Exhaust Turbocharger Vacuum Diaphragm, Checking

Exhaust Turbocharger Vacuum Diaphragm, Checking

Special tools, testers and auxiliary items required







- Hand vacuum pump VAS 6213

Test conditions:
- Hose from exhaust turbocharger over Wastegate Bypass Regulator Valve N75 must have continuity to vacuum diaphragm.
- Wastegate Bypass Regulator Valve N75 OK.

Work procedure:







- Separate electrical connector - 1 - .
- Disconnect intake connection - arrow - using spring-type clip pliers VAS 5024A .
- Remove engine cover upward and out in direction of - arrow - .







- Connect Hand Vacuum Pump VAS 6213 to vacuum diaphragm - arrow - .







- Set slide ring - 1 - on hand vacuum pump 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 Hand Vacuum Pump VAS 6213 several times and observe rods.
The linkage - A - must move approx. 300 mbar and be at approx. 700 mbar at end position.







Actuator lift is approx. 10 mm.

NOTE: If pressure cannot be raised with Hand Vacuum Pump VAS 6213 or pressure drops immediately, check Hand Vacuum Pump VAS 6213 and connecting hoses for leaks. If no malfunction can be found: Replace vacuum diaphragm.