Wastegate Actuator: Testing and Inspection

Checking
If it is not possible to adjust the basic boost pressure check as follows:

1 Check that the pressure rod can be moved freely and does not jam.

2 Check the diaphragm and spring by pumping up pressure via the units connection nipple. Check that the rod is pressed out without any tendency to jam. Release the pressure and check that the rod is pulled back into the unit.

Change the diaphragm unit if faulty.