On a slow-speed diesel engine vessel you are supervising a routine piston pull on a cylinder with 10000 hours on the liner. The piston rod is disconnected. Why must the ridge on the liner be removed before lifting the piston?

Question

Accepted Answer

The ridge interferes with the piston removal and must be ground down.

Answer

The ridge is an expansion of the exhaust vents that interfere with the piston removal.

Answer

The ridge is part of the exhaust trunk that extends into the path of the piston removal.

Answer

The ridge is a protrusion on the piston crown and must be removed to fit through the liner opening.

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