COMPRESSIONStellite® Valves & RotatorsFig. 21 - Counterboring for Valve SeatValves, Valve ConversionsThe life of a valve is considered to be the period of timethe valve will operate before repair or replacement isnecessary. The life of a standard exhaust valve is oftenshortened because of burning, which occurs whenpieces of combustion deposit lodge between the valveseat and valve face, preventing the valve from closingcompletely. This is most likely to occur on engines whichare operated at constant speed and constant load, forlong periods of time. Exhaust valve life can be extendedby using:1.A Rotocap (Valve Rotator), which turns the exhaustvalve a slight bit on each lift, wiping away anydeposits which tend to lodge between the valve faceand seat, or,2.A Stellite® Exhaust Valve which has a greaterresistance to heat.Standard Valve and RotocapStellite® Valve OnlyStellite® valve and RotocapUse Table 5 below, Table 6 on page 10 or Table 7 onpage 11 for Part Numbers.TABLE NO. 5STELLITE® VALVE AND ROTOCAP CONVERSIONROTOCAP ONLY CONVERSIONSTELLITE®BASIC MODEL SERIESVALVESPRINGROTOCAPRETAINERPINALUMINUM CYLINDER60000*, 80000*, 82000*, 92000*, 94000*26044326826292259230127230126100000, 13000026086026826292259230127230126140000, 170000, 190000, 200000, 2500003904202682829226093630CAST IRON CYLINDER14, 19, 190000, 20000026735268282922606828323, 2300002612072682829226068283240000, 300000, 3200002612072682829226068283(Stellite® Std.)*To use Rotocap only #26973 standard valve must be used.NOTE: Rotocap not used with LP Gas on 6, 8 and 10 cu. in. engine.9
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