Cm870 Turbo noise......new turbo?

[Nilao]

A little side play is acceptable but none in/out I believe. Your going to need insite to see the turbo rpm as well as an actuator test. One thing to check would be unhooking the actuator rod from the turbo and turning it by hand to insure it's not binding or stuck. You can also test the piston on the turbo by taking the air supply line off and hitting it with regulated shop air. I'd say no more than 100 psi should give it full movement.