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Cavitation erosion on wet cylinder liners has been occurring for many years. However, the higher loads that have been applied to the engines in recent years are enhancing its effects. The material removal during the cavitation occurrence can reduce the engine life considerably, as the liner can be perforated resulting in the mixture of the coolant fluid with the lubricant oil of the engine. This paper discusses the most important points found in a bibliographical review about this subject creating a better theoretical basis for the development of new materials and designs of cylinder liners. The results of the development of a new test procedure to study the cavitation on cylinder liners are also presented, with the objective of reducing the duration and cost of tests in dynamometric benches.

The exhaust gases emission regulations, with very restrictive limits, have imposed the need of developments in other areas, among them, in the internal components developments. The necessary maintenance of low levels of oil consumption for long periods of engine use, leads to the development of components with higher wear resistance and higher efficiency. Among these components, the piston rings and the cylinders play an important role in the oil consumption control and also in the engine service life. This paper presents the results of engine tests run to compare the components wear (piston rings and cylinders) when using different types of lubricant oils.