I just replaced a lower radiator hose and did a coolant flush and then fill. Immediately after filling the reservoir up the first time I noticed something was off. There is no coolant bleed screw. Upon investigating, it seems like there should be one on the firewall right above the brake booster, and I have 2 hoses there that were joined, but they were both plugged with a solid steel rod, preventing coolant to flow through. I constructed a temporary solution that allows me to vent air out and plug it the rest of the time, connecting those 2 hoses together again so that coolant can pass through. I can’t find a part number or any more info on the bleed screw, or whatever is sandwiched between those hoses off the heater control valve so i have no idea where to start. Can someone give me some pointers on how I should fix this?