Well I have a 1990 toyota tercel coupe it has 240,000 miles on it. Just wondering, what is the average legnth these cars last. Also why do these engines make loud valve noises. Thanks!!!!!

Do you have the mechanical history/maintenance done to the vehicle ?? That would help a lot. The valve noise is indication of needing the valves replaced or reground aka a "valve job". Usually when a car needs that, it's better to just get a rebuilt motor, as other things will go bad besides the valves

You're almost there, My son's lasted about 360,000. Just take care of it.