Turbocharger Vacuum Diaphragm, Checking

Turbocharger Vacuum Diaphragm, Checking

Special tools, testers and auxiliary items required

• Hand Vacuum Pump (VAS 6213)

Test Conditions

• The hose between the turbocharger, the wastegate bypass regulator valve, and vacuum diaphragm must not be kinked.

• The wastegate bypass regulator valve must be OK.

Procedure

- Remove the engine cover with air filter. Refer to => [ Engine Cover with Air Filter ] Engine Cover With Air Filter.

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






- Adjust the slide ring - 1 - on the hand vacuum pump (VAS 6213) to the - B - position for "Pressure".







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

- Operate the hand vacuum pump (VAS 6213) several times, watch the linkage while doing this.

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

Actuator lift is approximately 10 mm.






• If pressure cannot be raised with the hand vacuum pump (VAS 6213) or the pressure drops immediately, check the hand vacuum pump (VAS 6213) and connecting hoses for leaks. If no malfunction can be found: Replace the vacuum diaphragm, refer to => [ Turbocharger Vacuum Diaphragm ] Service and Repair.