Stop in for a cup of coffee
I will share what I built for a catch can for my boy's car. Made it from a General Filter used for house plumbing, put the hose barb off the bottom - from his Grandpa's old store @Just Ron I think the reason it occasionally overheats is the lack of catch can. Puke some coolant when hot, then pull in air, until it is low on coolant and air locked. I built it, filled it half full of water and it was gone after the car cooled. Must work.