|
I have a very similar sound on the passanger side too. (stock 2013 BRZ) .Its a random knock like yours that is most noticble if I turn the car off when it is hot, then restart 4 min later, and let it settle to idle without driving it. Someone else had it diagnosed at the dealer and they wound it was a rattle from the rocker arms. When he had the rocker arms replaced, the sound was gone. I have noticed the sound is much less since I change from 0W-20 to 5W30 for the summer. Did they rebuild the upper engine rocker arms with you??
|