Abstract: A combustion engine has a cylinder liner with a top boss which is an interference fit in the block, and a midstop flange. The outer portion of the liner between the top boss and the midstop flange forms a wall of a coolant passage. A cylindrical inner portion of the liner is at least 30% of the length of the liner, and has a groove in the outer surface thereof adjacent to its bottom end. In the groove is a support ring which swells up under the influence of engine oil to contact a radial support section for the bottom end of the cylinder liner.

Abstract: A combustion engine has a cylinder liner with a top boss which is an interference fit in the engine block, and a mid-stop flange. The outer portion of the liner between the top boss and the mid-stop flange forms a wall of a coolant passage. A cylindrical inner portion of the liner is at least 30% of the length of the liner, and has a groove in the outer surface thereof adjacent to its bottom end. In the groove is a resilient support means, and when the liner is fitted in the block, the support means is compressed by contact with the block, to form a radial support for the bottom end of the cylinder liner. The resilient support means can be a corrugated spring steel strip.