Removing
1. Before removal, mark the direction of flow to the one-way valve on the shut-off valve (see illustration).
2. Disconnect and remove an air duct and vacuum hoses.
3. Loosen the shut-off valve bolts and slide it to the side
4. The shut-off valve can now be removed from the bracket.
Examination
5. You will need a vacuum pump with a pressure gauge to check the shut-off valve. Connect the shut-off valve and check that the through hole is fully open.
Installation
6. Install in reverse order. Make sure the valve is installed in the correct direction.
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