Don't confuse a proper bleeding procedure with a bad radiator diagnosis. They are not related. You can put a brand new radiator in the car and not bleed it properly and it will still overheat.
Keep opening the bleeder until you get nothing but liquid coolant, That COULD fix the problem. The dealership replaced the water pump bypass hose on my Riviera. It was running hot until I took it back and they bled it until it had no air pocket and it ran cool.
regards
mech
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