System Specifications

Cylinder head and valve train
Cylinder head gasket surface flatness 0.05 mm (0.002 inch) per 51 mm (2 inch), 0.10 mm (0.004 inch) per total surface area
Cylinder head thickness 95 mm (3.74 inch)
Valve arrangement (front to rear) --
Valve guide bore diameter 7.003 - 7.029 mm (0.276 - 0.277 inch)
Valve stem diameter 6.947 - 6.965 mm (0.2735 - 0.272 inch)
Valve stem-to-guide clearance 0.140 mm (0.0055 inch) maximum
Valve head diameter --
Valve face runout (T.I.R. max) 0.038 mm (0.015 inch)
Valve face angle
Exhaust 37.5 degrees
Intake 30 degrees
Valve seat width
Exhaust 1.80 - 2.56 mm (0.071 - 0.101 inch)
Intake 1.48 - 2.24 mm (0.058 - 0.088 inch)
Valve seat runout 0.0035 mm (0.0014 inch)
Valve seat angle
Exhaust 37.5 degrees
Intake 30 degrees
Valve spring free length 51.96 mm (2.045 inch)
Valve spring solid height 36.1 mm (1.42 inch)
Valve spring compression pressure 46.30 mm @ 340 ± 17 N (1.82 inch 76.5 ± 3.8 ft. lbs.)

For torque specifications, refer to the service procedure.