2. Remove the spark plugs.
3. Remove the relay holder cover.
4. Remove the fuel pump relay.
Note: Cranking the engine to check compression should take no more than 10 seconds and be done at 30-second intervals.
5. Use the starter to rotate the engine crankshaft for five seconds to remove foreign particles from the cylinders.
6. Before checking the compression, make sure that the crankshaft rotation speed of the starter is not less than 300 rpm. If the rotation speed is below 300 rpm, it is necessary to check the charge level of the battery and the reliability of the fastening of the terminals and connectors of the starter.
Material copied from this website [www.OpelBook.ru]
7. Install the EN-48248 compression tester into the spark plug hole of the corresponding cylinder.
8. Turning the engine crankshaft with the starter, check the compression value in the cylinders. In a normal cylinder, the compression value is displayed quickly and evenly up to the set value. If there are malfunctions, the compression value is initially low, then gradually begins to increase, but never reaches the set level.
9. Record the obtained compression value for the tested engine cylinder.
10. Repeat the compression test procedure for the remaining cylinders. The compression value should be the same for all 4 cylinders. Record the obtained compression values for all engine cylinders.
Note: The maximum difference in compression values for different cylinders should not exceed 100 kPa.
11. Install the fuel pump relay.
12. Install the relay holder cover.
13. Install spark plugs.
14. Install the throttle body assembly.
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