Cm570 engine brake vibration and weak jakes

[tree98]

(10-09-2023 )Marat Wrote:  is there anything else that could make it fail this test?

The bubble is compression being pushed back through the injector......... so I would say no.

Put genuine cummins injectors in and I bet it doesn't leak. Injectors seem to be a total crapshoot if you use aftermarket/ rebuilt. Although I will say a 570 Injector would be more forgiving than a common rail engine Injector.