2. Turn off the engine.
3. Check the charge level and, if necessary, recharge the car battery.
4. Turn off the ignition system.
5. Disable the fuel injection system.
6. Remove all spark plugs.
7. Disconnect from the throttle body.
8. Lock the throttle valve in the fully 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.
- Rotate the engine with the starter and measure the compression value in the engine cylinders.
- Read and record the compression meter readings.
- Remove the compression gauge from the adapter.
- Remove the adapter from the spark plug socket.
- Repeat measurements for the remaining cylinders.
10. Analyze the measurement results.
The minimum compression in any of the cylinders should not be lower than 70% of the maximum compression value in the other cylinders. At the same time, the compression in none of the cylinders should be lower than 965 kPa.
Note.
- In a normal cylinder, the compression value is displayed quickly and evenly up to the set value.
- If there are 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.
- If there are 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 compression below normal, 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 valve.
12. Install the intercooler air duct to the throttle body.
Article published on the website [Opelbook.ru]
13. Install spark plugs.
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