Q: DEAR BT: I have a feeling I have a blown head gasket on my 2005 Scion tC. I think it should be relatively easy to replace, but one of my friends told me that it is more complicated than I thought.

How Does an Engine Work? Before digging into this significant expense, it’s important to outline how an engine works. The engine is the heart of the car, truck, or SUV. The vehicle’s full function is ...