Cylinder Head Assembly: Specifications

SPECIFICATIONS
Valve timing
Intake valve
Opens (BTDC) 16.5°
Closes (ABDC) 55.5°
Exhaust valve
Opens (BBDC) 48.5°
Closes (ATDC) 15.5°
Camshaft
Drive mechanism Cogged type belt
Cam height intake 35.098 - 35.298 mm (1.3818 - 1.3897 in.)
Cam height exhaust 34.81 - 35.01 mm (1.3705 - 1.3783 in.)
Journal diameter 25.951 - 25.970 mm (1.0220 - 1.0224 in.)
Bearing oil clearance 0.05 - 0.09 mm (0.0007 - 0.0024 in.)
End play 0. 1 - 0. 15 mm (0.0039 - 0.0059 in.)
Cylinder head
Flatness of gasket surface Max. 0.03 mm (0.0012 in.)
Flatness of mounting
Surface
Intake Max. 0.5 mm (0.0197 in.)
Exhaust Max, 0.15 mm (0.0059 in.)
Valve guide hole diameter
0.05 (0.002) O.S. 12.05 - 12.068 mm (0.474 - 0.475 in.)
0.25 (0.010) O.S. 12.25 - 12.268 mm (0.482 - 0.483 in.)
0.50 (0.20) O.S. 12.50 - 12.518 mm (0.492 - 0.493 in.)
Intake valve seat ring hole diameter
0.3 (0.012) O.S. 36.30 - 36.325 mm (1.429 - 1.430 in.)
0.6 (0.024) O.S. 36.60 - 36.625 mm (1.441 - 1.442 in.)
Exhaust valve seat ring hole diameter
0.3 (0.012) O.S. 33.30 - 33.325 mm (1.311 - 1.312 in.)
0.6 (0.024) O.S. 33.60 - 33.625 mm (1.323 - 1.324 in.)
Valve
Overall length
Intake
Specification 106.28 mm (4.184 in.)
Limit 105.78 mm (4.165 in.)
Exhaust
Specification 105.4 mm (4.150 in.)
Limit 104.9 mm (4.130 in.)
Stem diameter
Intake 6.565 - 6.580 mm (0.258 - 0.259 in.)
Exhaust 6.530 - 6.550 mm (0.257 - 0.258 in.)
Face angle 45° - 45.5°
Margin
Intake
Specification 1.0 mm (0.0394 in.)
0.5 mm (0.0197 in.)
Exhaust
Specification 1.5 mm (0.059 in.)
1.0 mm (0.0394 in.)
Clearance (stem - to - guide)
Intake
Specification 0.02 - 0.05 mm (0.0009 - 0.0020 in.)
Limit 0.1 mm (0.0039 in.)
Exhaust
Specification 0.05 - 0.085 mm (0.0020 - 0.0033 in.)
Limit 0.15 mm (0.0059 in.)
Valve spring
Free height
Specification 46.4 mm (1.8268 in.)
Limit 45.4 mm (1.7874 in.)
Lode 24.0 kgf / 37.9 mm (53 lb 1.492 in.)
Out of squareness
Specification Max 2°
Limit 4°
Valve guide
Length
Intake 45.5 mm (1.7913 in.)
Exhaust 50.5 mm (1.9882 in.)
Service oversize 0.05, 0.25, 0.50
Valve seat contact width
Intake 0.9 - 1.3 mm (0.035 - 0.051 in.)
Exhaust 0.9 - 1.3 mm (0.035 - 0.051 in.)
Service oversize 0.30, 0.60
Seat angle
Intake 20°
Exhaust 45°

TIGHTENING TORQUE
Cylinder head cover bolts 7.8 - 9.8 Nm (80 - 100 kg-cm, 5.8 - 7.2 ft. lbs.)





Cylinder head bolts
Cold engine 105 - 115 Nm (1050 - 1150 kg-cm, 75 - 82 ft. lbs.)
Exhaust manifold to engine 40 - 45 Nm (400 - 450 kg-cm, 29 - 32 ft. lbs.)
Intake manifold to engine 20 - 23 Nm (200 - 230 kg-cm, 14 - 17 ft. lbs.)
Intake manifold to cylinder head nuts; 12 - 15 Nm (120 - 150 kg-cm, 9 - 11 ft. lbs.)
Exhaust manifold to cylinder head nuts; 25 - 30 Nm (250 - 300 kg-cm, 18 - 22 ft. lbs.)
Camshaft bearing cap
Outer 19 - 21 Nm (190 - 210 kg-cm, 14 - 15 ft. lbs.)
Inner 10 - 12 Nm (110 - 120 kg-cm, 7 - 9 ft. lbs.)