56 486 PL ENGINE P ASSEMBLY OF THE CYLINDER HEAD : Ensure that the hollow dowels are placed in their respective position i. e. one in the cylinder head and other in cam shaft caps. Install spring seat If required press valve guide seal with the help of dolly. Install valves in their respective position. Place valve springs and retainer over it. Press the valve spring with the help of spring compressor (Pt No. 2699 5890 0603) and install half lock with help of grease & wire. Fig. 127 Ensure that the two grooves are properly located. Smear tappet outside diameter with engine oil and place it over valve. Fig. 128 Smear cam shafts journals and cam lobes with moly paste grease. The exhaust cam shaft is with bigger boss at front on which the timing gear is to be bolted. Fig. 129 Ensure that inlet cam shaft has a pin at rear end. Press thin pin in both the cam shafts and then press sprocket over it aligning its slot with pin. Place chain over both the sprockets & place tensioner. Place both the cam shafts simultaneously with chain and chain tensioner on cylinder head bearings. Fig. 130 Align the slots on rear sides of both the cam shafts horizontally so that it would be easier to check the timing afterwards by inserting timing plate in the slot. Fig. 130 Fig. 129 Fig. 128 Fig. 127 EXH. CAM SHAFT INTAKE CAM SHAFT
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