Turbocharger Vacuum Diaphragm, Checking

Turbocharger Vacuum Diaphragm, Checking

Special tools, testers and auxiliary items required

• Hand Vacuum Pump (VAS 6213)

Conditions

• Hose from the wastegate bypass regulator valve (N75) to vacuum diaphragm must be free of kinks.

• Wastegate bypass regulator valve is OK

Procedure

- Remove the engine cover/upper air filter housing. Refer to => [ Engine Cover/Upper Air Filter Housing ] Engine Cover/Upper Air Filter Housing.

- Connect the (VAS 6213) to the vacuum diaphragm - arrow -.





- Set the slide ring - 1 - on the (VAS 6213) to position - B - for "pressure".





CAUTION!
The pressure must not exceed 750 mbar. If the pressure is exceeded, the vacuum diaphragm can be damaged.

- Operate the (VAS 6213) several times and observe rods.

The linkage - A - must move approximately 300 mbar and be at approximately 700 mbar at end position.

Actuator lift is approximately 10 mm.





• If pressure cannot be raised using (VAS 6213) or the pressure drops immediately, check the (VAS 6213) and connecting hoses for leaks. If no fault is detected: replace the vacuum diaphragm. Refer to => [ Turbocharger Vacuum Diaphragm ] Service and Repair.