2. Turn off the engine.
3. Check the degree of charge and, if necessary, recharge the vehicle battery.
4. Turn off the ignition system.
5. Disable the fuel injection system.
6. Remove all spark plugs.
7. Disconnect from throttle body.
8. Lock throttle in full open position.
9. Measure the compression in the engine cylinders:
- Screw a suitable adapter into the spark plug socket.
- Install the compression gauge on the adapter.
- Rotating the engine with a starter, measure the amount of compression in the engine cylinders.
- Read and record the pressure gauge readings.
- Remove the compression gauge from the adapter.
- Remove the adapter from the spark plug socket.
- Repeat measurements for other cylinders.
10. Analyze the measurement results.
The minimum compression in any of the cylinders must not be lower than 70% of the maximum compression in the remaining cylinders. In this case, in any of the cylinders, the compression should not be lower than 965 kPa.
Note.
- In a normal cylinder, the compression value is displayed quickly and evenly up to the set value.
- In the presence of leaks through the piston rings, the compression value is initially low, then gradually begins to increase, but never reaches the set level. After adding oil to the cylinders, the compression increases significantly.
- In the presence of leaks through the valves, the compression value is low at first and remains at the same level without increasing further. After adding oil to the combustion chamber, the compression practically does not change.
- If two adjacent cylinders have low compression, and after adding oil to the combustion chambers, there is no increase in compression, the cause may be a leak in the gasket between the cylinders.
11. Unlock the throttle.
12. Install the intercooler outlet duct to the throttle body.
13. Install spark plugs.
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