Analysis of water seepage causes in the cylinder cover of a marine engine and its improvement
ZHU Mingjun
NI Chaojie
LI Bing
Abstract：To solve the problem of water seepage in the cylinder cover during the bench test of a marine engine,systematic physical and chemical inspection methods including macroscopic analysis,non-destructive testing,mechanical property testing,chemical composition analysis,SEM morphology analysis,EDS energy spectrum analysis,and metallographic analysis are adopted to analyze the causes of water seepage,the improvement measures are proposed.The results show that the presence of nodular slag defects inside the cylinder cover is the main cause of water seepage in the marine engine cylinder cover.Under the cyclic operating conditions of the engine bench test,some dense nodular slag defects form channels penetrating the cylinder head wall.By improving the casting process of the cylinder cover and adding air tightness test in the finished product inspection process,the risk of water seepage in the cylinder cover can be effectively prevented.
Keywords：cylinder covernodular slagphysical and chemical inspectionmechanical property analysis
Publication Date：2025-09-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 55-62 )