Liner Lacquering
It is the formation of a layer of lacquer on liner covering the Honing pattern, resulting in loss of oil control. It is mainly found in highly loaded engine with low sulpher gas oil. Lacquer probably originates partly due to decomposition of alkaline oil additives and partly due to decomposition at high pressure and temperature.
Phenomenon of Lacquering:-
When the fuel oil comes in contact with lub oil of high alkaline content then fuel react chemically with the alkaline of lub oil to form lacquer. Now due to high temperature the compound form burns and volatile part of the compound formed gets evaporated and leaving carbonic hard part. This hard part when rubbed with piston rings gets break and along with it some particles of liner also breaks leading to wear of liner.
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