System Specifications

Cylinder Head and Valve Train
Cylinder head gasket surface flatness 0.025 mm (0.001 inch) in 2 in. 0.10 mm (0.004 inch) overall
Cylinder head gasket surface finish 63-125 RMS
Combustion chamber volume
Valve arrangement (front to rear) - LH I-E-I-E-I-E-I-E
Valve arrangement (front to rear) - RH E-I-E-I-E-I-E-I
Valve guide bore diameter 0.3141-0.3151 in
Valve stem diameter 7.921-7.939 mm (0.31185-0.31255 inch)
Valve stem-to-guide clearance (max.) 0.140 mm (0.0055 inch)
Valve head diameter
Valve face runout 0.050 mm (0.002 inch)
Valve face angle - intake 30 degrees
Valve face angle - exhaust 37.5 degrees
Valve seat width 1.651-2.413 mm (0.065-0.095 inch)
Valve seat runout (max.) 0.05 mm (0.002 inch)
Valve seat angle - intake 30 degrees
Valve seat angle - exhaust 37.5 degrees
Valve spring free length (approx.) 52.70 � 3.8 mm (2.075 0.150 inch)
Valve spring squareness (max.) 1.981 mm (0.078 inch)
Valve spring compression pressure 32-35 kg @ 6 46.55 mm (71-79 lbs @ 1.833 inch) 102-112 k @ 34.35 mm (225-249 lbs. @ 0 1.352 inch)
Valve spring installed height - intake 44.881 mm (1.767 inch)
Valve spring installed height - exhaust 46.558 mm (1.833 inch)
Valve spring installed pressure
Roller follower ratio
Rocker arm ratio

For torque specifications, refer to the service procedure.