The wet liner can be easily replaced, while the dry liner requires special equipment as it is tight-fitted to the cylinder block. A wet liner is cooled precisely because it comes into direct contact with cold water, whereas a dry liner does not come into direct contact with cold water. Therefore, the working temperature of the dry liner is higher than that of the wet liner. A wet liner requires leak-proof joints so that cold water does not leak into the crankcase, whereas a dry liner has no such requirement. A wet liner does not require precise finishing on the outside, whereas a dry liner requires precise finishing. Finishing can be accomplished in a wet liner prior to assembly, while dry liners require finishing after assembly.