Valve guide replacement
- Make
- Alfa Romeo
- Model
- 145/146 Engines, 146 Bodywork and Engine Overhaul Manual
- Year
- 1994–2001
- Section
- Overhauling › Valve guide replacement
Engine overhaul: 2.0 V6 Turbo (AR16202)Valve guide replacement
- Measure the valve stem diameter in at least three points and in mutually orthogonal directions
— Determine the clearance and verify if it ranges within the permissible tolerances; otherwise replace the worn parts
| Valve stem and valve guide inner diameter radial clearance | |
|---|---|
| intake | 0,013 ÷ 0,043 mm |
| exhaust | 0,045 ÷ 0,075 mm |
VALVE GUIDE REPLACEMENT
- Extract the worn valve guides by means of extractor 1.821.005.000
— Measure the valve guide seat diameter and the new valve guide outer diameter: the assembly interference must be within the specified tolerances
| Valve guide seat diameter |
|---|
| 13,990 ÷ 14,018 mm |
| Valve guide outer diameter | ||
|---|---|---|
| intake | 14,033 ÷ 14,044 mm | 14,047 ÷ 14,058 mm * |
| exhaust | 14,033 ÷ 14,059 mm | 14,062 ÷ 14,073 mm * |
* Dimensions referred part supplied as spare
| Interference between valve guide and valve guide seat | |
|---|---|
| intake | 0,015 ÷ 0,054 mm |
| exhaust | 0,030 ÷ 0,069 mm |
- Install the new valve guides by using the special inserters which also ensure the correct stand out values
| Valve guide stand-out "S" | |
|---|---|
| intake and exhaust | 9,7 ÷ 10,1 mm |
Parts & tools for this job For 1994 Alfa Romeo 145/146
- PARTEngine gasket setSearch: Alfa Romeo 145/146 1994 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
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