This happened on a brand new motor, it was a M62 Eaton on 2.0 Ecotec engine. The supercharger was removed and upgraded before the engine was ran.
A guy dropped a washer into the intake and didnt realize it, but it didnt bother him either when he had to grab another one to replace it.
Anyways the car was being test driven with no boost and ran find. Once we got on to the boost after a couple miles and let of I presume the washer went through the bypass valve when we left off and went through the rotors.
Not knowing what the sound was we boosted it a couple more times before determining where the sound was coming from.
Got the car back to the shop and tore it apart and found the left overs of the washer and the destruction it had caused.
A guy dropped a washer into the intake and didnt realize it, but it didnt bother him either when he had to grab another one to replace it.
Anyways the car was being test driven with no boost and ran find. Once we got on to the boost after a couple miles and let of I presume the washer went through the bypass valve when we left off and went through the rotors.
Not knowing what the sound was we boosted it a couple more times before determining where the sound was coming from.
Got the car back to the shop and tore it apart and found the left overs of the washer and the destruction it had caused.