In the Buicks case, technically it never locked. That's just what the guy at the dealership called it. The broken intake allowed for some pressure relief and grandma never ripped it through town turning a bazillion rpms. :-) I DON'T THINK! It got a little warm as she pulled into her driveway. She called me to come look at it. When I went to start it, the starter seemed to drag. Oil and coolant looked fine. I had the dealership pick it up on a rollback the next day. I told them I thought the starter was out but they told me different. I'm sure the window of time is much smaller, between a Banshee & a Buick, before catastrophic damage occurs.