Cylinder head/s – valves
- Make
- Alfa Romeo
- Model
- 159 Factory Service Manual
- Year
- 2005–2011
- Section
- Engine unit › Cylinder head/s – valves
Manufacturing data and tolerancesCylinder head/s – valves
CYLINDER HEAD/S – VALVES
| Measurement | Value | Validity |
|---|---|---|
| Inlet valve stem diameter | 5.900 - 5.940 mm | 1.9 JTS 2.2 JTS |
| Inlet valve stem diameter | 5.982 - 6.000 mm | 1.9 JTD 16V 2.4 JTD 20V |
| Inlet valve stem diameter | 5.955 - 5.975 mm | 3.2 JTS |
| Inlet valve stem diameter | 4.955 - 4.970 mm | 1.8 |
| Exhaust valve stem diameter | 5.900 - 5.940 mm | 1.9 JTS 2.2 JTS |
| Exhaust valve stem diameter | 5.972 ÷ 5.990 | 1.9 JTD 16V 2.4 JTD 20V |
| Exhaust valve stem diameter | 5.945 - 5.965 mm | 3.2 JTS |
| Exhaust valve stem diameter | 4.935 - 4.950 mm | 1.8 |
| Exhaust/inlet valve stem diameter | 7.974 - 7.992 mm | 1.9 JTD 8V |
| Inlet valve stem clearance | 0.030 - 0.061 mm | 1.8 |
| Exhaust valve stem clearance | 0.050 - 0.081 mm | 1.8 |
| Valve stem diameter oversizes | 0.075/0.150 mm | 1.8 |
| Inlet valve head diameter | 34.95 - 35.25 mm | 1.9 JTS 2.2 JTS |
| Exhaust valve head diameter | 29.95 - 30.25 mm | 1.9 JTS 2.2 JTS |
| Inlet valve seat outer diameter | 29.600 - 29.611 mm | 1.9 JTD 16V 2.4 JTD 20V |
| Exhaust valve seat outer diameter | 27.600 - 27.611 mm | 1.9 JTD 16V 2.4 JTD 20V |
| Inlet valve seat outer diameter | 36.039 - 36.064 mm | 1.9 JTD 8V |
| Exhaust valve seat outer diameter | 35.039 - 35.064 mm | 1.9 JTD 8V |
| Valve seat band angle in contact with valve | 45° +/- 1’ | 1.9 JTD 16V 2.4 JTD 20V |
| Valve seat band angle in contact with valve | 45° +/- 20’ | 1.9 JTD 8V |
| Valve recess in relation to cylinder head plane | 0.1 - 0.5 mm | 1.9 JTD 8V |
| Tappet rod outer diameter | 36.975 - 36.991 mm | 1.9 JTD 8V |
| Tappet rod housing diameter | 37.010 - 37.030 mm | 1.9 JTD 8V |
| Inlet valves clearance in closed position | 0.25 - 0.35 mm | 1.9 JTD 8V |
| Inlet valves clearance in closed position | 0.21 - 0.29 mm | 1.8 |
| Exhaust valves clearance in closed position | 0.30 - 0.40 mm | 1.9 JTD 8V |
| Exhaust valves clearance in closed position | 0.27 - 0.35 mm | 1.8 |
| Inlet valve seat width | 1.0 - 1.4 mm | 1.8 |
| Exhaust valve seat width | 1.8 | |
| Valve seat angle | 90° 30’ | 1.8 |
| Inlet valve head diameter | 30.7 - 30.8 mm | 1.8 |
| Exhaust valve head diameter | 27.1 - 27.2 mm | 1.8 |
| Valve head angle | 90° 40’ | 1.8 |
Parts & tools for this job Staging For 2005 Alfa Romeo 159
- PARTEngine gasket setSearch: Alfa Romeo 159 2005 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
Links open Amazon search results in a new tab. As an Amazon Associate I earn from qualifying purchases.