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The engine liner is responsible for ensuring the extremely hot exhaust does not damage the internal components of the engine. Due to its very important function, using replaceable cylinder liners can save time and costly machine work. But how do you determine if replacement is necessary? Examine your engine’s condition by performing the following procedure after removing and cleaning the cylinder liner:
we faced a really difficult case related to engine liners vertical cracks. After overhaul repair engine had been working hours and then got3 vertical cracks on3L cylinder liner. After we fixed that in hours we got the same issue on5R cylinder.
Pictures and full description are here.
https://sites.google.com/uralremmash.ru/komatsu-v/home
If you have any clues what has happened please let me know ASAP
This Is A Rare Issue.If Its Happens Due To Engine Block,Low Engine Compression
Cylinder liners may crack because of poor cooling, improper fi t of piston or pistons, incorrect installation, foreign bodies in the combustion space, or erosion and corrosion. Improper cooling, which generally results from restricted cooling passages, may cause hot spots in the liners, resulting in liner failure due to thermal stress. Scale formation on the cooling passage surfaces of liners may also cause hot spots; wet liners are subject to scale formation. Proper cooling of dry liners requires clean contact surfaces between the liners and the cylinder block. Particles of dirt between these surfaces cause air spaces, which are poor conductors of heat. Films of oil or grease on these mating surfaces also resist the fl ow of heat.
