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<p>[QUOTE=&quot;Heavyd, post: 4131526, member: 25661&quot;]There is a TSB from Cummins about this, TSB140030.&nbsp; There are a series of liners that they are calling &quot;lobed&quot;.&nbsp; Seems to be a manufacturing defect and the liners are not perfectly round, but have 13 equally spaced vertical lobes or high spots in the wall of the liner that prevent the rings from seating and allow carbon packing of the rings.&nbsp; These engines are experiencing oil consumption as bad as 500 miles per quart of oil.&nbsp; These are ISX15 models, mostly 2013 engines.&nbsp; The liners would have to be inspected if the engine is suspect to have these defective liners.&nbsp; The liners have a date code laser etched on them.&nbsp; They don&#039;t say if they are etched at the top or bottom, so I am not sure if the head or pan has to come off to simply check for the code, but you are likely to be taking the head off anyway.&nbsp; Affected part numbers are; 4311632, 2882464, 3685235 and 4101507.&nbsp; Liners with a date code of XPLZ 271 3 1 and later are ok.&nbsp; (271 is the day of the year, 3 is the year 2013, 1 is first shift).&nbsp; Any liner with a date code starting with ABDJV is ok not matter the date.[/QUOTE]</p><p><br /></p>

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