What noise does it make when added to much oil to the engine?

You more than likely will not hear any unusual noise. However, if you overfill the crankcase this can cause engine damage. The crankshaft will make contact with the oil and create a froth. This froth will contain air mixed with oil which makes a poor lubricant. This will cause engine wear. If you suspect the engine oil is overfull simply park the vehicle on a level surface, wait at least 15 minutes after the engine has been shut down, and check the oil level. If it is overfull, drain out enough to get it down to the full mark.