To install a timing belt after removing the previous belt, insert the new timing belt on the camshaft teeth and crankshaft sprockets. Turn the crankshaft pulley all the way around twice to secure the belt on the sprockets, and verify the timing marks are correct. While timing belt installation varies depending on the vehicle, it typically follows this general procedure.
Let the engine cool down before you work on it, and wear safety equipment such as gloves and protective glasses. Before you remove the old timing belt, disconnect the negative battery cable. Take off anything necessary to access the timing belt cover, and remove the cover by unscrewing the bolts holding it in place. Loosen the timing belt tensioner to take the old belt off, and loosen it all the way before putting on the new belt.
If the timing belt drives the water pump, you should also replace the water pump to avoid having to do it later. Check the condition of the timing belt tensioner, the timing belt tensioner bearings, the camshaft seals and the crankshaft seals while installing the timing belt. Replace any of those that have damage or significant wear. Once you install the new belt, put everything back into place and reconnect the negative battery cable. Start the car and listen for any abnormal sounds.