Check Valve, Checking
WARNING: This page is about a different car, the 2024 Audi S6 and 2024 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
-- Remove the check valve. Refer to CHECK VALVE, REMOVING AND INSTALLING .
- The valve must allow air to flow through in the direction of the vacuum pump.
- Valve must remain closed in the direction of the brake booster.
-- Install the check valve. Refer to CHECK VALVE, REMOVING AND INSTALLING .
- Note the flow direction: the arrow symbol faces the vacuum pump.