Originally Posted by Gramicci101

I can tell you exactly what's going on. Your mechanic was trying to stiff you for money with an expensive, unnecessary item (head gaskets, dropped engine, etc...) This is similar to needing special HID headlight fluid. He screwed up the install, and the engine blew up. Now he's trying to cover himself by telling you it's your fault because you over-revved it (which you probably didn't anyways). He almost certainly had you sign some small-print form absolving him of all possible damages resulting from the maintenance, so you probably don't have a lot of legal recourse. Find a new mechanic.

Zookie: A type-1 overrev shouldn't hurt anything. This is you giving it too much gas and bouncing off the rev limiter. That's why the rev limiter is there, to stop you from hurting something. A type-2 overrev can potentially hurt your engine because the engine is being dragged mechanically above the redline. The rev-limiter can't stop that. If you go higher than the tolerances of the engine allow, you could break things. But it's a significant event that you would remember. (Like trying to shift from 5th to 4th and getting 2nd instead.) The extent of damage depends on what you did and for how long. Only a second or two might be a learning experience, or it might be a new engine, depending on how severe that second or two was.