r Face angle 45 Cutter diameter 1 50 Exhaust Material High alloy stee Overall length 4 494 4 51 Overall head diameter 1 235 1 24 Seat angle in head 45 Stem diameter 001 taper 3410 3417 top 3400 3407 bottom Stem to Guide Clearance New 0015 003 Worn 002 00 Lift 34 Face angle 44 I Cutter diameter 1 361 VALVE SPRINGS Turbo Air Valves Closed Inlet and Exhaust 1 508 58 641bs Valves Opened Inlet and Exhaust 1 148 141 1491bs Free Length Inlet and Exhaust 1 79 Super Turbo Air Valves Closed Inlet and Exhaust 1 696 69 791bs Valves Opened Inlet and Exhaust 1 306 159 1691bs Free Length Inlet and Exhaust 2 01 PISTONS Type Slipper skir Material Cast alloy aluminun Top Land Clearance 022 03 Skirt Clearance 0011 001 Compression Ring Groove Depth 193 191 Compression Ring Groove Width 0792 090 Oil Control Ring Groove Depth 194 195 Oil Control Ring Groove Width 188 185 PISTON PINS Type Pressed in roc Material Alloy stee Length 2 630 2 651 Diameter 7999 800 Clearance 00015 0002 Direction of Offset Major thrust side COMPRESSION RINGS Type Inside Bevel Reverse Twist Taper Face Material Cast alloy iror Coating Wear resistani Width 0770 0781 Wall Thickness 162 172 Gap 010 021 OIL CONTROL RINGS Type One piece groove anc slotted construction with slotted expander Material Cast alloy iror Width 1860 1865 I Wall Thickness 143 149 Gap 010 020 l I COOLING SYSTEM GENERAL Type Air cooled by blower Engine enclosed by sheet metal shrouding to direct cooling air over fins on outside of engine cylinders and cylinder head castings Engine temperature regulated by bellows type thermostats in lower shrouds exhaust ducts which I operates exhaust dampers Exhaust damper doors close the blower air exhaust until engine i has obtained the correct operating temperature ENGINE BLOWER Type Centrifugal Location Mounted horizontally on top center of engine between air cleaner and crankcase Material Steel Diameter 11 00 Number of Vanes 24 Driven By V belt Air Flow 1800 cfm ct 4000 engine rpm Engine Blower Pulley PD 4 1875 Ratio blower to engine 1 58 1 Belt Idler Pulley PD 3 32 Bearing Type Sealed permanently lubricated ball bearing I BLOWER PULLEY BELT Type V Length 55 Width 380 005 i Angle of V 40 ENGINE EXHAUST THERMOSTAT i I Type Bellows seamless Make Harrison I Bellows start to open 200 210 F 1 20 Bellows full open 215 225 F 1 70 LUBRICATION SYSTEM l GENERAL l Type Full pressure I Main Bearings Pressure Connecting Rods Pressure i Piston Pins Splash Cylinder Walls Spray Camshaft Bearings Pressure Hydraulic Lifters Pressure Timing Gears Splash OIL PUMP Type Gear Location Mounted in engine rear cover Driven By Distributor I Intake Type Fixed Capacity GPM rpm 9 4000 l CRANKCASE CAPACITY Mt Dry 5 Refill 4