1999 Volvo Penta "WT" Models Workshop Manual, Page 86Get this manual
eContinue grinding until the valve face is true and smooth all around valveIf this makes the valve thin the valve must be replaced as the valve will overheat and burnfRemove valve from chuck and place stem in "V" blockFeed valve squarely against grinding wheel to grind any pit from rocker arm end of stem [Note[
Only the extreme end of the valve stem is hardened to resist wearDo not grind end of stem excessivelygAfter cleaning valve face and cylinder head valve seat of grinding particles, make pencil marks about inapart across the valve face, place the valve in cylinder head and give the valve one-half turn in each direction while exerting firm pressure on face of valvehRemove valve and check face carefullyIf all pencil marks have not been removed at the point of contact with the valve seat, it will be necessary to repeat the refacing operation and again recheck for proper seatingiGrind and check remaining valves in the same manner,
Assembly