Scavenge port inspection:should not be carried after maneuvering,better to carryout at anchor b4 maneuvering(coz cylinder lubrication and combustion efficiency wont be misleading after slow steaming.
Procedure: keep jcw and lo running to find in case of leakage, shut starting air and engage turning gear, open indicator cock, start inspecting after opening doors, proper aeration starting with piston closer to bdc.
Observations:1-piston ring condition( no breakage,shiny running surface,well oiled and move freely in grove,ring edges must be without burrs.) 2.micro seizure and scuffing. 3.Check piston ring sticking with a wooden rod. 4.Clover leafing in liner 5.Blow by(indicated by dark areas).6. deposits on pistons(mechanical clover leafing in ring grooves due to wear) 7. lubrication( brown and white area in liner indicate corrosive wear.
Procedure: keep jcw and lo running to find in case of leakage, shut starting air and engage turning gear, open indicator cock, start inspecting after opening doors, proper aeration starting with piston closer to bdc.
Observations:1-piston ring condition( no breakage,shiny running surface,well oiled and move freely in grove,ring edges must be without burrs.) 2.micro seizure and scuffing. 3.Check piston ring sticking with a wooden rod. 4.Clover leafing in liner 5.Blow by(indicated by dark areas).6. deposits on pistons(mechanical clover leafing in ring grooves due to wear) 7. lubrication( brown and white area in liner indicate corrosive wear.
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