Compression pressure test (Z10XE, Z10XEP, with air conditioning) (Opel Corsa C)

Note: The engine must be warm (oil temperature min. 80°C).

Verification procedure

Open the hood.

Remove the ignition module.

Remove the ignition module cover and slide it to the right.

Disconnect the wiring harness connector.

Unscrew the 2 mounting bolts.

Remove the cover using the KM-6009 1 tool.

Note: Do not tilt the lid.

Remove the spark plugs.

Remove 3 spark plugs using the KM-194-E tool.

Remove the fuel pump relay.

Remove the fuse box cover.



Remove the fuel pump relay (arrow).

Check the compression pressure.

Note: This procedure requires two people.

Press the accelerator pedal.

Maintain the full load position.

Start the engine (approximately 4 sec).

Note: The engine speed must be at least 300 min⁻¹.

Compare the compression pressure values.

Maximum pressure difference 100 kPa (1 bar).



Install the fuel pump relay.



Replace the fuse box cover.

Install the spark plugs.

Using KM-194-E, tighten 3 spark plugs to 25 Nm.

Install the ignition module.

Tighten the 2 mounting bolts to 8 Nm.

Connect the wire harness connector.

Install the ignition module cover.

Close the hood.