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Cylinder head
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 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
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Cylinder head height 1)
|
mm
|
140
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Valve seat width in cylinder head
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|
|
|
|
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Intake valve
|
mm
|
1.4 – 1.8
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|
|
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Exhaust valve
|
mm
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1.4 – 1.8
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Valve seat angle in cylinder head
|
|
90°
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Valve guide inside diameter
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Standard size
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mm
|
6.000 – 6.012
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Oversize (0.075)
|
mm
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6.075 – 6.090
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Length of valve guide
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Intake valve
|
mm
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44.75 – 45.25
|
|
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Exhaust valve
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mm
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34.75 – 35.25
|
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Installation height of valve guide
|
|
|
|
|
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Intake valve
|
mm
|
11.2 – 11.5
|
|
|
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Exhaust valve
|
mm
|
11.2 – 11.5
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Installation height of valves
|
|
|
|
|
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Standard size
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mm
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37.0 – 37.6
|
|
|
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Oversize (0.075)
|
mm
|
36.6 – 37.2
|
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Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
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Valve length
|
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|
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Standard size
|
|
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Intake valve (GM)
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mm
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96.90 – 97.30
|
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Exhaust valve (GM)
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mm
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96.90 – 97.30
|
|
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Oversize (0.075)
|
|
|
|
|
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Intake valve (GM K1)
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mm
|
96.50 – 96.90
|
|
|
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Exhaust valve (GM K1)
|
mm
|
96.50 – 96.90
|
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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
|
5.955 – 5.970
|
|
|
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Exhaust valve (GM)
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mm
|
5.945 – 5.960
|
|
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Oversize (0.075)
|
|
|
|
|
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Intake valve (GM K1)
|
mm
|
6.030 – 6.045
|
|
|
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Exhaust valve (GM K1)
|
mm
|
6.020 – 6.035
|
|
Engine
|
|
X 20 DTL, Y 20 DTL, Y 20 DTH, Y 22 DTR
|
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Valve stem play
|
|
|
|
|
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Intake valve
|
mm
|
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
|
mm
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0.03
|
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Ø Valve head
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|
|
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Intake valve
|
mm
|
28.9 – 29.1
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|
|
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Exhaust valve
|
mm
|
25.9 – 26.1
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Valve seat angle at valve head
|
mm
|
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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Camshaft
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Cam lift
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Intake
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mm
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8.5
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|
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Exhaust
|
mm
|
8.5
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1 ) Resurfacing of the cylinder head is not
permitted.
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