Main bearings
- Make
- Alfa Romeo
- Model
- 145/146 Engines, 146 Bodywork and Engine Overhaul Manual
- Year
- 1994–2001
- Section
- Overhauling › Main bearings
Engine overhaul: 2.0 V6 Turbo (AR16202)Main bearings
- Caulk the caps with tool no. 1.820.056.000.
MAIN BEARINGS
- Fit the main bearings addressing them according to the indications given on the bearings.
- Fasten the nuts to the prescribed torque in oil. Check whether the main journal diameter falls within prescribed values.
NOTE: Use goniometer no. 1.860.942.000 for angle torque.
- Check whether the rear main journal shoulder falls within the prescribed values.
25 Nm + 79°
2.5 kgm + 79°
| Main journal diameter | 63.657 ÷ 63.676 mm |
|---|---|
| Rear main Journal shoulder length | 26.45 ÷ 26.50 mm |
CYLINDER LINERS
- The cylinder liners are organised into three classes - A, B and C - according to their internal diameter. They can be distinguished by means of the BLUE, PINK or GREEN labels on the outside.
- Check whether the internal diameter, taper ratio and ovality fall within prescribed values.
H = dimension check area
| Diameter (d) | |
|---|---|
| Class A (Blue) | 79.985 ÷ 79.994 mm |
| Class B (Pink) | 79.995 ÷ 80.004 mm |
| Class C (Green) | 80.005 ÷ 80.014 mm |
| Maximum taper ratio (M-N) | 0.01 mm |
|---|---|
| Maximum ovality (X-Y) | 0.01 mm |
PISTONS AND PINS
- The pistons - as the cylinder liners - are organised into three class according to their machining tolerance. The classes A, B and C can be distinguished by the BLUE, PINK or GREEN labels on the top of the piston.
- Check whether the external diameter of the piston falls within the prescribed values.
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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