This tutorial demonstrates how to create a simple underwater world in Kodu Game Lab.In this tutorial we add a fish to move around in the water.1  Education.his tutorial demonstrates how to create a simple underwater world in Kodu Game Lab.
An O-ring is a round ring that is used as a gasket for sealing a connection. O-rings are typically constructed out of polyurethane, silicone, neoprene, nitrile rubber or fluorocarbon. These rings are commonly used in mechanical applications, such as pipe connections, and help to ensure a tight seal between two objects.
The O-rings in question are the large ones that are responsible for providing the seal between the alternating steel and aluminum sections of the engine. There are two sets of O-rings at each section joint--an inner one and an outer one. These O-rings function to keep coolant flowing through the passages from section to section. The outer O-ring keeps coolant from leaking to the outside of the engine.