Hi so I have a quick question and i wondered if anyone might be able to help. I have a 16v 1990 KR and iam just restoring the engine. Head is off and works progressing well but there is something I cannot identify on the engine block. On the lower right hand side of the block is a cylindrical part that slots into the block with a crescent shaped clamp on top of it. I have seen via various diagrams it slots down into the block but I cannot find anything that tells me what it. In the diagram seen via this link below its to the left of the number 25 but what is this. The reason i ask is i would like to remeove it clean it all up etc before i finish the car. https://www.heritagepartscentre.com/uk/volkswagen/golf-mk2/engine/engine-block-mounts.html.