Welp. I’m stumped. My coolant is bubbling and puking out the reservoir. Replaced reservoir thinking it had a leak or bad cap. Replaced thermostat 2 months ago. Replaced radiator w thermostat (had small leak) Not overheating at all, but gets a little warm after it pukes out enough coolant at highway speed. Good compression on all cylinders. Less than 3 lb variation, cold and warm. No coolant in oil. No oil in coolant. No appreciable loss of power. Owned truck for 6 years and it’s never overheated on my watch. I’m stumped y’all. Bubbling stops appx 1 min after shutdown, and it’s nowhere close to hot. Anyone else had this happen? 2001 2.3 154k 5spd