- Lubricating Condition
Note whether the “oil film” on the cylinder wall and piston rings appears to be adequate. All piston rings should show oil at the edges.
White or brownish coloured areas may sometimes be seen on the liner surface. This indicates corrosive wear, usually from Sulphuric acid and should not be confused with grey-black areas, which indicates blow-by.
In such cases it should be decided whether, in order to stop such corrosive attack, a higher oil dosage should be introduced
Replacement of Piston Rings
When piston rings should be replaced?
It is recommended that the complete set of piston rings is replaced at each piston overhaul, to ensure that the rings always work under the optimum service conditions, thereby giving the best ring performance.
