Checking engine tightness (CO content in the cooling system) (Opel Corsa C)

Note: Before the inspection procedure, warm up the engine to operating temperature (oil temperature – 80°C).

Caution: Remember that the cooling system is under pressure.

Open the hood.

Remove the coolant expansion tank cap.

Slowly unscrew the cap to release the pressure in the system.

Check the coolant level. Add coolant to the COLD mark if necessary.

Install the tester on the coolant expansion tank.

Start the engine.

Check the engine for leaks.

Note: The transparent cylinder of the tester contains a blue reactive liquid, which turns yellow in the presence of air containing the slightest trace of carbon monoxide. When fresh air is drawn into the test liquid, it is restored and again becomes blue.

Air is taken from the coolant expansion tank using a rubber bulb.

Caution: Do not allow coolant to enter the tester.

If the blue fluid in the main chamber of the tester turns yellow, the cylinder head gasket or cylinder head is leaking.

Tester check

The fluid can be tested by sampling gases from the exhaust pipe. In this case, the test fluid should turn yellow.

Turn off the tester and carefully release the pressure.

Install the coolant expansion tank cap.

Close the hood.