Cylinder cooling system to maintain optimum cylinder liner temperature (figure 7.14 in Chapter 7).
Longitudinal expansion of the liner takes place through the lower cooling jacket. The sealing of the cooling water is accomplished by silicone rubber O rings installed in grooves machined in the liner which slide the jacket as the liner expands and over contracts (figure 2.31). Theo rings are in groups of two, he space between them being open to the atmosphere via an inspection hole. Leakage of water past an O' ring will be seen at the inspection hole which not only a the engineers but also prevents leakage into the scavenge space. Great care m be exercised to ensure that the O rings are not damaged when re-fitting a cylinder liner into the cylinder jacket .The good