When I drive my Camaro about 7-10 or more, and turn off my overflow is full of boiling water. My temp gauge is reading good, but still bubbles a little. If I sit at a light and the temp gets high and then turn it off shortly after it will bubble alot. Looked in my overflow and it is dirty, rust maybe? Should I just flush my system?

 

Put a new rad cap on and flush the system.

 

Had to flush mine thrice to get it clean when my old 305 was in. I don't think I've ever used "thrice" before lol. Expanding my vocabulary.

 

Someone told me to take out my theromstat and run my Camaro without one, and wouldn't hurt it. I don't feel right about that suggestion.