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Check valve, crankcase ventilation, checking/replacement

Check valve, crankcase ventilation, checking/replacement


1. Remove Throttle body actuator unit (604) .

2. Check the function of the check valve using 30 14 883 Pressure/vacuum pump . Connect the pump with a suitable nozzle to the hole for the check valve.


3. Is it possible to pump up a pressure?

Yes: The check valve is in order. Refit the throttle body.

No: The check valve is faulty and must be replaced.

Go to step 4.

4. Remove the intake manifold, intake manifold with SAI.

5. Press out the check valve.


6. Fit a new check valve.


7. Fit the intake manifold, intake manifold with SAI.

8. Fit Throttle body actuator unit (604) .