Radiator Stumper (hope someone can help)

Ok New water pump...10k miles on it. New radiator hoses upper and lower. New thermostat, new radiator cap. Ok i start my car in the morning, after 20 minutes the temp is only at 150-160. Upper and lower hoses are hot, cap is warm, heat is luke warm. I pull out drive way temp reaches 195..then goes back down to 155 then back to 195 then 155...flops back and forth while driving. Ok theres air in the line...bleed the line....no air comes out just coolant now. If i get in my car in the morning and go without warming it up it goes right to 195 then it goes down to 155ish again back and forth with the flexuating...Park, idle, temp goes to 195 and stays...nice scolding hot heat..get out upper and lower hose are both squeezable..no pressure building up?? No leaks, no blown head gaskets no cracks nothing?!?! DRIVING ME NUTS. Any suggestions would be appreciated :)

Ok New water pump...10k miles on it. New radiator hoses upper and lower. New thermostat, new radiator cap. Ok i start my car in the morning, after 20 minutes the temp is only at 150-160. Upper and lower hoses are hot, cap is warm, heat is luke warm. I pull out drive way temp reaches 195..then goes back down to 155 then back to 195 then 155...flops back and forth while driving. Ok theres air in the line...bleed the line....no air comes out just coolant now. If i get in my car in the morning and go without warming it up it goes right to 195 then it goes down to 155ish again back and forth with the flexuating...Park, idle, temp goes to 195 and stays...nice scolding hot heat..get out upper and lower hose are both squeezable..no pressure building up?? No leaks, no blown head gaskets no cracks nothing?!?! DRIVING ME NUTS. Any suggestions would be appreciated :)

get another thermostat, new does not mean its good. get a high quality t stat.

I place these in boiling water and then remove heat see what temp it closes. repeat several times...must close at the spec temp..

I agree 100% with the previous post and also you should try to switch radiator fluids that doggone dex is bull. It clogs therms and water pumps

Without going into my hair pulling situation, I would top off radiator every morning before starting my Monte. That got all the air out. The bleeder didn't work.

Without going into my hair pulling situation, I would top off radiator every morning before starting my Monte. That got all the air out. The bleeder didn't work.

remove bleed screw and clean . you are to bleed air with engine running.