Variable Valve Timing


Variable valve timing (VVT) is now a standard feature on most modern engines. Diagnosing these systems require a fundamental understanding in its operation. This class will demonstrate how Variable Valve Timing operates. Case studies will be used showing real-world failures and diagnostics.

The learning objectives for this class are:

  • Explain variable valve timing operation
  • Identify VVT components
  • Analyze VVT scan tool data to diagnose faults


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