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