The invention relates to an engine component (1) of a reciprocating piston engine with a group of several cylinders (3) arranged side by side, between which a land area (2) extends in each case, wherein in the land area (2) between two adjacent cylinders (...

A ringed coolant water passage 16 formed to surround a plurality of cylinders #1-#4 is provided. Two partitioning members having a larger thermal expansion coefficient as compared to that of a cylinder block 10, and separating the ringed coolant water pass...

A spacer (14) fitted inside a water jacket (13) which is formed to surround peripheries of cylinder bores (12a) in a cylinder block (11) of an internal combustion engine includes: a spacer main body part (14a) partitioning the water jacket (13) into an upp...

A spacer (14) covers intermediate portions of respective cylinder bores (12a) in a depth direction of a water jacket (13) throughout the entire peripheries of the intermediate portions in the peripheral direction. Accordingly, the intermediate portion of e...

A height (H) of a spacer (14) which is arranged inside a water jacket formed to surround peripheries of cylinder bores of a cylinder block of an internal combustion engine is made to be lower by a step (t) in an intermediate portion thereof in a cylinder r...