I assume I have an air pocket that is causing the below.

I cannot seem to get the water/antifreeze to flow, I assume I have an air pocket somewhere. I filled the radiator and tank near engine. I also tapped the pipe under the intake and routed it back to the tank in the engine area. I run the engine and it warms up to the point the radiator fans turn on, but the radiator is still cold etc. Let it cool down try again, it still does not seem to flow. Any help on how best to burp/bleed the coolant system would be appreciated.

Thank you in advance for any help and suggestions.
-Matthew