What does CVVT stands for & how does VVT work? Symptoms of a bad VVT?

Posted by Candy Lai on

CVVT(Continuously Variable Valve Timing) System
The CVVT (called also VVT), positioned on hyundai sonata exhaust camshaft, controls the open & close timing of intake valve to improve engine performance. CVVT system adjusts the intake valve timing depending on engine rpm.

Pros of Camshaft gear CVVT
1. Fuel Consumption Reduction
With VVT overlapping time adjustment of intake & exhaust valves, more air can get into engine in time. So it reduces fuel consumption and improves oil efficiency.

2.Emission reduction for environment friendly.
VVt design has efficiently reduced NOX emission by EGR effect since 2007.

3.Torque increased at low speed so car performance improved

Symptoms of a Bad or Failing Variable Valve Timing (VVT)
1. Poor Fuel Economy Performance
2. Check Engine Light On
3. Engine Rough Idle
Too much oil will flow into VVT if gears malfunction and this will lead to engine's rough idling.
4. Poor Acceleration

Similar to Kia Optima exhaust, Hyundai Santa Fe Variable Valve Timing (VVT) Replacement costs around $157 to $380 depends on serious level. Any above symptoms occurs, better have repair shop to check your car first.
Earlier you sort out the problems, cheaper cost you may need to spend.

Related Reading:
<Ways to longer Camshaft Variable Valve Timing VVT gear lifetime>

<hyundai Parts sonata engine parts>

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