Cylinder Head Assembly: Specifications
Cylinder Head and Valve TrainCylinder head gasket surface flatness 0.12 mm (0.004 inch)
Combustion chamber volume 45.7 ± 1.5 cc
Valve arrangement (front to rear) 0.175 - 0.225 mm (0.0069 - 0.0089 inch)
Valve clearance-intake 0.325 - 0.375 mm (0.0128 - 0.0148 inch)
Valve clearance-exhaust 5.492 - 5.477 mm (0.216 - 0.215 inch)
Valve guide bore diameter 5.479-5.464 mm (0.215 inch)
Valve stem diameter (standard)-intake 0.022 - 0.067 mm (0.0008 - 0.0026 inch)
Valve stem diameter (standard)-exhaust 0.035 - 0.080 mm (0.001 - 0.003 inch)
Valve stem-to-guide clearance-intake 35 mm (1.38 inch)
Valve stem-to-guide clearance-exhaust 0.035 - 0.080 mm (0.001 - 0.003 inch)
Valve head diameter-intake 35 mm (1.38 inch)
Valve head diameter-exhaust 30 mm (1.18 inch)
Valve head diameter-gauge diameter 33.5 and 28.0 mm (1.318 and 1.102 inch)
Valve face runout 0.02 mm (0.007 inch)
Valve face angle 45.5 degrees
Valve seat width-Intake 1.1 - 1.4 mm (0.043 - 0.055 inch)
Valve seat width-Exhaust 1.4 - 1.7 mm (0.055 - 0.066 inch)
Valve seat runout 0.04 mm (0.001 inch)
Valve seat angle 89 - 90 degrees
Valve spring free length (approximately) 44.2 mm (1.740 inch)
Valve spring compression Pressure (N @ spec. length) 400 ± 22 at 24.5 mm (89.92 ± 4.94 at 0.964 inch)
Valve spring installed Pressure (N @ spec. length) 175 ± 10 at 33.41 mm (39.34 ± 2.24 at 1.315 inch)
Cylinder head temperature (CHT) sensor 15 Nm (11 ft. lbs.)
LH:
RH:
Cylinder Head bolts.
Step 1 30 Nm (22 ft. lbs.)
Step 2 90 degrees
Step 3 Back out a minimum of one full turn (360 degrees)
Step 4 30 Nm (22 ft. lbs.)
Step 5 90 degrees
Step 6 90 degrees
Camshaft Bolts
Upper Intake Manifold
Lower Intake Manifold
Exhaust manifold bolts.
Step 1 20 Nm (15 ft. lbs.)
Step 2 20 Nm (15 ft. lbs.)