Grinding the valve seat and refacing the valve can remove enough material to cause the assembled height of the valve spring to be out of spec, reducing spring tension. Installing the correct Sealed Power valve spring insert under each valve spring will restore the installed height to factory specs. Insert designs and thicknesses are available to cover nearly every application and ensure maximum engine performance. Push rod seats, pivot areas and contact pads are hardened for long service life and optimum compatibility with associated components. Rocker arm shafts are manufactured from premium-quality steel.
Induction heat treating hardens the shaft surface at critical wear points.
For more information, contact your Federal-Mogul representative.