Easiest way to check timing belt - 1990 Toyota Corolla

If you simply want to check the timing belt condition, then remove the plastic cover and visually inspect it. If you have the 5 sfe engine, the timing belt cover is a 2 piece assembly, upper and lower. if you have the 7 afe or 4 afe engine the timing cover is 3 pieces and to inspect the top of the timing belt you must remove the 4 nuts holding the valve cover down and the 2 bolts holding the wire loom. remove the whole valve cover. to inspect timing belt condition.