I parked my car in the driveway and when I came out later, it would not start. If the timing belt is broken then how would I know if the valves are bent? One mechanic said he could do it for 90 bucks but refused to explain how he gonna do it. Mechanic #2 wants 250 bucks to put the belt on and if it runs ok, then it would be obviously more to complete the job. Thank you.