How Does Honda VTEC Work?

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Here's how Honda's VTEC works yo!


VTEC stands for Variable Valve Timing & Lift Electronic Control. It is responsible for varying the duration, timing and lift of the valve inside an overhead cam engine. In this video, a Honda J32 V6 engine is completely torn down to investigate how the VTEC system works.


During lower RPM's, a rocker arm follows a shallow cam profile, to allow a fixed amount of air to enter or exhaust the engine for fuel efficiency. At higher RPM's, a mechanism engages the rocker arm to follow a larger cam profile, increasing the lift, shifting the timing and increasing duration resulting in more power.


VTEC has been used on Honda and Acura products widely in the 90's, and was further refined in the 2000's when it was combined with variable valve timing, coining the term, i-VTEC. Honda has since released multiple versions of this technology, such as VTEC with multiple changeover points, on either the intake or exhaust or both, and combined it with VVT.


To learn how variable valve timing works, check out my video below:



Find out why Honda V6 engines have been around for so long and watch a full complete tear down, check out my video here:



Learn more about how engine lubrication systems work:



Skip to section in the video:
0:00 Introduction
0:54 Top End Teardown
1:33 VTEC operation
3:10 Engine Teardown
5:45 How VTEC Works
9:58 Oil Lubrication System
11:45 Conclusion


Keep your engine well lubricated with good quality oil and filters you can purchase here:
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