* The engine may not start. If the timing belt is not installed correctly, the camshaft and crankshaft will not be synchronized, and the engine will not be able to run.
* The engine may run rough. If the timing belt is not installed correctly, the engine may run rough, misfire, or stall. This can cause damage to the engine's pistons and valves.
* The engine may overheat. If the timing belt is not installed correctly, the engine may overheat. This can cause damage to the engine's head gasket, pistons, and valves.
* The engine may break down. If the timing belt breaks, the engine will break down. This can cause serious damage to the engine, and may even require a complete engine rebuild.
It is important to have your timing belt installed by a qualified mechanic to avoid these problems.