Is the radiator pressurized so early while the engine is running? How long would the engine run before it pressurized? And what is going on with BARF (LOL) that they are able to investigate a death in someone’s garage?
240F is the flashpoint of pure ethylene glycol.
The article completely distorts that fact to make it look easy to ignite the antifreeze...
I’m afraid I can’t answer any of those questions. I doubt that there would be much pressure initially but it would only take a few minutes with the engine running for it to build up. Very strange that BATFEGS would investigate this.