 – ₹25,000
Where to Buy Online
When to Replace Engine Valves
Replace when burnt, bent, or leaking.