Cylinder Head
- 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
Cylinder Head (Continued)
| Engine | | Z 12 XE, Z 12 XEP, Z 14 XEP |
|---|
| Cylinder head height 1) | mm | 126 |
| Valve seat width in cylinder head | | |
| Intake valve | mm | 1.0 - 1.4 |
| Exhaust valve | mm | 1.4 - 1.8 |
| Valve seat angle in cylinder head | | 90° |
| Valve guide inside diameter | mm | |
| Standard size | mm | 4.988 - 5.007 |
| Oversize (0.075) | mm | 5.063 - 5.082 |
| Oversize (0.150) | mm | 5.138 - 5.157 |
| Length of valve guide | | |
| Intake valve | mm | 38.75 - 39.25 |
| Exhaust valve | mm | 38.75 - 39.25 |
| Installation height of valve guide | | |
| Intake valve | mm | 11.70 - 12.00 |
| Exhaust valve | mm | 11.70 - 12.00 |
| Installation height of valves | | |
| Standard size | mm | 31.20 - 32.20 |
| Oversize (0.075) | mm | 30.80 - 31.90 |
| Oversize (0.150) | mm | 30.80 - 31.90 |
| Engine | | Z 12 XE, Z 12 XEP, Z 14 XEP |
|---|
| Valve length | | |
| Standard size | | |
| | Intake valve (GM) | mm | 93.65 - 94.05 |
| | Exhaust valve (GM) | mm | 93.65 - 94.05 |
| Oversize (0.075) | | |
| | Intake valve (GM K1) | mm | 93.25 - 93.65 |
| | Exhaust valve (GM K1) | mm | 93.25 - 93.65 |
| Oversize (0.150) | | |
| | Intake valve (GM K2) | mm | 93.25 - 93.65 |
| | Exhaust valve (GM K2) | mm | 93.25 - 93.65 |
| Ø Valve stem | | |
| Standard size | | |
| | Intake valve (GM) | mm | 4.955 - 4.970 |
| | Exhaust valve (GM) | mm | 4.945 - 4.960 |
| Oversize (0.075) | | |
| | Intake valve (GM K1) | mm | 5.030 - 5.045 |
| | Exhaust valve (GM K1) | mm | 5.020 - 5.035 |
| Oversize (0.150) | | |
| | Intake valve (GM K2) | mm | 5.105 - 5.120 |
| | Exhaust valve (GM K2) | mm | 5.095 - 5.110 |
| Engine | | Z 12 XE, Z 12 XEP, Z 14 XEP |
|---|
| Valve stem play | | |
| Intake valve | mm | 0.018 - 0.052 |
| Exhaust valve | mm | 0.028 - 0.062 |
| Perm. runout of the valve stem | mm | 0.03 |
| Ø Valve head | | |
| Intake valve | mm | 27.90 - 28.10 |
| Exhaust valve | mm | 24.90 - 25.10 |
| Valve seat angle at valve head | mm | 90° 40' |
| Valve rotator | | |
| Intake valve | | none |
| Exhaust valve | | none |
| Engine | | Z 12 XE | Z 12 XEP | Z 14 XEP |
|---|
| Camshaft | | | | |
| Roller cam follower ratio | | 1 : 1.863 |
| Valve lift | | | | |
| | Intake | mm | 7.06 | | 8.50 |
| | Exhaust | mm | 7.56 |
) Resurfacing of the cylinder head is not permitted.
