| 摘要 |
Provided is a novel regulating member that can be easily manufactured and has no adverse effect on cooling water or the environment. A spacer 6 inserted through an opening 30 in a cooling water channel 3 and arranged therein, said channel 3 being provided to a cylinder block 1 of an internal combustion engine, wherein the spacer 6 is characterized by comprising a rigid supporting body 7 formed in a shape capable of being placed in the cooling water channel 3, and a regulating part 8 that is supported on the supporting body 7 and that regulates the flow of cooling water, the regulating part 8 including a cellulose sponge 81 capable of being restored from a compressed state by coming into contact with cooling water w. |
