1. BEST CONDITION: Machining mark remains completely.
2.ORDINARY CONDITION: Machining mark has been disappeared/ Liner surface smooth & well lubricated.
3. BAD CONDITIION: Dark patches on liner/ Scoring marks visible/ Liner surface dry.
4. SULPHURIC ACID CORROSION: Low temperature corrosion.
5. STEP WEAR & CRACK: There is step wears at position of TDC, also vertical crack can be seen.
6. Fuel injector leaking/faulty
7. Clover leafing of cylinder liner