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Cylinder head
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Illustration
| 1. |
Cylinder head height |
| 2. |
Installation height of valve guide |
| 3. |
Installation height of valve |
| 4. |
Valve seat width in cylinder head |
| 5. |
Valve seat angle in cylinder head |
| 6. |
Valve stem diameter |
| 7. |
Valve seat angle at valve |
| 8. |
Valve length |
| 9. |
Valve head – diameter |
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Engine
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X 14 XE, Z 14 XE, X 16 XEL, Z 16 XE
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X 18 XE1, Z 18 XE, Z 18 XEL
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Cylinder head height 1)
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mm
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134.90 – 135.10
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135.85 – 136.0
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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° -30'
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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 – 6.014
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5.000 – 5.012
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Oversize (0.075)
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mm
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6.075 – 6.090
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5.075 – 5.087
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Oversize (0.150)
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mm
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6.150 – 6.165
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5.150 – 5.162
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Length of valve guide
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Intake valve
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mm
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44.75 – 45.25
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38.7 – 39.3
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Exhaust valve
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mm
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34.75 – 35.25
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38.7 – 39.3
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Installation height of valve guide
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Intake valve
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mm
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10.7 – 11.0
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Exhaust valve
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mm
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10.7 – 11.0
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Installation height of valves
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Standard size
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mm
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38.15 – 38.85
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38.5 – 39.2
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Oversize (0.075)
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mm
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37.75 – 39.25
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38.1 – 39.6
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Oversize (0.150)
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mm
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37.75 – 39.25
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38.1 – 39.6
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Engine
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X 14 XE, Z 14 XE, X 16 XEL, Z 16 XE
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X 18 XE1, Z 18 XE, Z 18 XEL
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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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102.92 – 103.32
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101.2 – 101.6
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Exhaust valve (GM)
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mm
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102.02 – 102.42
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100.56 – 100.96
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Oversize (0.075)
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Intake valve (GM K1)
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mm
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102.52 – 102.92
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100.8 – 101.2
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Exhaust valve (GM K1)
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mm
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101.62 – 102.02
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100.16 – 100.56
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Oversize (0.150)
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Intake valve (GM K2)
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mm
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102.52 – 102.92
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100.8 – 101.2
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Exhaust valve (GM K2)
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mm
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101.62 – 102.02
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100.16 – 100.56
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Ø
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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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4.955 – 4.970
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Exhaust valve (GM)
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mm
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5.930 – 5.945
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4.935 – 4.950
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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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5.030 – 5.045
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Exhaust valve (GM K1)
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mm
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6.005 – 6.020
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5.010 – 5.025
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Oversize (0.150)
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Intake valve (GM K2)
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mm
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6.105 – 6.120
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5.105 – 5.120
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Exhaust valve (GM K2)
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mm
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6.080 – 6.095
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5.085 - 5.100
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Engine
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X 14 XE, Z 14 XE, X 16 XEL, Z 16 XE
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X 18 XE1, Z 18 XE, Z 18 XEL
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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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0.050 – 0.077
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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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30.9 – 31.1
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31.1 – 31.3
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Exhaust valve
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mm
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27.4 – 27.6
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27.4 – 27.6
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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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No code
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Exhaust valve
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No code
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Engine
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X 14 XE, Z 14 XE, X 16 XEL, Z 16 XE, X 18 XE1, Z 18 XE, Z 18
XEL
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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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8.50
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Exhaust
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mm
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8.00
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1 ) Resurfacing of the cylinder head is not
permitted.
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