- Bolt torque: Cold engine (temperature around 20°C) - 105-115 Nm
2. Tighten the bolts in the sequence shown in the figure.
Note. For best results, start the engine and let it run until it reaches normal operating temperature, then let it cool and retighten the bolts to the correct torque.
Compression test
1. Before checking compression, check the engine oil level. Make sure the starter and battery are in good working condition.
2. Start the engine and wait until the coolant temperature reaches 80-90°C.
3. Turn off the engine and disconnect the wires from the candles.
4. Turn out candles.
5. Rotate the crankshaft to remove debris from the cylinders.
6. Attach a pressure gauge to the spark plug hole.
7. Press the throttle pedal until it is fully open.
8. Rotate the crankshaft and read the pressure gauge.
- Limit value: 1050 kPa at 250-400 rpm
Malfunctions and their causes
9. If the compression or pressure difference in the cylinders is below the given limit value, add a small amount of oil through the holes of the candles and repeat steps 6-9.
- 1) If the addition of oil results in an increase in compression, this means that the gap between the piston rings and the cylinder bore has been exceeded due to wear.
- 2) If the compression remains at the same level, the cause may be valve sticking, valve seat wear, or head gasket leaks.
- Tightening torque: Spark plugs - 20-30 Nm