Attention.
- Hot engine and oil can cause burns. Be careful not to burn yourself when removing/installing various components.
- Fuel vapors are dangerous. They are highly flammable, causing serious injury and equipment damage. Keep sparks or open flames away from fuel.
- Leaks and leaks in fuel lines are dangerous. Fuel can ignite and cause equipment damage, serious injury or even death. Fuel can cause skin and eye irritation. To prevent this, observe the safety regulations when handling fuels and lubricants.
1. Make sure the battery is fully charged. Recharge if necessary.
2. Warm up the engine to normal operating temperature.
3. Perform the procedure for preparing fuel lines for vehicle service (see the relevant section of the chapter "Supply system").
4. Remove the following parts:
- decorative engine cover (see later in this chapter).
- Ignition coils/ion sensors.
- Spark plug.
- Fuel pump relay.
- Fuel injector relay.
5. Measure the compression in the cylinders:
- Press the compression gauge adapter into the spark plug hole.
- Press the accelerator pedal to the stop.
- Rotate the crankshaft of the engine with a starter, measure the compression in the engine cylinder.
Note:
Since the closing phase of the intake valves is delayed in the SKYACTIV-G 2.0 engine, the compression in the cylinders is low.
Compression for European versions (at 300 rpm):
- Standard: 978 kPa (9.97 kg/cm2).
- Minimum: 783 kPa (7.98 kg/cm2).
- Maximum difference between cylinders: 166 kPa (1.69 kg/cm2).
Compression for versions outside of Europe (at 300 rpm):
- Standard: 885 kPa (9.97 kg/cm2).
- Minimum: 7.08 kPa (7.98 kg/cm2).
- Maximum difference between cylinders: 150 kPa (1.69 kg/cm2).
Repeat measurements for all engine cylinders.
6. If the measured values are below the minimum allowable, or the difference between the cylinders exceeds the allowable rate, pour a small amount of engine oil into the engine cylinder through the spark plug hole and repeat the compression measurement:
- If compression increases after adding engine oil, this indicates wear or damage to the piston rings or cylinder bore. Appropriate repairs must be carried out.
- If the compression remains unchanged after adding engine oil, this indicates worn valves or a misfit in their seats, as well as a possible leak in the cylinder head gasket. Appropriate repairs must be carried out.
7. Remove the compression gauge.
8. Install the following parts:
- Fuel injector relay.
- Fuel pump relay.
- Spark plug.
- Ignition coils/ion sensors.
- Decorative engine cover.