Checking the rocker arm geometry should be a step whenever assembling an engine, even if standard stamped-steel rockers are used. Follow along as SUPER CHEVY takes the mystery out of this procedure.

But, geometry, being a finite resultant, necessitates that all systems hold to certain tolerances when it comes to correct VTG.

In addition, the geometry of the stand helps ensure that the rocker tip stays centered over the valve stem at the correct time.

Most stud-mounted, stamped rocker arms use a half-spherical pivot ball to support the rocker arm on the stud. That area generates enormous friction and heat, which can lead to rocker-arm failure.