Take off the radiator cap and run the engine for 10-15 mins until hot.
You should be able to look down into the radiator and see the water
moving if the thermostat is open. Never heard of a bleeder screw as it
is a recirculating system.
Could be too much hard deposit build up in the radiator or too many fins
bent over blocking air flow. Have you checked the fan and fan clutch?
> i have a 94 rodeo if i sqweeze the line you can hear the thermostat opening
> so i dont think it is that i thin it is air pockets. How could i get them
> out? And is there a bleeder screw?