Auto Tech Transmission - Do not open the radiator cap when it is hot. Have you ever done that? | Facebook
Why can't I open the lid to the coolant fluid in my car? I have twisted left as much as I could. - Quora
![Orange radiator cap with warning labels in different languages: never open when hot, and blurred car radiator hose with yellow dotted arrow Stock Photo - Alamy Orange radiator cap with warning labels in different languages: never open when hot, and blurred car radiator hose with yellow dotted arrow Stock Photo - Alamy](https://c8.alamy.com/comp/2F5A633/orange-radiator-cap-with-warning-labels-in-different-languages-never-open-when-hot-and-blurred-car-radiator-hose-with-yellow-dotted-arrow-2F5A633.jpg)
Orange radiator cap with warning labels in different languages: never open when hot, and blurred car radiator hose with yellow dotted arrow Stock Photo - Alamy
![I don't understand what's wrong, the cap is on tight but I'm still loosing coolant : r/AskAShittyMechanic I don't understand what's wrong, the cap is on tight but I'm still loosing coolant : r/AskAShittyMechanic](https://i.redd.it/hbvk3xbiqtdb1.jpg)