Cylinder Head (X 16 XEL, Y 16 XE, Z 16 XE, X 18 XE1, Z 18 XE, Z 18 XEL) Illustration
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
7 Valve seat angle at valve
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Cylinder Head (Continued)
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Engine |
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X 16 XEL, Y 16 XE, Z 16 XE |
X 18 XE1, Z 18 XE, Z 18 XEL |
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Cylinder head height 1) |
mm |
134.90 - 135.10 |
135.7 |
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Valve seat width in cylinder head |
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Intake valve |
mm |
1.00 - 1.40 |
1.00 - 1.40 |
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Exhaust valve |
mm |
1.40 - 1.80 |
1.40 - 1.80 |
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Valve seat angle in cylinder head |
° |
90 ° 30' |
90 ° 30' |
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Valve guide inside diameter |
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Standard size |
mm |
6.000 - 6.012 |
5.000 - 5.012 |
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Oversize (0.075) |
mm |
6.075 - 6.090 |
5.075 - 5.087 |
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Oversize (0.150) |
mm |
6.150 - 6.165 |
5.150 - 5.162 |
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Length of valve guide |
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Intake valve |
mm |
44.75 - 45.25 |
38.70 - 39.30 |
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Exhaust valve |
mm |
34.75 - 35.25 |
38.70 - 39.30 |
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Installation height of valve guide |
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Intake valve |
mm |
10.70 - 11.00 |
10.70 - 11.00 |
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Exhaust valve |
mm |
10.70 - 11.00 |
10.70 - 11.00 |
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Installation height of valves |
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Standard size |
mm |
39.60 - 40.20 |
- |
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Oversize |
mm |
39.20 - 39.80 |
- |
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Oversize |
mm |
39.20 - 39.80 |
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1) Resurfacing of the cylinder head is not permitted.
Cylinder Head (Continued)
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Engine |
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X 16 XEL, Y 16 XE, Z 16 XE |
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) |
mm |
102.92 - 103.32 |
101.20 - 101.60 |
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Exhaust valve (GM) |
mm |
102.02 - 102.42 |
100.56 - 100.96 |
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Oversize (0.075) |
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Intake valve (GM K1) |
mm |
102.52 - 102.92 |
- |
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Exhaust valve (GM K1) |
mm |
101.62 - 102.02 |
- |
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Oversize (0.150) |
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Intake valve (GM K2) |
mm |
102.52 - 102.92 |
- |
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Exhaust valve (GM K2) |
mm |
101.62 - 102.02 |
- |
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Ø Valve stem |
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Standard size |
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Intake valve (GM) |
mm |
5.955 - 5.970 |
4.955 - 4.970 |
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Exhaust valve (GM) |
mm |
5.935 - 5.950 |
4.935 - 4.950 |
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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 |
6.010 - 6.025 |
- |
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Oversize (0.150) |
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Intake valve (GM K2) |
mm |
6.105 - 6.120 |
- |
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Exhaust valve (GM K2) |
mm |
6.085 - 6.100 |
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Cylinder Head (Continued)
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Engine |
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X 16 XEL, Y 16 XE, Z 16 XE |
X 18 XE1, Z 18 XE, Z 18 XEL |
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Valve stem play |
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Intake valve |
mm |
0.03 - 0.06 |
0.03 - 0.06 |
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Exhaust valve |
mm |
0.04 - 0.07 |
0.05 - 0.077 |
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Perm. runout of the valve stem |
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Intake valve |
mm |
0.03 |
0.03 |
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Exhaust valve |
mm |
0.03 |
0.03 |
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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 16 XEL, Y 16 XE, 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 |
mm |
8.50 |
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Exhaust |
mm |
8.00 |
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Radial runout |
mm |
0.040 |
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End play |
mm |
0.040 - 0.144 |
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