I thought I just had air pockets in my coolant lines because my engine bay would seem a bit hot. So I drained the coolant to do a flush before adding new coolant and then trying to burp it. I have a spill-free funnel that I attached to the thermostat housing cap (i have a
Fluidyne radiator). I add the flush and then topped off with water from the hose. I started the car to let it run for 5 ...