Need help with Heat it’s cold in Michigan

[RayGe13]

I recently was given a 1997 Eagle Talon TSI AWD for free it sat in my buddies garage since 2010. I got it running new battery ,brakes,clutch master cylinder. My problem is I get heat after the car warms up but it quickly goes away. I’ve replaced thermostat and radiator. I’ve flushed out the heater core and it flows nice. Upper radiator hose get hot but lower is ice cold. any ideas guys?

 

[TerminalTalon]

You either have a flow issue, thermostat issue, or a leak that caused an air pocket. Always pressure test a system. I always set every vehicle to 15 psi and wait 20-30 minutes. If the pressure goes down you have a leak. You find it with soapy water.