Originally Posted by n54door
tell them to measure the tolerances for the wastegate actuator arm and lever, and inspect the wastegate lever bushings. That will determine if you need the turbos/wg repaired.
Solenoids have nothing to do with a car rattling.
Remind them a obvious rattle/clanking sound is typically caused by sizeable mechanical parts (like wastegates levers) clanking around, it 'rattles'.
Actually, with weak solenoids it won't allow the wastegate to have full movement if its not reaching the proper hgs. Can this also lead to rattle, I'm not totally sure but there is no evidence saying it would or wouldn't.