My timing belt broke on my 2003 hyundai sonata. I replaced the belt but the car still wont start. I was told that if i changed the belt but my valves were bent it would still run but it would be a loud knocking noise. I also need to know what parts to look up for the pistons and valves. i did a compression test and i only had compression in 2 cylinders (the car is a 4 cylinder). Could there be anything else wrong with the car? What should i do? Im still paying on the car and i still owe a lot on it...so i have to get it fixed the cheapest way possible.