Looks like some sort if radiator cap.
https://i.postimg.cc/0N4CGcd8/IMG-9001.jpg
https://i.postimg.cc/qqVXSq5S/IMG-9002.jpg
https://i.postimg.cc/3RDFtmn2/IMG-9003.jpg
https://i.postimg.cc/3NXCT7MR/IMG-9004.jpg
https://i.postimg.cc/L4LVfkqp/IMG-9005.jpg
https://i.postimg.cc/L6S3VqfZ/IMG-9006.jpg