Originally Posted by sidemarker

i should get news today if they will cover it under warranty!

hope i dont get screwed!

sidemarker

Originally Posted by allmotor_2000

With VTEC you have a high lift/duration cam lobe which is used after a certain RPM. Oil pressure (controlled by the VTEC solenoid) pushes a pin which locks the center lobe (high profile 'vtec' lobe) to the rocker assembly. When not in 'vtec', the regular (or adjacent) cam lobes are used. On SOHC VTEC cars, the extra lobe is only available on the intake side while on the DOHC VTEC cars, it is available on the intake and exhaust side. On the new i-VTEC motors, you get cam timing adjustment in addition to variable valve lift - its like having an adjustable cam sprocket which adjusts as RPMs change!! I believe this is only active on the intake-side, but I may be mistaken. I am sure the new NSX is DOHC i-VTEC - meaning variable valve lift and cam timing on the intake and exhaust!!

If you open up an integra DOCH VTEC motor, you will see three rocker-arms/cylinder on each side. The center one is used only during VTEC - The cams also have three lobes/cylinder with the center one being the 'hi-cam' or 'vtec' profile.