- Bolt tightening torque: Cold engine (temperature approximately 20°C) — 105-115 Nm
2. Tighten the bolts in the sequence shown in the figure.
Note: For best results, start the engine and run it until it reaches normal operating temperature, then allow it to cool and re-tighten the bolts to the specified torque.
Compression check
1. Before checking the compression, check the engine oil level. Make sure the starter and battery are in good working order.
This publication is based on information from the portal [hyundaibook.ru]
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 spark plugs.
4. Remove the spark plugs.
5. Turn the crankshaft to remove debris from the cylinders.
6. Attach the pressure gauge to the spark plug hole.
7. Press the throttle pedal until it is fully open.
8. Turn 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 specified limit value, add a small amount of oil through the spark plug holes and repeat steps 6-9.
- 1) If adding oil results in increased 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 a stuck valve, worn valve seat, or leaking cylinder head gasket.
- Tightening torque: Spark plugs - 20-30 Nm