No or little water going to heater core?

Question

I have changed the thermo, water pump, disconnected hoses and blew air thru the engine. I even disconnected the heater hose right at the water pump and started the engine and nothing, no water coming out of water pump. Still only cool air coming from blowers in truck. The water pump is working. I think there is a plugged journal or something somewhere so that it can get the proper flow. I am not a mechanical engineer.

I have a 1988 Ford Ranger 2.9

There is no value inline or elsewhere. I will try bleeding the system again
Simply because I have nothing else to try

Please note; I have even blew 140PSI thru the block

Answer 1

U probably have a air pocket in your cooling system ...
There could be a air-bleed valve somewhere close to the upper hose or heater hoses.

If not - start your car cold with no radiator cap on .. and let it run for a while ... just don't run it for very long ... just so the water is warm .. not HOT.

This is a air pocket for sure !

Answer 2

Sounds like "air lock" in the heater core. Disconnect both hoses to the core and pour water into one until it comes out the second one, then reconnect the hoses or take off the radiator cap and try to release air that way, but do the radiator cap method "very carefully" to avoid possible burns. Don't forget antifreeze when finished, winter's almost here.

Answer 3

check to see if you have coolant going to the heater core. The are two hoses going to the heater core. Allow the vehicle to reach normal operating temperature and check to see if 1 of the hoses is warm to the touch. If it is you have a blockage in the system and the core will need to be replaced. Also check and make sure there is not a cutoff valve in 1 of the heater hoses