The erosion is predominately on the thrust side of the liner.

This condition is again caused by the implosion of small oxygen bubbles on the cylinder walls. The difference in diesels is that the bubbles are formed by the violent action of diesel combustion.( similar to the bubbles that form in a drum of water if you were to bang on the side of the drum with a hammer.) This diesel liner erosion has the appearance of a multitude of small holes in a concentrated area.
Even with the use of the correct heavy duty coolant, the aggressiveness of this type of erosion necessitates the repositioning of the liner at service intervals. The erosion is predominately on the thrust side of the liner. If the wet liner is operated in the same position for long enough the erosion will eventually form a hole into the cylinder with disastrous results.(hydraulic bending of the con rod and severe overheating)