Then why not go after his mechanic to cover some of the costs to get it up and running, if this is the case? If this was my car and someone did shotty work to cause me more mechanical problems. I sure as hell would go after them.
And don’t take this a a flame. I just want to know why you dont hold the mechanic liable for the damages he has caused. And by the way who is the mechanic? With doing shit like that he should be dragged out in the open.