Was on my way to work and over the radio i could hear something that sounded like a harley beside me. Turned the tunes down and it was my car. Pulled it over and it has a horrible knock. It drove normally before that and never put the engine under stress. It just came out of nowhere. I havent had a mechanic look at it because though im not a mechanic i know that its serious and will be too expensive for me to handle right now. Worst of all im stuck driving an Aveo! Just kidding its a damn good car. But Im not ready to give up on the gp. Just looking for advice, options, what have you. I dont know if its worth a rebuild because i have a transmission issue too. It shifts fine but gets hot and vibrates the car if on the gas. Mechanic said it was the bearings. So really i think im down to 2 options. Buying a used engine and tranny or parting her out. But im having a mechanic come give me a opinion before i do anything but its hard to deny that knock.