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Cylinder head - DOHC II
Illustration
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1
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Cylinder head height
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2
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Installation height of valve guide
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3
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Installation height of valve
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4
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Valve seat width in cylinder head
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5
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Valve seat angle in cylinder head
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6
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Valve stem diameter
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7
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Valve seat angle at valve
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8
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Valve length
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9
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Valve head – diameter
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Engine
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X 20 XEV, Y 22 XE, Z 22 XE
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Cylinder head height 1)
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mm
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134
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Valve seat width in cylinder head
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Intake valve
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mm
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1.0 - 1.4
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Exhaust valve
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mm
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1.4 - 1.8
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Valve seat angle in cylinder head
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90°
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Valve guide inside diameter
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Standard size
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mm
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6.000 - 6.012
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Oversize (0.075)
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mm
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6.075 - 6.090
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Length of valve guide
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Intake valve
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mm
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44.70 - 45.30
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Exhaust valve
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mm
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34.70 - 35.30
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Installation height of valve guide
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Intake valve
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mm
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13.7 - 14.0
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Exhaust valve
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mm
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13.7 - 14.0
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Installation height of valves
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Standard size
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mm
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39.6 - 40.2
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Oversize (0.075)
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mm
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39.2 - 39.8
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Engine
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X 20 XEV, Y 22 XE, Z 22 XE
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Valve length
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Standard size
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Intake valve (GM)
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mm
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101.90 - 102.30
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Exhaust valve (GM)
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mm
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92.05 - 92.45
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Oversize (0.075)
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Intake valve (GM K1)
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mm
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101.50 - 101.90
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Exhaust valve (GM K1)
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mm
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91.65 - 92.05
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Ø Valve stem
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Standard size
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Intake valve (GM)
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mm
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5.955 - 5.970
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Exhaust valve (GM)
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mm
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5.945 - 5.960
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Oversize (0.075)
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Intake valve (GM K1)
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mm
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6.030 - 6.045
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Exhaust valve (GM K1)
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mm
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6.020 - 6.035
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Engine
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X 20 XEV, Y 22 XE, Z 22 XE
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Valve stem play
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Intake valve
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mm
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0.030 - 0.057
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Exhaust valve
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mm
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0.040 - 0.067
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Perm. runout of the valve stem
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mm
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0.03
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Ø Valve head
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Intake valve
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mm
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31.9 - 32.1
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Exhaust valve
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mm
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28.9 - 29.1
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Valve seat angle at valve head
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90° 40'
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Valve rotator
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Intake valve
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none
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Exhaust valve
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none
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Engine
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X 20 XEV, Y 22 XE, Z 22 XE
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Camshaft
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Cam lift
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Intake
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mm
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9.2
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Exhaust
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mm
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9.2
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1 ) Resurfacing of the cylinder head is not
permitted.
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