Well, THERE'S your problem! Fortunately, the oil came out clean, so virtually no coolant went into the crankcase before the engine stopped. The pressure went out the radiator's lower nipple, which broke off & tore the hose.
Since I'll have to drop the pan to install the new (MotorCraft F6TP-6019-NA;
Dorman 635-100) timing cover, I'll just re-seal the whole engine: valve covers, intake, pan, timing cover, F&R mains, & water pump (also new MC PW254). It'll also get a Fumoto oil drain valve.
